i have a 94 buick park avenue that i am on the verg of junking. I can not figure out what is the root problem probly be best to put in shop and let pros fix it instead of nickle and dime myself to death. Any ideas here is my is issues
I get in car to drive anywhere and she will start fine and pur like a kitten. once i reach my destination and cut the car off go do whatever i have to do. Work, errands, etc and come back to start her up she wont start. will turn over but almost like shes not gettin fuel. but i hear fuel pump and shes got plenty of gas.
Only does this when she is up to running temp. and after a drive.
Second issue is not going into overdrive. she will shift smoothly threw all gears but when i hit 55 guess what no overdrive
3rd issue and this may have to do with the overdrive issue but but cruise control will not engage im thinkin mind you i am not tech but i think its because of the high rpms the cruise control light will come one for a second them back off.
i have changed wires, plugs, icm, coils. checked all fuses under dash on driver side and under hood. any ideas??? Gas mileage is killing me and no start condition after driving is annoying.
I went to a highly recommend shop here in my home town and he plugs computer in to read codes and said it was showing iac valve (low temp) and throttle position sensor. I tested the tps with a multimeter and checked out fine.
WHAT DO YOU GUYS THINK?