1990 Ford Mustang GT Q&A

1990 Ford Mustang GT Question: Check engine light

when on the interstate my check engine light comes on and goes off every once in a while. I just had motor rebuilt new tranny new clutch new O2 sensors I am lost. The only thing I haven't replaced is the fuel pump and fuel filter. -
Answer 1
if you are changing altitude , the o2 sensors could be reacting to thinner air. it was not uncommon for obd 1 systems to re act like this. have it double checked at a shop to confirm. Roy -
Comment 1
The altitude isn't changing. It started after heavy rain but on the coast here there is no change in altitude -
Comment 2
ok, then you need a shop to pull the code with an obd 1 tester to get the code and diag it to determine the issue. if you give me the code, i can guide you from there. Roy -
Related Items:
good morning all i have a problem with my lovely car while i drove my car on the road the chek engine lamp ON. i went to the agency and he told the problem is in the sensor and they repalse it th...
changed spark plugs, wires, fuel filter put injector cleaner in fuel 3 times dont know what else to do
...spurted out. car has valet? no longer have remote after taking aftermarket sec system off. check engine light has just begun to come on once started but goes off immediately, not enough time to have diagn...
...up to 20 mpg..I normally average about 17-18 and everything was running fine. A month later my check engine light came on and my gas mileage started decreasing by the day. I am currently at 15mpg which is ver...
The engine maintainance light came on while the car was warming up in cold weather. The car hadn't been used in two weeks and was sitting outside with a quarter tank of gas.