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Thread: Low RPM Hesitation

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    Low RPM Hesitation

    I'm using my phone to post this, so please forgive me if this comes out crappy.

    '92 TT from idle on up to about 2800RPMs the car hesitates pretty bad, it seems like its running rich too. Just cruising around town, its not that bad, but if you're in second gear around 2000ish RPMs and give it some gas, it hesitates pretty bad, and from a stop its pretty bad as well...once its at 3000+ RPMs it seems totally fine...

    I havent had a chance to log yet, I'm looking for suggestions and what to log/look for, any and all help is much appreciated, thanks!

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    Member verified Feedback Score 2 (100%) blindmist's Avatar
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    Do you know the voltage of the Alternator?

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    Alternator is new, probably has 30 miles on it? Im sure its within spec

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    Y pipe, or other vac leak would be my first spot to check.

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    Thats what im thinkin, ive never pressure checked fully, i have a ghetto setup and it seems sketchy like somethings gonna blow up when i get to like 5psi ha i dont want to do more harm than good

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    If it is stalling out that bad it should be an obvious leak. Check all of your connections, check the plug on your maf. Give a look at all you can to be sure.

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    Yeah, with as bad as the hesitation is id think with the little bit of pressure testing ive done, i would have found a leak, but nothin major, is there anything i could monitor through logging? I read that thread about about a bad knock sensor causing hesitation, but that threw a code, i dont have any codes, maybe CAS? I've got anew coils, plugs and wires, vac reduction, rebuilt TB...PTU tested fine

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    After thinking about it more, I was wrong. If you had a boost leak it would run ok at lower rpm out of boost and like crap in boost. My bad.

    Try logging, especially the fuel trims, O2's, and timing. Post the logs and see if someone with more knowledge than I can make sense of it.

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    I am just going to say this, if you havent replaced the caps on the ECU, you should start there, and then continue working from there if the problem persists.

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    ECU is good as well, replaced it with known good one, I'll try gettin a log soon enough

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