1995 Regal 3100 cutting out at 4200RPM

[7purdy]

Just got a '95 regal with the 3100 in it. Car runs great until around 4200 RPM then acts as if its hitting the rev limiter. It does this free revving and under load of driving. Any suggestions?

 

Also would like to know if it is possible to remove the AC pump and if so what is the new belt part number.

Thanks

[Mel87]

These cars do have rev limiters, so that is whats happening. Although I had a 95 Cutlass, 3.1 and if you play with the gas you can get it past the limiter. Maybe mine was going bad who knows.

[tornado_735]

You do have a 4k RPM rev limiter while in park or neutral (and not moving) but it should definitely not feel like that while driving. Not sure what the cause of that would be.

 

And it is possible to remove the AC pump, but AFAIK you can only replace it with a bypass pulley.

[95 vert]

Could be the PCM "thinks" it's in neutral all the time. You need to check and see if when it's in drive, it shows on a scan tool that it is.

I've also found that aftermarket alarms can cause this since they're usually tied into the yellow start wire from the ignition switch to

the trans switch/neutral safety switch mounted on the trans.

[White93z34]

It sounds like the trans range switch is thinking the car is in park when driving.

 

However I've also seen a bad ICM do the same thing.

[white4d96]

IIRC the limiter is somehow tied into the VSS, as if you put the car in neutral while going over a certain speed it will rev all the way to the regular limiter.

[White93z34]

Good point, I forgot about that. In that case I'd say its most likely a bad icm.

[7purdy]

Thanks everyone, I will do some more investigating this weekend with my new W-body education.