20 Most Recent 1991 Ford F150 - Page 5 Questions & Answers

You need to replace the compressor with a A/C compressor by-pass pulley, Part Number: 34150 autozone $28

replace them and wires if you have never replaced them there good for about 100k

Check your timing anytime it pops back the timing is usually off.

On the driver side inner frame rail.

Sounds like fuel filter could be stopped up.

apparently the EGR valve gets carbon in ti and causes all kinds of stumbling, bucking multiple cylinder misfiring. The fix is simple remove EGR valve and install 3/4" fender washer with an 1/8" hole in it from a local hardware store about 15 cents with an EGR gasket on both sides and then reinstall EGR valve and it will still function normally and cure the stumble

Charge up the battery with a battery charger or jump start the truck with a good battery. Connect the jumper leads from the good battery to the battery on the truck. Connect the red lead from the + terminal on the good battery to the + (plus) terminal on the truck. Connect the black lead from the - terminal on the good battery to the - (minus) terminal on the truck. The good battery will supply power to the starter motor.Then you can turn the key to start the truck.

Possible cause is the key switch behind the key assembly is not set correctly. When you release the key after engine starts, the key bounces back to ON position but the key switch moves to a position where it did not connect the ignition supply lines.

it is possible that the cat converter is blocking the exhaust system but it would have to be a fairly sharp hill. I would be running the fault codes to check for a problem in the canister system

Look for the ignition fuse!

Power to what? The lighting, stereo or to the ignition switch or from the ignition switch to the starter solenoid? Start with the battery and make sure it is good. Pull a load test. The battery may test good with a multi meter but have no cranking power. From the battery you will have to trace the system back until you find where the loss of power is at.

Have you checked your grounding ?

Look under the hood for a black box that will contain several fuses and relays. The owners manual will typically have an index as to which relay controls what.

No power anywhere is a sign that the cable you unhooked from the battery is bad.

Had a problem like this before and it was the computer..But you could faintly smell something like burnt wires..The computer should be down by the kick panel on the driverside..See if you smell anything on that side