Truck slowed down the died going down the road

Asked by May 13, 2017 at 05:51 AM about the 1988 Ford F-150 XLT Standard Cab LB

Question type: Maintenance & Repair

OK I was driving down the hwy and had my cruise
control on like I do every day and ive been hearing
a small huming noise lately not loud but real soft I
was thinking it might have been the radio but I
know this wasn't what caused my problem. I was
going down the hwy doing about 65 mph when I
felt my truck bump like someone taped the brake
real fast and let off my truck started to gradually
slow down even if I was pushing on the gas it
didn't go any faster it finally came to a stop my
lights dimmed then the truck died. I sat puzzled
thinking it might be the altenator but I started it
with the key gave it a little gas and it started back
up. It was changing gears while going down the
road so I don't think it's my transmission  and I
don't think that would cause a truck to die
completely. But I anyways I drove a few more
miles and it did the same thing again. I made it
home checked the engine nothing smoking or
burning. And checked underneath the truck
nothing leaking. I even hooked up my obd1 and it
gave me the code 11 everything's ok. So Im not
sure what it is could an alternator do this or a
starter?? Any help would be greatly appreciated.

4 Answers

102,415

Replace the ignition module and distributor pickup coil, both of those are know problems, when they get hot the internal circuitry goes open and the rig dies, once they cool enough it will fire back up and run until they get hot again and it will guit running, over and over. HTH

20,510

In the no start condition, you can check if there is a no spark condition at the coil with a multi-meter while the engine cranks. No spark = problems with the module or other components. There are probably a lot of videos on how to check these related components. Replacement modules are usually tested/built to several hundred duty cycles between minus double digit temps to over a 100 degrees Celsius. As "Tennis" indicated, they are prone to head related failure.

Everything their checked out fine also I had the battery and altinator tested just in case and they were OK. It all started when I switched to my rear gas tank the tank is brand new and none of the Lines are kinked however I did notice a canister leading to the fuel filter the fuel filter is brand new but the canister is where the humming noise is coming from I switch to the front tank and haven't had any problems and the humming noise goes away until I switch back to the rear tank then it does the same thing as from my previous post. I'm thinking it has something to do with that canister.

102,415

Ok, now I understand, that canister is the fuel tank switching valve, it uses the pressure from the in tank pumps to switch itself from tank to tank, so double check the fuel tank lines make sure they are not reversed and the pressures are not too high from the rear tank.

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