86 f-150 problem
Have a 1986 f-150 4x4 5.0 302 automatic....power cuts out but engine still running but will not idle up s hift to neutral then back to drive starts to accelerate but starts cutting out continuously shift back to neutral turn engine off recrank everything is fine until it starts again might be a couple minutes sometimes might go a hour before it happens again any ideas or help
|
What kind of maintenance has been done to the vehicle , say last 6 months?
Believe this vehicle is not fuel injected or is it? How many miles on the clock? What have you tried so far? |
Hanky
Yes it is fuel injected and 249000 and change all regular maintenance is done to the truck plugs, wires, oil and filters other things new fuel relay, water pump, timing chain and gear, master cylinder, brake booster, thermostat, calipers and pads and rebuilt front end hub to hub and the center chunk even though some of that isn't engine related also daily driver so I don't abuse the truck like four wheeling im thinking couple more sensors throttle sensor or cam position sensor maybe even the voltage regulator
|
I don't want to give you a list of possibles and then have you go replacing good parts.
My thoughts so far cover the following; which should be checked and confirmed before replacing. Ign switch Coil Fuel pump connections Fuel pump if it has never been replaced What about the fuel filter ? You must be doing something right to get that many miles . Does this truck have 2 fuel tanks? |
Coil, ICM (Ignition Control Module), TFI (Thick Film Ignition) module are a few other possibilities. Make sure you have good clean grounds mainly on the ICM. The coil could be tired and starting to break down when getting hot. TFI's were more of an issue in the early 1990's while they were used due to their location.
|
Hanky
Originally Posted by hanky
(Post 97820)
I don't want to give you a list of possibles and then have you go replacing good parts.
My thoughts so far cover the following; which should be checked and confirmed before replacing. Ign switch Coil Fuel pump connections Fuel pump if it has never been replaced What about the fuel filter ? You must be doing something right to get that many miles . Does this truck have 2 fuel tanks? |
Originally Posted by Use Common Sense
(Post 97821)
Coil, ICM (Ignition Control Module), TFI (Thick Film Ignition) module are a few other possibilities. Make sure you have good clean grounds mainly on the ICM. The coil could be tired and starting to break down when getting hot. TFI's were more of an issue in the early 1990's while they were used due to their location.
|
I think now I can follow why you suspect the voltage regulator. If charging output is low or insufficient everything suffers until you rev up the engine and that is why you should check all the grounds as Use Common Sense suggested. Power loss can be caused by poor ign syst output or not enough fuel to meet demand. The fact that the problem comes and goes is what is going to take some time to chase it down.
|
Originally Posted by Shay_Fox
(Post 97824)
Great post common.
|
Originally Posted by hanky
(Post 97825)
I think now I can follow why you suspect the voltage regulator. If charging output is low or insufficient everything suffers until you rev up the engine and that is why you should check all the grounds as Use Common Sense suggested. Power loss can be caused by poor ign syst output or not enough fuel to meet demand. The fact that the problem comes and goes is what is going to take some time to chase it down.
|
All times are GMT -5. The time now is 04:07 PM. |
© 2024 MH Sub I, LLC dba Internet Brands