88 f150 starts but stops
I have an 88 f150 with a 300 i6 4.9L and i cant figure out what is wrong. I pulled the codes and it seems i still have no clue what to do.
first i changed the fuel filter, fuel pressure regulator, throttle position sensor, and cleaned the throttle control valve. that did nothing (it may be getting worse).
i changed spark plugs and air filter nothing
the codes are
Code 29-Insufficient input from vehicle speed sensor
Code 32-EVP voltage below closed limit
Code 63-TP circuit below minimum voltage
Code 87-Fuel pump primary circuit failure
i think code 87 is the rear tank, it hasn't worked sense i got it
ok it was the manifold absolute pressure sensor (MAP)
Last edited by kenman; 03-19-2008 at 20:17.
Reason: fixed it