20 Most Recent 1991 Ford F350 - Page 4 Questions & Answers

Umm wut???

A thought would be to check your filters fuel and air if that doesnt help check fuel pressure your fuel pump may be on the way out.

it might need the fuel cut to 70/30 depending where you live i mean 70 percent diesel and 30 percent kerosene,but glow plugs are always a good idea to replace when these things start to happen,they do burn out.

the type of oil you choose is up to you but if your the kinda person that has to have everything the to code then you should ask the parts guy at a auto store but i ran 10w-40 sae in mine for years with no problems.

ok chech the water hosed in the radiator (both) because if the trans oil is over heat the trans got problems. The trans oil runs trough the radiator.

possibly bad battery get it tested if its good check the grounds to the body and frame is alternator getting power? check voltage

THERE SHOULD BE A CABLE THAT GOES FROM THE THROTTLE BODY DOWN TO THE TRANS MAKE SEE IF IT IS NOT MOVING THEY WILL STICK ON THE TRANS AND THE CLIP WILL BRAKE AT THE THROTTLE BODY

It has got to be the fuses

4 speed uses gear oil @ 4 quarts . 5 speed uses 10w30 synthetic at about 6 quarts.

you do not need a new heater core, you need to replace the thermostat control on your dash. the one that goes from blue to red.

its a 1/2 pipe plug on the side of the housing near the top. use a 3/8 or 1/2 extension (I cannot remember which) inserted into the square hole in the plug. fill to the bottom of the hole. (when it starts to flow out, its full)

first hit the fuel tank with rubber mallet where you might think the pump is. it's best to do this with someone trying to start the truck. if the pump comes on, it is definitely the pump. you can also check at the relay look at the relay and it should show a diagrahm. jump the leads with the switch, not the coil, first check your fuses and check for power at the relay

The battery cable goes on the large post nearest the battery,and all others,except for one small wire made to fit the small terminal.The cable going to the starter goes on the large post on the other side of where you put the battery cable on,the opposite side

I would test the glowplugs themselves...Just hook a test light to the positive side of your battery and touch the probe to the top of the glowplug. It should ground out through the glowplug and turn the light on. If it doesn't then you have a bad glowplug.

According to Haynes Diesel Repair Manual the fuel pump relay is mounted on the inner fender (doesn't say which side). The fuel pump inertia switch should be found under the dash to the right of the transmission hump and near the heater case. Depress the button on top of it to reset it. Hope this will help.

when the dash lights wont come on turn the headlights all the way on get out and go see if the parking lights are on , some vehicles its a failsafe to let u know parking lights are out , if so there is a fuse for it in the panel , if not the p l fuse , next i would check the dimmer switch for the panel lights E X ... remove switch place ohm meter across leads (with the plug undone) with the switch in one pos u will get a reading , now roll the switch and ur reading should change , if not , there lies the problem , get a new one

check the radiator cap it may be holding too much pressure