need help
Thread Starter
3rd Gear
Joined: Oct 2011
Posts: 3
Likes: 0
need help
Hi my name is rick, i have a 1991 vette w/97.000 org. miles, I have changed out , the ecm,map sensor,egr valve,tps sensor,plugs,rotor cap,air pump,iac sensor,ect sensor,injectors, still runs like crap, runs great for a while , but at slow speeds, it seems to load up,check engine light will come on, have to put in park to clear out and go, need some advise thaks rick
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
The next thing you should do, before throwing any more parts at it, is to pull codes. If you need help to do it, use the "search" here on the forum. It is not at all difficult, and no tools needed. When you have codes, post them and someone with '91 info will likely interpret them for you.
Race Director
Joined: Jun 1999
Posts: 14,924
Likes: 9
From: Merritt Ils Fl
Code 32 indicates an EGR system failure
Code 33 indicates a MAP system failure, High signal, low vacuum.
I do not have a 91 FSM to provide trouble shooting steps. Maybe someone will be along that can.
Give your arm a rest, quit throwing parts at it until you pinpoint what parts are needed.
Code 33 indicates a MAP system failure, High signal, low vacuum.
I do not have a 91 FSM to provide trouble shooting steps. Maybe someone will be along that can.
Give your arm a rest, quit throwing parts at it until you pinpoint what parts are needed.
