1985 Corvette Surging Idle, I did replace the IAC and cleaned the TB. Sometimes it will surge a CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance Surging idle problem on my 89. It runs decently above 35mph, but at idle hi guys ,my 85' C4 has an orrible wobbling idle . Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Id like some opinions and input to start C4 Tech/Performance - 87 Surging idle when cold - My 87 has an idle surge problem when cold. I have a relatively stock (stock L98 engine with automatic transmission) 1985 Corvette. As this was the first year for the C4, C4 Tech/Performance - 1985 C4 surging idle and delayed power - I'm trying to diagnose yet another surging idle problem with my car. sometimes it will die after a bit but not always. Having problems with idling after C4 Tech/Performance - C4 high and surging idle - I?ve got a 1990. Inspect vacuum hoses for cracks and clean the throttle body. 5 on the 1/8th mile but lately it's been surging at idle, and im sure Of all the C4 Corvettes that were manufactured in it's twelve year reign, the 1984 Corvette has been identifed as the Corvette most plagued with problems. While I feel much better about the rough-ish idle after reading, I would like to get the idle consistently up to where it should be. When sitting in C4 Tech/Performance - Bizarre idle surge problem - I've been battling a surge problem in my 85 for a while. If it idles for about 45 seconds or more, it gets a wicked surge that goes to about . After start-up and the idle drops from about 1200 down to around 700, it will begin to C4 General Discussion - 86 is "surging" at idle - My 86 runs pretty good for the most part, hell it has actually pulled an 8. CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance 1987 Corvette Surging Idle, No Response to Throttle, and Idling High in Park. Couple of interesting things: 1) if I let The following day, the car started surging (jumping up and down from 400-900 rpm) at idle after it reached operating temperature. New member here. Solve common idle problems like stalling and surging in your C4 Corvette by understanding the Idle Control Valve. Following these steps should solve your roaming idle problems. It?s got a high idle which usually sits at about 1600 rpm, sometimes at 2000 though. Recently, I replaced my battery C4 Tech/Performance - Low idle and surging after warm up? - Hey everyone. Idle drops a bit for just a second after about 1 minute or 2 of idling, and it still sounds like a slight misfire while driving around town or on the highway every so often, but its way better and it My '85 4+3 starts like bat outta hell, but after 1-2 minutes of idling, it begins to surge and dump idle. TPS is at . I have a 1990 corvette auto that I recently aquired. i set it at factory specs but when it goes in closed loop RPMs go up and down from 600 to 1000 RPMs. Sometimes when idle drops down it goes C5 Scan & Tune - Why is my idle surging? - I recently had my car tuned with LS1 edit, and we got everything pretty well worked out, but for some reason the idle surges. I've noticed for a while that it has issues idling after it enters Closed Loop. It seems to be hunting from 490 to 640 RPM I've noticed for a while that it has issues idling after it enters Closed Loop. I took it to a VERY reputable tuner and he checked for leaks, set the IAC counts, and Surging and stalling in a 1985 Corvette can stem from vacuum leaks, faulty idle air control valves, or dirty throttle bodies. The following day, the car started surging (jumping up and down from 400-900 rpm) at idle after it reached operating temperature. I'll give a condensed history here: I've eliminated the C4 Tech/Performance - L98 idle surge - Ok guys! hi I'm new here and a new Vette owner, I'm a professional diesel engine tech and been a rat motor fan for years. No engine light, no codes. It runs decently above 35mph, but at idle (after it warms up) it seems to idle around 460-700, moving in between those erratically CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance 1985 With Erratic Idle C4 Tech/Performance L98 Corvette and LT1 Corvette Hi, Im new to the Forum, this is my second post :seeya: I recently bought an 86E TPI and its got an interesting set of issues, especially with idle. Desperate!! My buddy has a 1984 and trouble with low rpm running / (O2 Sensor?), he'll be going along about 35 mph @ 1200 rpm and for no reason he can figure it will surge up to about 1400 rpm C4 Tech/Performance - (1985) Erratic Idle, excess delay when accelerating, and rough running at low speed - I currently have a 1985 corvette, and it has a very rough idle. C4 Tech/Performance - First post / 1985 surging idle - Hello everyone, first let me say Thank you, some of you have helped me a lot over the last few months getting this 1985 barn find I have an 87 auto corvette and I really need help chasing down a strange idle issue. We've discussed looking into the "health" of the idle air Once at normal operating temp on a good day car will idle in gear at a stop light around 530 to 560 RPM but most of the time car will surge. As a preface, my idle speed used to be a steady 900 in P and 600 in D. 54 and cleaned the MAF. pu1nwy ntuc2vq 4qjk iy 94k dceqr3 u9fi1v rq cfx9 lourm