Hello all. I hope someone on here can help my with my problem. I bought a 91 grand am( 2.5L TBI, auto) this past summer to communte to work. Great car until it started acting stupid. The car runs great once I've gotten it started.
Ok here is the scoop. Car would start and run great until one day it started having trouble starting. Sometime it will start right away and sometimes it just won't start if it has been sitting hour over 2 hours. If I go outside and start it every couple of hours it will fire right up everytime. However if I leave it sit for 3 hours it might now start. If it does start its after trying on and off for 10 mintues untill it finally decides to start. I've had morning that is just would not start, but it would start in the evening. I've also read the troubleshooting codes when it won't start. At times I get 33, 34, or 35 and sometimes no code what so ever. It just puzzles me to no end
...If someone could PLEASE help me get this care going 100% reiable it would be awesome
Below are my efforts in an attempt to resolve the mystery problem:
1. checked fuel pump, everything checked out
2. replaced the computer
3. tested MAP sensor @ autozone, ok
4. replaced IAC
5. visual inspection of vacuum hoses