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post #1 of 1 (permalink) Old 03-18-08, 03:15 PM Thread Starter
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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


please help

ok it was the manifold absolute pressure sensor (MAP)


Last edited by kenman; 03-19-08 at 07:17 PM. Reason: fixed it
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