91 150 jerking.
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From: Everett Washing
91 150 jerking.
Hey I have a 91 f150 that I just bought and have been working out the kinks, The original problem was alot of jerking under load especially hills, and at low rpms, So I decided to do a tune up i figured it was never done, Wow was I right , plug gap was 75!!! 6 wires broke off and were stuck to the plugs, so i did a full tune up . PCV valve, Air Filter, Plugs,( gapped them to proper specs, ) Wires, Cap, rotor, fuel filter..
Now the truck only jerks when holding a constant speed?? when I accel it goes away no problems, and decell, same thing no jerking, Just when im trying to hold a constant speed. Any Ideas?? I cant think of anything besides bad injectors or clogged any tips appreciated.
91 f-150 2wd 302efi
Now the truck only jerks when holding a constant speed?? when I accel it goes away no problems, and decell, same thing no jerking, Just when im trying to hold a constant speed. Any Ideas?? I cant think of anything besides bad injectors or clogged any tips appreciated.
91 f-150 2wd 302efi
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Joined: Oct 2010
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From: Corpus Christi, Texas
Definitely your TPS. I have the same problem on my truck. Rock solid answer though.
Here's a link to my thread explaining my symptoms, which are identical to yours.
https://www.ford-trucks.com/forums/1...help-asap.html
Here's a link to my thread explaining my symptoms, which are identical to yours.
https://www.ford-trucks.com/forums/1...help-asap.html
Senior User
Joined: Oct 2010
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From: Corpus Christi, Texas
Haven't gotten around to fixing it, but will soon. I'll update when I do, or if you end up doing it first, then let me know if this solved your problem.
Hope that linked helped. Good Luck!
Hope that linked helped. Good Luck!
Postmaster
Joined: Aug 2005
Posts: 4,728
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From: Cleveland, TN
Have you pulled trouble codes yet? You can throw parts at until you accidentally hit the right thing, or run DTC codes and let the truck tell you what it needs..
BTW..... TPS is throttle position sensor
BTW..... TPS is throttle position sensor
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Joined: Aug 2005
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From: Cleveland, TN
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From: Everett Washing
I think dude was right. In the book it says bad tps will cause surging and jerking, hesitation on accel, sudden dieing of the engine, and unsteady idle, That just explained everything that happened. Thanks for that link to self Diog that will come in handy! Appreciate it fellas
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From: Corpus Christi, Texas
Sorry.
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From: Everett Washing
I went and looked at it the other day, and then I looked at the sun, Then I looked back at the truck, Then I looked up at the sun, Then I looked at My cold beer. And Said Not NOW.. Is she running better though, Did you notice any difference in the down shift at all?