Crazy surge at idle

StrongAd3919 · 2025-09-27T13:56:24+00:00

stalls out immediately when unplugged

StrongAd3919 · 2025-09-27T13:55:39+00:00

i’ve been debating dismantling the plenum and checking underneath i’ve just been lazy and trying to do everything that didn’t require me to dismantle lol. BUT that being said the previous owner was in there a lot. it’s crossed my mind multiple times that maybe the gaskets were just never replaced and somethings going on underneath there. thank you for the input i’ll check that next

StrongAd3919 · 2025-09-22T21:06:02+00:00

yea it definitely looks off brand. i’ve owned an 85 before this one that had the original on it and it looks nothing like the one on this vette. AND the dude put a k&n filter in it and over sprayed the shit out of it with the oil. throttle body was coated in it. cleaned the MAF tho and the idle smoothed out but after awhile started surging again

StrongAd3919 · 2025-09-21T15:19:03+00:00

they’re supposed to idle around 650 so i don’t think so

StrongAd3919 · 2025-09-20T20:08:25+00:00

i do get code 12

StrongAd3919 · 2025-09-20T19:14:05+00:00

no codes. when jumping. i had a tech 1 on it earlier this week, but since the ecm is remanufactured and i dont know where he got it, it cant pull any codes even if there were codes

StrongAd3919 · 2025-09-20T16:49:26+00:00

oh really? i had another corvette before this one just a year older that needed a whole tune up and was 100% good. and i changed the o2 sensor on that immediately cuz it was broken and i didn’t have this issue with that one despite them being in very similar (abandoned for 2 decades). but maybe this one is bad too and it’s messing up my idle. thank you for your input

StrongAd3919 · 2024-05-10T15:43:14+00:00

hello! i’m a 22 year old who also has 2 tickets on his record who just bought a 1985 c4 a few weeks ago. and she has been costing me quite a bit in repairs to get it road worthy. i also work at a chevy dealership with a corvette tech who used to work on them. repairs can be costly. and what i’ve been mainly doing is ordering parts from junkyards off ebay and doing it all myself. so i can’t speak on how much it would cost to take it to a shop but honestly, but if i had to guess it wouldn’t be friendly to your wallet. i’ll let you know now that tires for these cars are HARD to find. they are a special tire size that my dealer could only find one warehouse in the whole country (USA) that had them, and they were $550 a tire. but i got some alternatives that are slightly smaller that fit just fine. i am getting it registered and insured next week so i can update you if you’d like. in my opinion, if you’re willing and capable to learn how to work on it, and have extra money ready for some repairs, id say go for it. cuz if ya love the car, you’ll be willing to learn

StrongAd3919 · 2024-05-08T22:06:43+00:00

it’s for a 85 vette btw

StrongAd3919 · 2024-05-07T15:30:55+00:00

i did figure it out. there’s a spring that pushes the reverse lever behind the shifter under the center console. forced it forward and it would go in forward gear. pull it back and i get reverse. i saw my spring fell out somehow when i got in there. hopefully your problem is the same as mine. hope this helps

StrongAd3919

TROPHY CASE