Ls1 idle screw. Camshaft is a Cam Motion 228/242 118+4. Sep 12, 2007 · Willow> I think that the idle vacuum depends on the cam more than the FI setup. I need a new Tps now since the other one fell apart. When you do drive it, baby it and do not go WOT. Find IAC Steps. 7L, 6. If the engine doesn’t have enough air, the air-to-fuel mixture ratio is off, and some fuel might be left after the spark. Not much luck so far. Lay the manifold in position on the engine. shoebox It does sound like the IAC (Idle Air Control Valve) may be acting up. May 6, 2008 · 40211 posts · Joined 2003. 1) You will want to monitor your IAC, Idle Speed, throttle position voltage and your Throttle Position %. Figure 4. The VCM Editor>Edit>Engine>Idle>Base Running Airflow>Idle Airflow vs. After I installed the cam and heads the idle vacuum is around 10". When I had the stock cam my idle vacuum was usually around 18". Opening the blades a little more should bring the counts down (remember to check your TPS setting again). SSs did not ALL go to SLP starting in 98. Oct 16, 2023 · Adjusting the screw wont mess with the tune, however the correct way to set the throttle angle on a cable car is to perform an iac reset. When you modify that engine and fit a large aggressive cam, you need to consider what RPM that engine is now going to want to idle at. I sent my CPU off to have a tune put on it till i can get to the dyno. Don't start it. 1998 cars have a completely different PCM from 99+ cars 23. IAC counts go down proportionally as you add fuel to a point, and it'll also want more timing advance. 02 35th LE Camaro SS. No other major mods but the car idles high, between 1100-1500 even when warm. My Projects: (for 1994-1995 LT1) :: Dec 4, 2020 · Backfiring. Key the car to the ON positiong. Jun 13, 2019 · 1 - Turn the KOEO, while viewing your scanner, adjust your throttle body set screw until your throttle position is 2%. Idle Air Control Kit - Billet 2 Port Housing With 2 Screw Style MotorDiameter: 10mm (3/8") Idle Air Control Kit - Billet 2 Port Housing With 2 Screw Style Motor. It has a serious idle problem. The idle mixture screws are then used to set the best idle a/f mixture. I'm currently trying to get the IAC Position to 2% at idle hot. I have a LS6 intake and P&P S2 Throttle body. When you're adjusting the TB set screw to get your IAC counts into the right range you have to do this each time. Idle is 800RPM steady as a sniper's hand. 5. Jun 22, 2012 · Unplug the sensor, turn the key to the on position for about 30 seconds. 7477 posts · Joined 2005. an idle relearn is basically just starting the car and letting it idle in park a/c off for 5 min, park a/c on for 5, in gear a/c off and on for 5 each but I don't think that's your issue. effective area and Base Idle Airflow together. I just rebuilt my ls1 and at start up the idle is around 250-500rpm. The more overlap you have the less vacuum you are going to have at idle. 1-3 minutes is too long. if you don't have that hooked up, then the ECU is blind as to the actual operating condition. The stepper motor drives a valve pintle which protrudes into a passage that bypasses the throttle plates. I'll start all over tomorrow night and see what I end up with. A lot of people will say set your TB blades, then adjust your TPS voltage. We are trying to get a friends LS1/4L60e going in his classic car (in other words this is a Feb 21, 2018 · 409 posts · Joined 2010. Like. 2 - Turn your key to the OFF position, disconnect your scanner. 3 v8. Any excess air into the engine will idle it up, so also check your PCV hoses, especially where it crosses around the back of the engine from the driver side to the passenger side and also the hose between the intake and the PCV valve. It uses the value it sees at closed throttle (learned PCM value) as 0%. hpl. 05-01-2011, 07:56 AM #9. The car needs tuned. Then check and reset your TPS voltage as necessary. 4-Tune the IAC steps vs. Angelique- 2004 PBM/Black M6 - 6000k HID Lows, 3000k HID fogs, LS7 Clutch, Pacesetter LT's w Oct 10, 2005 · The vacuum gauge needle should not fluctuate more than 1/2 to 1 inch. I went through the checklist on startup. I started playing with the iac park position, idle air, and MAF tables tonight. I have completely rebuilt the motor and installed a GM hot cam with full length headers, a ypipe, and magnaflow exhaust. if you adjust it you need to zero the TPS again. I have turned in the idle screw about 3 turns and I have driven it about 70 miles and it still will not idle the first time you put it in gear. Plug the sensors back in and start the car. 40211 posts · Joined 2003. With over 30+ years of GM twin-screw supercharging experience, Whipple's team have now engineered one of the most powerful intercooled twin-screw SC system available today for your LS based engine. May 6, 2015 · Currently my IAC counts are maxed out on a cold start with my TPS voltage set at 0. 3, and 6. set screw until your throttle position is 2%. it has an aftermarket throttle body and the nitrous wires into my tps . 6) Turn the ignition off. Known issues are warping over time, you usually see this if you by them use. I would go to push in on the clutch and the car will actually idle higher like 1500+ until I come to a complete stop and then it will either go to about 1100 or it will idle at 500 almost dying. Zach/90\irocZ. Jan 27, 2008 · LT1 - Idle Adjustment. www. Many people use it to crack the TB blade open to compensate for poor idle and tune issues. H/C/I/TB LS1 Swap - Hanging Idle. The stalling at a stop is typical after a cam install. Should I start over to get more accurate idle airflow or that wouldn't change much. I’ve installed a Terminator X on a LSx 5. KeenGolfer. 01-27-2008, 09:19 PM. Aug 23, 2012 · Starts then DIES. 1 2. 3 heads -TQv2 cam 114 LSA -Pace LTs -3" y pipe -37lb injectors -Gutted stock MAS -LS6 oil pump and timing chain -LS6 intake manifold Apr 15, 2010 · mistermike. 02-23-2015 #4. If IAC values are way high, the IAC is trying to let in more air to allow it to idle. Urgent . Now drill hole 1/64" larger and repeat test. 67 volts. It controls AFR by opening or closing the throttle blade slightly to meet the values in the cells at a given coolant temperature. Nov 22, 2007 · 182 posts · Joined 2007. . 21. If you can't fix it in the ECU tuning, you could just blip the throttle when clutching in, so that you exit the idle control and start fresh. Assembled in house with new connectors, terminals, and seals from Packard, and TXL grade wiring. I recently bought a 1996 T/A and am new to the LT1. #4 · Aug 25, 2011. After quite a bit of cranking (assuming due to no fuel in the lines, rails, injectors) it started and ran smooth as silk for 3 seconds then died Jan 24, 2019 · Kyostar Throttle Position Idle Air Control Throttle Body Sensors TPS IAC For LS1 LS2 LS6 LSX LS7 It also work with other factory LS motor cable driven throttle bodies (4. The only gasket that isn't reuseable 24. Dec 3, 2018 · 1. Note the reading on the vacuum Aug 11, 2019 · It's $59. Boost gets you laid, unless your name is Jon. Oct 29, 2017 · Also do not forget if you have a cheapo China throttle body, you need to port the iac holes. com. Oct 12, 2017 · The 5. 4. Nov 19, 2009 · the answer is no. Generally this will be anywhere from 1 to 2 turns out from fully seated. Sep 12, 2008 · With the idle screw out and butterfly in place ''this is where i went wrong''make sure the hole in the butterfly is at the bottom of the tb my butterfly had a b marked on it and they said to also make sure that points to the front of the tb with the butterfly closed completely it should self centre it self then tension the screws. May 25, 2017 · LS Idle Air Control Valve & Throttle Position Sensor Bolt Kit. ( ** Note edited 1/11 to change M6 idle from 650 to 800. First off I need to say that I am still a novice especially when it comes to tuning with major engine changes. 075v) If your engine has a non-adjustable TPS, the way to adjust those TPS setting is to elongate the screw bolt holes which will allow the TPS to be rotated. 03-12-2012, 08:05 PM #6. Jan 8, 2020 · Forum Rules. 98 T/A w/ mods, 00 FBVert. If not, elongate TPS mounting holes and clock sensor until it does. You've got it running and warmed up but now you Jun 3, 2006 · So I finally drilled a 5/32's hole in the middle of the throttle body blade (on the recommendation of Creech, my tuner) and man, I wish I'd done this months ago! The drivability has gone up exponentially, and there's not more searching, just drops right into it's proper idle. 7L LS1 engine. I've heard of adding timing to "strengthen" the idle, but I haven't been able to figure out how to Sep 30, 2010 · 6636 posts · Joined 2009. Golen Engines website has instructions on how to do that and they recommend . it's generally a cure for a problem where a modified enigne doesn't have enough air moving through the IAC to idle properly, but opening the throttle plates to compensate creates BLM splits because the cylinders are not being fed evenly. i also know that it has a bad intake gasket that leaks iol up front but not sure about air. #26 · Jul 24, 2010. Pulled the IAC a few days ago and cleaned With a stock LS, the factory idle speed will be around 550 - 600 RPM. Sounds like you have some form of un-metered air Sep 26, 2023 · Carbed LS, stronger idle. Naaman. Constructed with high-quality materials and assembly. Curb idle speed screw is set at about 900. One stoplight its idling perfect at 850 and while going to the next stoplight. sensor from the stock manifold to the rear of the Weiand manifold. #6 · Jan 1, 2007. Mar 28, 2007 · Joined Jun 21, 2009. My Projects: (for 1994-1995 LT1) :: In this video ill show you how simple it is to replace your idle air control valve (iacv) for a 99-06 silverado 4. did you reset the tps after messing with the blades? 20-40 iac count is pretty spot on at idle. 4) Unplug your Throttle Position Sensor (TPS). Navy Blue Metallic. On the handheld go back to the Main Menu and enter into Dashboard. The Idle Air Control valve is a PCM controlled stepper motor located on the throttle body. 79v. 2004 Yellow M6, 1 of 1014. Plug in TPS if unplugged. 8L, 5. I had the car tuned by a reputable shop a couple years ago for the heads and cam on stock injectors and LS6 intake and it ran and idled great. The car can't stay alive at idle with the choke off until it hits exactly 180*, then it'll stay alive when coming to a stop, but not before dipping and hunting for RPM's a bit. Vortech’s new twin-screw blower is offered in kit form for the rectangular-port LS3 engine of the Camaro and G8 GXP, with more applications expected. Last night using the set screw I had my warm IAC counts at 55 but after fooling with it tonight they're up around 95-100 now. Hate to say it but those BBK intakes are know to have issues. 64 volts may be the final opening voltage on Need help with LS1/4L60e tune, bad idle. if your car has been tuned, perhaps Sep 2, 2022 · LSA on 383 LS1 - Idle surge. Extra idle control is provided with the addition of an idle bleed screw. Most likely they will be in the high 60's with 1/8" hole. Product Description: Idle Air Control Valve Connector, 94-97 LT1, 98-02 LS1. This fuel then makes its way through the system and could โปรดตรวจสอบ ชนิด / มิติ / รายละเอียด ของชิ้นส่วน LS1-M5 ในชุด locking screw Class 1 ข้อมูลรายละเอียดเฉพาะและขนาดอาจไม่ครอบคลุมในบางสินค้า. 18-09-2008, 07:02 AM #3. Open up the hole toward the air intake as it comes in, and the hole where it goes out into the intake manifold. So you installed your Holley Sniper. Hello all. reset the tps {unplug the tps, key on for thirty seconds, key off, plug back in} you would also need to have the set screw up to a certain point, unless the iac is stuck or bad. I added the FAST intake, NW TB, MAF, and 42lb injectors Sep 12, 2007 · Willow> I think that the idle vacuum depends on the cam more than the FI setup. The car was owned by a friend of mine before, motor was rebuilt 15k ago and has high-lift rockers on a stock cam. This fuel then makes its way through the system and could LS1 Idle Issues. 0L, and others based on the Aug 22, 2013 · Install the 1/2” barb fitting and the 1/4” barb fitting in the rear of the manifold. Utilizes the most modern technology to help you get maximum fuel efficiency and power from your GM LS engines such as 4. Ported Fast 102 intake. Includes: Matching plugs and pins. Take it out (stock, the hex will be facing down. New idle air control valve connector for LT1, and LS1 applications. Mar 8, 2023 · Before starting the engine, use a small screwdriver to check the position of each idle mixture screw. Cranking open the throttle stop set screw doesn't seem to be regarded as a good thing with an LS1. Learn more. Nov 25, 2008 · if you clear the pcm (unplug the battery) then start the car with the accelerator pressed for a few seconds, it should bottom out the iac valve and learn how to idle again. I would expect an OEM ECU would use that to prevent idle control from activating if the vehicle is moving. This has been plaguing me for over a year and I can't seem to nail down my issue with idle quality. A stock engine, a good steady vacuum at idle speed would be 15 - 19". #17 · Feb 22, 2018. 57 V at idle with a 65* F ambient conditions, and the IAC counts stay that way for a long time while warming-up the engine; Desired RPMs at the ECT/ambient temperature is 950 RPMs, and the RPMs gradually step down to 800 RPMs at operating temperature. Hey folks, I'm creating this thread so I have somewhere to go in a few days when I start trying to tame the idle on a friend's LS1/t56 in his Mazda RX7. Just make sure you adjust the idle speed screws exactly the same amount so the exact same amount of transfer slot is exposed front and rear. Package Includes: 2pcs M4-12mm, 2pc M4-8mm, Open Loop Idle Fueling The VCM Editor>Edit>Engine>Idle>Base Running Airflow>Idle Airflow vs. So I have an issue with getting my car to idle. ShowNoMercy;461370 said: this is the internet, take it to seriously and you won't get out alive. 2 days ago · JEGS 555-14531 Idle Air Control Motor and Throttle Position Sensor Features: Fits GM/Chevrolet LS series throttle bodies. I did the idle relearn helped a little. put key in ON position Unplug IAC Turn key off Now start the car and you most likely will need to hold throttle to keep car running, set the base idle so the engine is just idling, then turn key off. Perhaps yours is slightly off and just needs to be relearned. Stock A4 idle is 550 in D / 650 P/N an M6 is 800. B. Dec 22, 2016 · you won't see tps percentage at idle at idle, you should see it when you tap the throttle however. 3 small block engine from General Motors used in cars from 1997-2004. 18-09-2008, 07:02 AM. 2005 GTO M6. Except It does some funky things when idling. 7 aluminum-block V8. 3-Tune the IAC counts between 30 and 60 by method mentioned above. Cracking the idle throttle position and drilling the hole are two different things. Or to be more accurate, I am having trouble getting the IAC set at 3%. Feb 23, 2015 · Ran from cold to 220 no back firing at all till it reach around 220 and it backfire here and there. Wait 30 seconds, key off. Nov 1, 2016 · 11,759. Although it's hard for us geezers raised on carburetors to swallow, EFI really is a different animal. 3- Head out under the hood and unplug your (TPS) and Idle Air Control Valve (IAC) 4 – Head back into your car and turn your KOEO, wait 30 seconds like this Feb 17, 2012 · 12 posts · Joined 2012. Diameter: 10mm (3/8") Buy in monthly payments with Affirm on orders over $50. hpt. They have an LS1/LS2 flange that can be mounted on aftermarket LS1 manifolds with a 90mm opening as well Jul 11, 2019 · 07-11-2019, 07:00 AM. #4 · Sep 30, 2010. you may need to have the tune adjusted for part throttle driving. P. The LS6—introduced for the 2001 Chevy Corvette Z06—is also a Gen III 5. This locks the ECU in idle. 98 Formula. This might seem way too simple, but for a carbureted street engine this is the most important tuning step you can make because street engines spend a majority of their time Sep 17, 2008 · Re: problems with idle after cam install and tune. As i posted before , i finished my head/cam/lt install. When he had the motor rebuilt it had issues with idle and Oct 19, 2017 · The LS1 engine is a Gen III 5. the car ldles great at 950 and doesnt stall when shifting in to drive but when i give it any throttle it Open Loop Idle Fueling. Whether you have a LS1, LS2, LS3, LS6, LS7 or anything in between, Whipple has a front entry SC system that will work for your hot-rod, sand rail or Mar 12, 2010 · Stock, that voltage should be . #4 · May 7, 2008. #4 · Feb 17, 2012. I’m sure I need to change some more settings, as when I start it, it LS1 Idle Issues. 3L, 5. it should be doing this on its own over time though. Open hole in throttle body -OR- unplug TPS and open throttle body stop. your iac could be lazy, for one. Stay away from the iac seat, where the pintle seals against. Allow it to idle shortly and do a few quick stops from 20mph. 45v- 0. 1500 I agree is too high. Hi all, What idle speed should a stock LS1 have in both Drive with the brakes applied, and in Park? My VU SS is currently running at 650 rpm in Park which feels smooth, but in Drive with the brakes on it’s running at around 550 rpm which seems too low as it’s causing excessive shudder. IMO you don't really need that special base plate. Next step is to hit the street and dial in STFT and LTFT ,PE. Make sure Aug 1, 2001 · Now start the engine and set the idle speed to around 850 rpm with the idle-speed screw. 1998 most cars did not have an idle adjustment screw on the throttle body. I to adjust the TB screw 1/2 turn to make it idle around 800-900 rpm. 54v (+/- . Jun 5, 2016 · When it comes to twin-screw systems, there are few choices for vehicles with rectangular-port heads; most are designed for earlier, cathedral-port engines (LS1, LS2, and LS6). Remove the key then plug the sensor back in and start the car. Certainly you should not plan a long road trip with it untuned. 5 volts at idle and 4. to zero the throttle position sensor you need to unplug the sensor, turn the key on, wait a few seconds, turn it off and replug the sensor in. take baby steps 1/64" at a time. If the number reads zero then slowly turn the screw OUT (counter clockwise) until the IAC Steps reads between Holley Sniper How to Set The IAC Idle air Control in 5 minutes or less. May 16, 2009 · Idle Stop Screw. 99 plus shipping. Turn the screw counter clockwise so the screw backs off so the blades can close up so it idles around 900-950. let it idle for a few mins, it will readjust itself. When it first idled it started right up and went to 1000 rpm, and idled there great. temporaley drill a small hole in the throttle blade and turn the idle up by ajusting the stop screw see if this helps dont worry bout the hole in throtle ya can always solder it up later with solder iron. i would say ya need a high stall. 6,636 Posts. i have a BBK 80mm TB and there is a idle set screw. Mods in signothing engine wise other than complete exhaust. 3L. While the LS6 emerged from the factory with more power than the LS1, both engines can make the same power with common upgrades. horsepowerinnovations. GTO and later LS1/6 engines - there's a little Allen screw that adjusts the stop on the throttle blade. 0), in addition to most aftermarket throttle bodies for LS motors. Go back to step 1. 7L aluminum-block V8 car engine that first appeared in the 1997 Chevrolet Corvette. The Edelbrock #3864 Victor LS Series 90mm Throttle Body is Designed for modified Gen III-IV engines in high-performance's street or competition applications. Then it says to check the voltage and adjust it with the adjustment screw and recheck it. Bob D. The only way I know of changing the iac pintle length is with a GM tech 1 or tech 2 scan tool. Used to install and secure your throttle position sensor and idle air contral valve to your throttle body. That helped a whole bunch. The most hated, make the most power. This depends on the size of your cam, the lift, and the duration. . If you've found instructions out in net land, be aware they might be good or they might be bs. Keep adjusting your idle speed screw as necessary to maintain specified idle speed RPM. 2007 Dodge Ram 1500 Hemi. These are the same products used by GM on factory harnesses, and the leads are GM color coded. 5 5. 2) With the key in the ON position, adjust your tb. I added the FAST intake, NW TB, MAF, and 42lb injectors Sep 29, 2013 · 5008 posts · Joined 2008. It was super easy and only too Oct 5, 2022 · Hi all, i am having a issue with my ls swapped 1984 z28 stalling when coming back to idle in park and in gear. 7L LS1 is the original Gen. It's got stock 241 heads, stock compression, but ARP Feb 20, 2014 · if you have a wideband personally i would never use closed loop @ idle. Only way to tell 100% is to take it off and slide a straight edge ruler along the entire runner side. Throttle body #3864 includes a LS1 stock-style TPS and IAC. If the number reads zero then slowly turn the screw OUT (counter clockwise) until the IAC Steps reads between Dec 4, 2020 · Backfiring. Big Bruno · Registered EBay headers LT4 KM, LS1 Lid. The LS1 engine specs and information here is for the stock 5. For some reason when my 98 worked the idle was around 900-1000 rpms even with a Frost tune. Glue the intake gaskets to the cylinder heads, using Permatex® Ultrablue Sealer. If your engine has a big cam and must idle at a higher speed, that's OK. 8l with a sloppy stage 2 cam, pac 1218 springs with a speedmaster ls6 style intake with a stock dbc throttle body, a th350 with no vss hooked up and a 0411 pcm. Once engine is running and at operating temperature turn ON Idle Set Mode. 2004 torrid red with red interior A4 GTO (1 of 499) Jun 28, 2012 · Lt1 Idle issues. LS Idle Air Control Valve & Throttle Position Sensor Bolt Kit Used to install and secure your throttle position sensor and idle air control valve to your throttle body. Trick flow 220 heads. C'ya. To decrease idle speed, the PCM commands the IAC valve pintle to extend. Wait 30 Once engine is running and at operating temperature turn ON Idle Set Mode. My Projects: (for 1994-1995 LT1) :: Aug 15, 2019 · In this video I continue working with HP Tuners on the idle tuning issue I am having after the cam swap (if the engine is cold it dies when I shift it into g Mar 23, 2008 · Older LS1/6 engines - drill the throttle plate to admit a little more air at idle and smooth things out. Mechanically similar, GM’s LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Aug 25, 2011 · batboy. #5 · Sep 29, 2013. Jan 10, 2013 · As Mystery said could be TPS, or maybe IAC, vacuum leak or needing a tune-up. anyone have any good Apr 21, 2009 · They want to be around 32 (30-35). i'm afraid you're going to need a tune for adjusting your RAF (Running Air Flow or could May 23, 2008 · Hey guys,, need help 1 more time. Your tune may need some adjustments as well. 01 LS1 Harness and ECM in a 240 - Mods are. Well i got my CPU back. Log - 9-10-2022 v29 ws. It is a 4. Jan 1, 2007 · 1792 posts · Joined 2004. Only suggestion I have in setting the idle adjust screw is the 95 service manual @ My Files. However there is an idle air adjustment screw on the 04 throttle body. After checking timing and other variables, a small hole is drilled in both front throttle blades, this allows the idle screw to be backed off slightly, and covering that transfer slot, which enables the idle mixture screws and makes the carb run off the idle circuit as intended, then proper A/F ratio can be adjusted with the idle mixture screws May 19, 2011 · Chronicles of idle tuning LS1/big cam. What do I need to do? -2. the iac is at the bottom of the throttle body, i believe held just w/ 2 screws. You need to make sure your target idle speed is sensible. Adjust a little at a time, then turn each mixture screw 1/8 - 1/4 turn lean (clockwise). Disconnect power from the ECM for at least 10 seconds to clear codes (in case any are present) and reconnect the IAC electrical connector. Some 98 cars do have the idle throttle stop set screws. It has to do with the throttle position sensor. Compatible with GM LS series engines with Drive by Cable Throttle Body 1997-2014. Save Share. ) Stock A4 should run smooth at 550. I know this has been covered in may different ways, and I've searched around but haven't found a fix. That idle will relearn itself without doing that. Fast 92 throttle body. Slowly turn each idle mixture screw clockwise (in) and count the number of turns until it lightly seats. Figure 3. spray it clean with gum cutter or carb cleaner, reassemble. 605 113lsa. The IFR and IAB should be sized to provide the correct part throttle air fuel mixture. On the throttle body how high is the screw? Have you tried using some carb cleaner to check for vacuum leaks? Have you tried the disconnecting the MAF yet? Sep 2, 2022 · LSA on 383 LS1 - Idle surge. On the advice of a tuner far smarter than I, avoid the temptation to over advance idle spark in an attempt to smooth things out, even on an LS1. I have a 99 TA M6 with a EPS 234/246 cam, 243 heads, FAST 102, 102mm Nick Williams TB, 85mm z06 MAF, and 42lb green top injectors. Mar 5, 2021 · If no go to step 5 3. Nov 11, 2016 · Holley HP EFI LS1 idle surging. Jul 18, 2006 · svede1212. Vengeance racing vrx5 cam 236/238 . 7:1. Aug 16, 2008 · So get whatever type screwdriver/tool you'll need to adjust the blades down. It is underneath the tab where the throttle blade rests. 50 volts may be the final opening voltage on one car, while 4. Spark dominates the idle speed control because it's Sep 16, 2013 · the IAC opens a FIXED amount for initial startup (determined by temperature), then slowly closes itself. Tuner in Training. Tune - 9-2-2022 Stroker ID1050 V29. Could need cleaned or it may have an issue and is hanging up. This number needs to be within 3-10 at warm idle. 1:1 instead of 14. When I open the throttle blades more the engine revs high and the IAC is at 0%. After about 10 seconds it finds normal idle. If yes go to step 6. Set Idle Correctly. 22. #1 · Nov 22, 2007. Mar 10, 2009 · Stock values are normally in the 20-30 range at hot idle. even on my small cam it idles WAY better if i force it to open loop idle at ~14. Helped me before and that's where I would start. 2007 Ducati 1098. This is an older thread, you may not Oct 4, 2008 · Originally Posted by 69lt1bird. #11 · Apr 16, 2010. As the throttle plate opening progresses from there, the percentage of opening increases with the progressing voltage. 05-09-2011, 10:02 PM #5. 8 or 5. ID1050 Injectors running on a 0411 PCM Sep 21, 2008 · 17-09-2008, 11:29 PM. This is a stroked LS1 with a LSA supercharger, over driven. 8, 5. 5 at WOT. Verify TPS voltage is 0. my lt1 seems to want to idle around 1300-1500 rpms. i went over the whole motor for vacuum leaks and found nothin. He hired my services to tune the engine and so far we've got VE and spark tables fairly dialed in. My hole wound up being 11/64". 06 duramax. 3) Turn your key to the OFF position. you might want to just remove the throttle body then remove the iac. Attach the M. 601/. ECT table is like a software choke that is used to control the mixture at idle when the engine is in open loop. ID1050 Injectors running on a 0411 PCM 5) Adjust the idle stop screw so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in neutral (manual trans). Back to the Tech Page Jun 15, 2004 · Just adjust the idle speed screws to get the idle speed you need. an 1100 rpm idle isn't normal. Compatible with GM LS series engines with Drive by Cable Throttle Body 1997-2014; Package Includes: 2pcs M4-12mm, 2pc M4-8mm, 4 washers; Not needed for Drive-by-Wire throttle bodies May 20, 2010 · 2-Set desired idle RPM. It doesn't matter how many turns out they are as long as the part throttle operation is correct. With my idle screw cranked all the way up (highest idle) the lowest I can IAC Position is around 20%. What I am finding is that when I adjust the throttle blades to get the IAC near 3% the engine surges. The directions I got with the TB says you need to put the key in the on position and check the voltage and it should be 0. 97-98 LS1's used a paper water pump gasket. You will be amazed at how much 1/64" effects the IAC counts. the stock lt1 is programmed for about a 1200rpm idle on cold start i think, and this is what it drops to, very slowly, after the initial position. effective area (not exactly sure how to ‘tune’ this correctly so assistance would be appreciated…) 5-Tune the IAC steps vs. Don't drive it much until it is tuned. don't ask why), flip it over, and use that to adjust the airflow at idle. Cammed cars normally higher. E85 racer and E85 carb builder. A. Jump to Latest Follow 21 - 34 of 34 Posts. On my 95 LT1 I installed a new opti, did my intake gaskets, new PVC valve, several new chunks of vacuum hose where old was dry rotted, deleted my air pump and associated check valves. yb ek ey go dm zg nt ay fa sw