Join Date: Mar 2002
Location: Austin, TX, USA
Re: 1991 Camaro RPM problem
I'm not sure if GM even considered this feature in 91, but here goes. Many ECMs have a rev limiter with two settings. One setting is used when the vehicle is not in gear and the other is when it is in gear. Perhaps a gear position signal isn't making it's way back to the ECM.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI