No start after switching to OEM ecu
also i see you want a arc cooling plate, i have one i am not going to use, it isnt the right brand but it is freshly powdercoated flat black if your interested.
So the car started randomly running like crap on idle. Revs good, pulls okay but i feel lack of power. On cold start i have to keep my foot on the pedal barely touching it to hold 1500-2k idle otherise it drops below 500, then at operating temp revs drop really low and just bounces back up and keeps doing that. Il try to get a video uploaded. I thought vacuum leak but gauge shows 15-20hg which is good vacc for idle. iacv is new (it is the ebay ones so idk) and tps is also new.
Originally Posted by deylag;[url=tel:11988332
11988332]Seems like you are dealing with an idle calibration issue. I recommend logging your TPS percentage in Evoscan as well as isc steps or percentage. Once you report back then it will be easier to pinpoint the cause.
Not sure if this helps for some video insight. didn’t have time to get back to the evo last day but it’s not as bad as it usually is but on cold start it’s still dropping idle and as you can see in the video I have to give gas otherwise it goes down to like 200 rpm feels like it will shut off. It’s usually much worse than this though.
this is when it’s warmer more steady idle as seen here
Last edited by RallySport9; Nov 8, 2025 at 07:23 PM.
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I know that the cps for will cause no ignition as far as injector pulse idk I but the fuel build up can be from no combustion had the issue with my pontiac g8 although I was getting ignition but legit like 1 mph! Is there anyone i can send a ecu to via ups that would love to ear a few dollars to disable my immo and maybe shut that damn seatbelt bing Bing off i dont listen to my bm I damn sure ain't going to get told what to do by a car lol
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