3000 rpm rev limit?

kanton1 · June 18, 2002

Last night I noticed that my 8100 seemed to be governed at 3000 rpm while neutral. It acted like the fuel was cut off or the computer did not let the engine rev further. this was even with my foot to the floor.

however, when driving it will rev much higher until the alli shifts

is this normal for the big block?

Thanks,

kyle

ClawSS · June 18, 2002

Mine does the same...I am sure it is a programming "feature" to save the engine from...uh...well...people like me that would rev over 3000rpm in neutral.

CMNTMXR81 · June 24, 2002

GM has been using this feature for years particularly in FWD applications. It's to save the motor from being overrevved while in park or primarily nuetral for instance if you are trying to free a stuck vehicle, shifting between reverse and drive.

Once in a gear, the PCM acts as normal.