I have seen more trouble w/fuel pumps than anything else on these cars-it won't set a code, only a scanner will tell you if fuel trim is off. With that many miles I would toss a pump in it-I had a early 90s TBI Cavalier brought to me once, it had been all around & no one could figger it out. Fuel pressure spec'd @14psi, car had 13psi. I guess most guys thought that was OK, but the car wouldn't go over 45mph. Ran perfect otherwise. New pump & it was good to go. Brian
