20 Most Recent 1991 Ford F150 - Page 3 Questions & Answers

Trans needs rebuild or replacement

Greetings Please visit the site.They give all the details of service or repair manuals.

check your eec wires on driver side under hood for shorts

Hi Steven: Using my fingers and toes I think your truck is about 25 years old. The chances are pretty good that the ignition switch is getting worn. If you look at the key compared to a new one, the inside of the ignition will have similar wear. If you get a new key cut it might temporarily help, but the long term fix will be to either replace the switch or possibly have a locksmith install new parts. Keep that old iron running! Cheers

What exactly is wrong with it/problem?

replace the iac with a new one . fords IAC units go bad. the only other is plate clearance if you have not touched it DON'T just get a new IAC not a junkyard one ....NEW. past that you get into vacuum leaks and computer and wiring problems and a bunch of places you do not want to go .

I would think you were given the wrong fuel pumpIf it was the correct pump ,you would have updateinstructions that would guide you & also answer your question

if it is auto did you remove the torque converter bolts to the flex plate if manual and you are sure that all the bolts have been removed then the clutch shaft may be rusted in the spigot bearing in the flywheel or the clutch hub is stuck on the shaft may require a lever between the bell housing and the back of the motor to get the box to move if all the bolts are out you should be able to move the transmission as if turning it on a shaft a bit . if you cannot do that then you still have a bolt in it somewhere look for a bolt coming back along the engine block

Run normal tests. Spark to plugs? Correct fuel pressure? Timing belt?

Are you getting power

sounds like some of the wires might be out of order or your time is off on the engine

Put number one cylinder on compression top dead center, then look where the rotor on the distributor is put a chalk mark on the distributor housing, then install cap. Where mark and cap lign up to distributor cap terminal tower that is number one. Make sure you follow firing order and which direction distributor turns and put on the rest of wires. (example firing order 1-5-3-6-2-4 is on a six cyl.)

bad starter motor

Fuse position #11 for radio 15 amp fuse

need to know the make and size of the diff go google -type in crawlpedia.com and all the torque settings are listed for each make and size of diff example an AAM 9.25" diff is 63ft lbs a AAm 10.5" is 120 ft lbs ford 9" is (OEM) is 60ft lbs ford 10.25" is 80ft lbs the crawlpedia .com is comprehensive in the torque settings

At what point does it stall? Does it run for a few moments before stalling? If so, it could be a faulty IAC (Idle Air Control).

What you are looking for is a part that looks somewhat like this: ...and is located on the part shown below (most likely on the bottom, just above the label "Bolts"). The mounting screws will be hard to get at - either take the throttle body off or use a stubby screwdriver to get at it. Note that as soon as you loosen the screws, you may throw it out of calibration. When reinstalling the sensor (or installing a new one), you will have to calibrate it. Refer to your vehicle's repair manual for the exact values to measure when calibrating this component.

There are two sensors; one for your dashboard gauge and one for the ECU (computer). In the picture below, they are shown as the Water Temperature Switch and the Engine Coolant Temperature Sensor (or ECT) respectively.

Temp switch - Under hood, center, upper engine area, front of intake manifold, driver side of distributor, mounted in engine block, Coolant temp sensor - Under hood, center, front engine area, passenger side of distributor, mounted in intake manifold, There is no water sensor

Really need to know how many miles are on it and is it an all original Engine...?...Other than that I understand your problem...It surely sounds like you need a heat shield and shim the starter..I know it has happened to a few mustangs and camaros...That is how I repaired them...Be sure and make sure battery has full power....Shimming will line it up more with flywheel. Everytime the starter engages the gear slides out from the starter and connects the flywheel in order to turn the engine over..,then after it turns the flywheel and starts Is when you release the key and the starter gear slides back into starter..If it gets too hot the starter gear will be weak and not slide as easily....So replace or get a heat shield...Since you will be removing starter to install a good heat shield measure the length of the starter nose and the distance from starter gear to flywheel and shim as needed...Remember you have to allow for the starter gear movement ..