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Potential Tuner
Solved: Rev limiter problem (cutoff does not work)
Hi,
I have the following problem. The car has been tuned years ago before I bought it, but the rev limiter seems to never kick in. I free revved it and realized there was no limiter (tachometer reached slightly over 7000rpm). But when I read the ECU, VCM Editor shows extreme cutoff at 6300rpm, and cutoff RPM vs Gear 6200rpm for all gears, including neutral (see the attached hpt file). I also tried setting extreme cutoff and resume below 2000rpm, but still no limiter, still revvs happily +6000RPM. I also tried disabling and enabling control method (spark/fuel/etc) and set lower cutoffs for each gear, but it does not seem to make any difference. No limiter no matter what I do.
Any ideas?
_MY_VE_SS_UNMODIFIED.hpt
Last edited by Jakuza; 06-02-2018 at 09:25 PM.
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Tuner
please post more detailed info on setup tear make model etc if it matters or the ECM/PCMsetup engine config boosted or na sorry not being ignorant but we all really need to help each other etc:
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Potential Tuner
It is Commodore VE SS 2010, L98 engine. Naturally aspirated. The engine is pretty much stock except ECU has been remapped a few years back.
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I wouldn't trust the factory tacho. Does it show the same thing in logs?
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Potential Tuner
Ok, found the problem. Cmd Torque Delta and Commanded Torque were maxed out to 8192Nm. This disabled the limiter no matter what the other values were.