If you unplug your iac and drive it around, does it still happen? IF not, its dashpot for sure. I know you said it doesnt seem like dashpot but it sounds to me like dashpot preposition. Basically when you come off of closed throttle, the iac is opened to a specific amount and that amount is too much. I would try reducing the 2 lowest preposition points by 10% and see if it helps. If you have already tried that, im not sure what it would be.
Cause of harsh tip in/out
EEC IV with Quarterhorse and TunerPro RT.
Decipha has my car tuned pretty well. I was complaining about low speed bucking but after playing with dashpot settings and feeling what they do I realise I am not dealing with bucking, but rather more of a harsh tip in issue.
When going real slow, actually any speed…it’s just more apparent when moving slowly, off idle tip in is harsh in a way that jerks the car. When lifting off throttle, or when dashpot lets off, you feel it as well, just not as harsh.
Is that generally a spark or a fuel issue, or could it be both? Is there something I could be on the lookout playing back a log?
Car runs fantastic otherwise.
Cheers.
Decipha has my car tuned pretty well. I was complaining about low speed bucking but after playing with dashpot settings and feeling what they do I realise I am not dealing with bucking, but rather more of a harsh tip in issue.
When going real slow, actually any speed…it’s just more apparent when moving slowly, off idle tip in is harsh in a way that jerks the car. When lifting off throttle, or when dashpot lets off, you feel it as well, just not as harsh.
Is that generally a spark or a fuel issue, or could it be both? Is there something I could be on the lookout playing back a log?
Car runs fantastic otherwise.
Cheers.
1 - 5 of 5 Posts
Thanks man. Will play around with it a bit tomorrow.
Well, whadayouknow. Got her warmed up and went for a slow cruise, pulled over to disconnect the iac and other than a bit of drivetrain loading/unloading I can comfortably cruise in 2nd or 3rd at around 15mph easily.
So I guess I’ll keep playing with the lower rows of airmass until it’s perfect.
Thanks Dwain!
So I guess I’ll keep playing with the lower rows of airmass until it’s perfect.
Thanks Dwain!
Interesting. I've had the same issues with mine and didn't think of dashpot preposition. I'm gonna try to play with it
1 - 5 of 5 Posts
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