Silver
04-21-2020, 07:31 PM
So i currently have a weird issue at idle and low load. The engine is bouncing from 800-1000 rpm (1000 - 1200 when cold) idle and when you turn the throttle a hair you can hear it struggle.
The issue persists while driving and barely giving the car throttle (stuttering and the car shaking a little due to engine stutter). But oddly under heavy throttle the car runs perfectly and is
very responsive. I originally thought this was a IAC issue, since i have had a faulty IAC before (around 60k miles ago) and figured hey, maybe it just went bad again. I replaced the IAC today
and the issue still persists.
A little engine history.
188k miles
Top end of the engine rebuilt @ 136k (heads reworked and everything) due to water pump seize and timing belt walk (boom 6 valves and 12 valve guides totaled)
IAC replaced
Heres a video of me starting the car, letting it idle, giving it a little throttle, and showing the hesitation.
Excuse the dirtiness, i just got the car out of storage and having had a chance to detail it.
https://www.youtube.com/watch?v=meVPjZQzNWc
Could this be a vacuum leak? or is it more likely the ECU has bad caps.
Any insight is appreciated.
The issue persists while driving and barely giving the car throttle (stuttering and the car shaking a little due to engine stutter). But oddly under heavy throttle the car runs perfectly and is
very responsive. I originally thought this was a IAC issue, since i have had a faulty IAC before (around 60k miles ago) and figured hey, maybe it just went bad again. I replaced the IAC today
and the issue still persists.
A little engine history.
188k miles
Top end of the engine rebuilt @ 136k (heads reworked and everything) due to water pump seize and timing belt walk (boom 6 valves and 12 valve guides totaled)
IAC replaced
Heres a video of me starting the car, letting it idle, giving it a little throttle, and showing the hesitation.
Excuse the dirtiness, i just got the car out of storage and having had a chance to detail it.
https://www.youtube.com/watch?v=meVPjZQzNWc
Could this be a vacuum leak? or is it more likely the ECU has bad caps.
Any insight is appreciated.