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 Post subject: Can't hold RPM steady above 2k in neutral
PostPosted: Fri Sep 22, 2017 6:12 pm 
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Joined: Sun Mar 26, 2017 2:17 pm
Posts: 11
Hi guys, I am having a problem where applying increases in throttle are not linear. Meaning I can hold rpm with throttle inputs up to about 2000 RPM but if I try to hold at 2100 RPM the increase in revs will increase above 5000 RPM. TPS is linear and this seems to happen with TPS voltage at .66 volts. .64 volts will hold steady at 2000 RPM, while .66 volts will start out at 2010 RPM according to logs and increase to over 3000 RPM at the same TPS voltage. Carberry speed density, EJ207 V8 motor. I was able to find something strange with MAP sensor values. If you look at lines 110 and 111 on the attached log, the MAP value increases 1.1 PSI with no change to RPM, TPS value or Injector pulse width. Could a faulty MAP sensor cause this??


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 Post subject: Re: Can't hold RPM steady above 2k in neutral
PostPosted: Thu Oct 05, 2017 11:28 am 
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Joined: Thu Oct 05, 2017 11:24 am
Posts: 1
Hi!

Did you found the solution?

My BMW E46 doing the same! If I rev up below 2000rpm, it drop the rpm a little bit (200-300rpm). If I rev up more than 2000, it increase the rpm itself.

The pedal sensor voltage is constant!


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