Lt1 high idle. In gear it's idling around 900 rpms.

Lt1 high idle. Save Share Maintenance Tips, How-Tos and Repair.

Lt1 high idle. Come join the discussion about performance, specs, builds, conversions, swaps, modifications, troubleshooting, maintenance, and more! Show Less . Watching this video will help you diagnose to see if it is time to replace your idl High idle issue. Thanks I cannot tell you how nice it is to have 2 of everything now, saves alot of money when things break to have a spare. He then noticed that he thought I had two injectors switched. Seems to me you still need to close the throttle blades, letting in less air. 87Lump Discussion LT1 stays in high idle in park,but good in drive mode. Also if driven when cold - no issue. . Stock values are normally in the 20-30 range at hot idle. 1. I was not using the high voltage section, rotor was still installed, nor serving any purpose, but the cam position sensor was feeding an aftermarket ECU, which electronically fired 8 LSx coils. I got an ALDL cable to check 95 LT1 high idle when cold. 0L swap will fire up and idle at ~900 Rpm for 4 seconds, then cut down to ~725 RPM and idle (with a small amount of surging until warmed up). Pulled vacuum hoses, the only one that increased the idle was the small hose connected to the throttle body on the passenger "high idle" is around 15-1800rpm. I've checked for vacuum leaks and there are none. View Full Version : 1993 LT1 High Idle Issue HELP! Deviant93Z. Car starts fine. Get one of those cheap inferred temp sensors and read each cylinders temp at exhaust My LS2 6. 24 posts · Joined 2023 Add to quote; Only show this user #1 · Jan 26, 2023. Tuning a big cam (GPI Stage 3 226/246 . I replaced the IAC. I can't feel a miss but can still hear the exhaust make a slight "pop" occasionally at idle. Urgent . It is like the computer is not responding to the high idle. the same thing happened to me except that when my engine was cold it would idle fine and run awesome but once it warmed up it would idle high and get really hot really fast 94 Z28 hardtop, A4, 3. Thinking back mine started to have ruff idle but would clear at speeds. I fixed this issue recently on my 93. Now I am trying to bring the idle down some so that I can hear this cc305 cam a little bit. not sure but if your pcm wants it to idle at 1200 then it will make it idle there even if you try to lower it. Roughly a month ago it began to misfire every so often. I've been searching the forum for I have a 1997 Camaro SS LT1 that is experiencing rough idle/stalling problems and various electrical issues. I have done the following: I investigated for an intake When it starts on the second crank, it will usually idle high, around 1400-1600 RPM's, and take about 30-45 seconds to drop to around 800-1000 RPM's. 73, headers, Magnaflow, Moroso CAI, '95 Stock Lt1 with 67,000 miles. 639/. bigtoyz. Converted to 24x with torqhead kit. My 1995 Camaro LT1/T56 combo transplant in a 1984 Jaguar xj6 is suffering from high idle. Not sure if you could get away with doing that. No Codes. M. I changed the plugs, the wires, exhaust manifold gaskets, fuel pressure regulator, mass air flow sensor, 02 sensor, idle air control valve, etc. Jump to Latest 1K views 2 C4 Tech/Performance - Lt1 high idle - Just did the trick flow heads and cam kit andstarted for the first time and it idles around 25oo rpm. If the idle speed is lower than Worked - got the idle down, brought iac counts up to 10 on relatively warm idle, and raised map pressure from 33 to 37 kPa. It does a little better with a load on it in gear but still isn't right- jerks and what not. Take a close look at the PCV hoses on the passenger side of the throttle body, if that appears fine then check out the components on the throttle body. When driving, when I I was able to leverage the 2002 Express Van L31 flash for my 24X system because it uses the same OS as the 2002 Camaro LS1. In gear it's idling around 900 rpms. Started off week with car running really bad. Searched for vacuum leaks. Jump to Latest 10K views 40 replies 12 participants last post by Firehawkws6 Aug 1, 2012. 09-04-2010, 08:51 AM. My data files are saying i'm getting 35 Kpa for vaccum. I have a 1995 Trans am with a built LT1 6speed. The sweet spot for me on the TPS voltage was between C4 Tech/Performance - Another LT1 High Idle issue - Hello all, I have a 92 LT1. Shortly after, I find my idle now is running about 1600-1700 RPM - for no 95 LT1 high idle when cold. C4 Tech/Performance - LT1 ‘92 intermittent high idle issue, probably electronic or sensors, need help pls - Hello everyone, I've been trying to solve this problem for over a year. Followed the forum's advice and replaced the IAC, cleaned the throttle body and set IAC according to the manual. Mostly noticeable in Fourth Generation Pontiac Firebird (1993 - 2002) 95 LT1 high idle when cold Car is 95 Corvette with LT1 and 4l60e. drove it about a mile or so turned it off and restarted it and the idle went back down to 900 any help would be appreciated, High idle is usually the result of unmetered air entering the engine -- a vacuum leak, defective idle air control (IAC) valve, or faulty throttle position sensor (TPS) are the usual suspects. I replaced the pig tail as well, still no fix. I don't see a MAP reading that would be good too. So if you know me from other LT1 forums, you probably already know the scoop, but if not, here's the problem: I had a 2+ cylinder misfire in my LT1 in a 1995 Z28 A4. No matter what I set the desired and max idle to, it stays around 1400rpm in p/n and will drive itself up to about 10mph when in gear. Save Share Reply Quote Like. But at some point while i'm out driving, i'll let off the gas to coast and the car maintains speed Pop it in Neutral and the RPM is High idle 383 stroker build. C4 Tech/Performance - 1994 LT1 Corvette With High Idle - Need additional Solutions, HELP!!!! - Hello everyone and thanks for taking the time to read my post :). Other times it will turn over within a second or two even if the engine is warm. I've researched the forums for common GenV idle tuning principles, and I got it to at least idle with zero pedal, but it's still idling too low (currently 650 vs my target of 850) and stalling easily when "returning to idle" during a clutch in. Some of the L31 parameter can be copy / My car started doing a high idle as well. Since I've had it, the engine has bogged down a bit when first put into gear (somewhat intermittent, may be tied to engine temp). Finally found someone who could read OBD I and discovered one O2 sensor died. One day I was I just got the t/a insured so took it for a ride today. The ‘92 Vette LT1 Manual Transmission runs well and occasionally has problems with high idle, running at 1500, sometimes close to 2000rpm. And i got my complete spare lt1 for 300 bucks. Still it is idling high. Service ASR light is on now. A forum community dedicated to all LS1 and LT1 powered vehicles owners and enthusiasts. but if you do that I believe you will have to readjust the throttle position censor. When I replace it with the old one, same result. I just replaced the heater hoses and the water pump and when i got everything back together on my 93 trans am and started it up, it's My 93 had a high idle and it was a combination of a vacuum leak at the FPR and I had to take off the IAC and turn the pintle under a 1 1/8" and reinstall as new. you can lower the idle by adjusting the set screw on the throttle body where the throttle rest. DTC P0507 Idle Speed High Circuit Description The Idle Air Control valve is a PCM controlled stepper motor located on the throttle body. my obd 11 scanner doesn't read the 1995. Announcement High idle issue. Engine / Drive Train. Do I take to mechanic shop to read code?Help me out thx . Stock. Has headers and muffler deletes. It was like the I've researched the forums for common GenV idle tuning principles, and I got it to at least idle with zero pedal, but it's still idling too low (currently 650 vs my target of 850) and Have you checked the throttle cable operation where it connects to the throttle body. 97 LT1 6-speed - Sitting still, rev engine and throttle returns to idle (about 950 RPM) just fine. The car runs great when running, i've pulled all the vaccum lines off and plugged them and i'm still getting a high idle. Almost feels like a miss except that there is absolutely no indication of missing at normal driving conditions (as there was when I was having Car is 95 Corvette with LT1 and 4l60e. But at some point while i'm out driving, i'll let LT1 | LT4 | L99 Engine Tech C4 Tech/Performance - '95 LT1 Corvette - High Idle - Odd week with this car. I was very careful during that step so I don't think it was that. LS1 world, I have a 87 monte carlo ss with a LS1 by street & Performance (mena ark) I started up the other day and the idle went up to 2500 and stayed there. 94 camaro z28 stock lt1 hooker lts 3 inch exaust into flowmaster muffler, k&n cold air, msd opti, msd blaster coil, 3. I thought it was plugs n' wires and it wasn't, coil is a year old, blah blah blah. Check your ignition high voltage section for proper function. Jump to Latest LT1 Hotcammed, Stage 1 shift kit, 3000 Rev-Max stall converter, Hooker super comp long tube headers, True dual exhaust ,CAI, 1. Used some high temp RTV sealant and high idle is gone! OutCast. Don't buy any opti other than GM, Delphi, or Msd. I adjusted the t body back and it didnt help im lost this is my first project car so dont really know what to do here any thing will help High idle after tune. Jump to Latest Follow 41 - 50 of 50 Posts. Since I can remember engine has had intermittent higher-than-normal idle on a hot engine after cold start; I have a 95 that does the same thing. 169 posts · Joined 2011 Add to quote; Only show this user #1 · Jan 20, 2012. To decrease idle speed, the PCM commands the IAC valve pintle to extend. I don't know when things like the IAC, TB or MAF were cleaned, I'm searching for those Your balancing TB air flow and IAC air flow, since the IAC air goes through the intake plenums to reach each cylinder Vs the TB only letting air into the front, it's critical to have correct IAC valve operation for smooth idle, no my lt1 seems to want to idle around 1300-1500 rpms. C4 Tech/Performance - Help me with my LT1 high idle, out of ideas - Back story: I bought a 92 in July and have been slowly bringing it back to working order. I have car Hey all. it has an aftermarket throttle body and the nitrous wires If the idle is too high (compared to the idle speed programmed in the PCM) , the PCM will try and close the IAC passage, by dropping the IAC counts. When the car was put away it had half a tank of gas in it (gas is from october) and 2 things of dry gas (from earlier trouble shooting). Always consult a professional repair manual be Idle surging after cam install V8 LT1 Engine, Exhaust, and Bolt-Ons. Jump to Latest 954 views 4 replies 2 participants last post by Tqd7mb Jan 29, 2023. If RPM is higher than expected, it likely means too much air is getting in and the IAC is going fully closed and idle is still too high. Reset IAC. AT. High idle problem. Jump to Latest That way you'll know if your losing low or high res signal. So, its not intake gaskets, its not egr gasket, its not tb gaskets, its It's almost a sure bet the idle speed control motor (IAC, idle air control) is probably bad. Come join the discussion about performance, specs, builds, conversions, swaps, modifications, LT1 idle issues. 2. turn off then start back up idles fine My LT1 engine was totally rebuilt for high RPM (7,200+) operation. It should be closer to 0, but the High idle is usually the result of unmetered air entering the engine -- a vacuum leak, defective idle air control (IAC) valve, or faulty throttle position sensor (TPS) are the usual suspects. 6%. If it isn't surging at idle, the idle will still be very rough and the car shakes a bit. My first big cam LT1 tuning experience too, so big learning curve. C4 Tech/Performance - 95 LT-1 recently developed rough idle - Title says it all. If full of corrosion, oil, or coolant, your opti is probably on it's way out. I didn't use stability or anything like that. Jump to Latest 5K views 49 replies 5 participants last post by Mclovin Jul 19, 2022. Plugs, wires, cap, & rotor. I could even see the black soot on one exhaust. Problem went away on its on - believe it was bad gas (probably water in fuel) that was resolved when new gas mixed in. High idle lt-1 94 trans am. Don't currently have the money to pay LS1 high idle when cold. When in reverse turning the wheel is prone to cause The car is a manual and always drove fine so I never really bothered to look too far into it. Cammed cars normally higher. High Idle. Anyhow, I've read many different forums of what could cause a high idle, but let me explain my problem first (before I try anything else). If the lever on the tb isn't closing all the way to the adjustment screw your idle will be high. Take a close look at the PCV hoses on the passenger the IAC is jacked wide open but you're above target idle, probably because your tps needs to be 0% at idle (it isn't trying to control idle at all), your TPS is 1. Homepage: Garage: Wiki: Register: Community: Calendar: Today's Posts: Search: #Camaro6 CAMARO6 Just got the car back a day or so ago and at first the idle was spot on perfect at 850rpm, C4 General Discussion - High idle TPS issues 1994 LT1 - I replaced the throttle position sensor on my 1994 LT1 and now it’s stuck idling at about 1100 RPMs. I have OBDX Pro VT and tunerpro RT for tuning. Now it will still idle high after being driven, but if i I'm experiencing an idle that is way too fast at 2500 RPM. Mclovin Discussion starter. 89 posts C4 Tech/Performance - Help me with my LT1 high idle, out of ideas - Back story: I bought a 92 in July and have been slowly bringing it back to working order. i went over the whole motor for vacuum leaks and found nothin. The stepper motor drives a valve pintle which protrudes into a passage that bypasses the throttle plates. Ran fantastic before Opti died. Fast Idle Question. LT1 | LT4 | L99 Engine Tech. Come join the discussion about performance, specs, builds, conversions, swaps, modifications, troubleshooting, maintenance, and 6,7,8,9. I got an ALDL cable to check Now she idles at 850-875 with a target of 800. Good day, is there any way to adjust the high idle when LT1 | LT4 | L99 Engine Tech. So now the car is My 1995 Camaro Lt1 z28 is idling in park around 1400 and 1500 rpms. 1 C4 Tech/Performance - 92 LT1 - High Idle after IAC Replacement - I was experiencing a high idle (2,000 rpm) after the car was driven for a bit. like over 1,000 rpm. By chatting and providing personal info, you understand and agree There may be enough play worn in the pivot that it is causing air to pass thru causing the high idle. Adam88 Discussion starter. You can take it out and clean it, make sure the passages (plunger and seat) are clean. Tqd7mb Discussion starter. B. 95 lt1 FWIW I blocked off the EGR on mine but it was in a '33 Willys. As warmed up, at speed High idle The real problem was getting it through CA smog test! They would drive it on the rollers, Having some issues. 639/112 +2 ICL) LT1 C7. 96 posts · Joined 2022 Add to quote; Only show this user #1 · May 15, 2022. well my IAC, looked like ASS, i swapped in my old one from my F-body LT1 and its perfect now. Some of the other members may say differently, but I wouldn't worry about the high idle as long as it comes down to normal. Put With an aftermarket TB, it is a good idea to monitor the IAC counts when adjusting the throttle stop. When idling in drive or reverse the engine idle is approximately 500 rpm. 1992 Chevrolet Corvette LT1 idling at 2000 rpm in park and neutral, 211,000, LT1 350, Yes, new Idle air control valve. If My 1995 Camaro LT1/T56 combo transplant in a 1984 Jaguar xj6 is suffering from high idle. Save Share Maintenance Tips, How-Tos and Repair. You are browsing camaro6. which I think is too high. Don't currently have the money to pay Throttle position sensor High Idle TroubleshootingDisclaimer:This video is not meant to be a definitive how to. Opti was an OEM AC-Delco vented type. It idles at around 1400-1500. Jump to Latest A forum community dedicated to all LS1 and LT1 powered vehicles owners and enthusiasts. 6 GMPP Rockers, and a bunch of other stuff I don't feel like typing LTXTECH Forums > LTX Performance > LTx Engine Tech > 1993 LT1 High Idle Issue HELP! PDA. close your IAC counts at zero and idle high with desired idle lower=air getting into the engine. If IAC values are way high, the IAC is trying to let in more air to allow it to idle. What can I mine was to high but a bad TPS censor went bad. Was not doing this before. I have done the following: I investigated for an intake leak, and didn't find one -- I replaced the intake gaskets again for good measure and torqued everything down to spec. After warming up when sitting at a stop, the car starts idling rough (automatic transmission) . could tps sensor be bad?service engine light come on. Actually almost too much when it is warmed up. Please help because my car doesnt rumble anymore because of this high idle and my car is jerking everytime i put it in drive because of If got an interesting case hear (1994 z28 6mt) car loves to idle high! First start of the day A forum community dedicated to all LS1 and LT1 powered vehicles owners and enthusiasts. Runs fine. The commanded IAC counts will just sit where ever the end up and not come down to bring the idle down. 1123 Views 6 Replies 2 Participants Last post by CKJ, Mar 23, 2008 Jump to Latest 8. The idle surging will usually go from around 800 to 1500. Also I don't have access to a scan tool at this time. Come join the discussion about performance, specs, builds, conversions, swaps, modifications, 52mm BBK high idle. He swapped them and the idle seemed to smooth out and actually raised the idle rpm in park. The IAC cannot gain control of idle. 23 gears, rare red insert seats, 2002 ss wheels. C4 Tech/Performance - Another LT1 High Idle issue - Hello all, I have a 92 LT1. The car also has some issues starting it usually will crank for 5 seconds or longer before turning over. 3. T. In this video, you will learn 4 symptoms of a bad idle air control valve. will have eratic high idle on first start. Sort by Oldest first Oldest first Newest first Most reactions. You can also take opti apart and inspect the optical section. When it's cold, it will stay in high for 1-3 minutes.