jolt when accelerating

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Dec 19, 2001 | 10:47 PM

dbarracuda

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Joined: Sep 2001

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jolt when accelerating

hey guys
I have this problem in my 77 F-150 400m. At least i think it is a problem. My gas pedal has a sticky spot in it and somtimes when i acceletate the pedal sticks. At that moment i feel a jolt as if some thing in the drive train is loose and is just now turning and coming into contact. When this happens i feel the gas pedal sink down a little. Any ideas of what this could be and is it serious.
thanks
David

Dec 19, 2001 | 10:52 PM

Mil1ion

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jolt when accelerating

Let's hope you still have TWO throttle return springs for one thing.
If one is missing or broken,that could cause an EASY pedal.

Does it do this in both 1st or 2nd gear from a full stop?
Sounds like a Transmission modulator to me,but I could be wrong.

Dennis:-X12

It's Almost Time Everyone.
https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=314&.jpg

78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles :-X12

Dec 20, 2001 | 08:02 AM

William

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Joined: Feb 2000

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From: Sun River St. George

jolt when accelerating

Check your motor and transmission mounts.
William in Atlanta

Dec 20, 2001 | 08:28 AM

dbarracuda

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jolt when accelerating

Dennis
I believe that it only does this in first gear excep for the sticking. It will stick throughout all the gears. How do i tell if it is missing a spring?
Thanks
David

Dec 20, 2001 | 11:14 AM

beartracks

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Joined: Nov 2000

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From: Albuquerque

jolt when accelerating

Follow Williams's advise. Have someone rev the motor in gear while you watch it to see if it rears up.

Bear

Dec 20, 2001 | 11:49 AM

73Custom

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Joined: Apr 2000

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From: SD

jolt when accelerating

[font color=red size=2]A friend had a '78 that was sticking like that, we just sprayed the joints of the throttle linkage with lube and it stopped. When it was sticky, it would clunk too. Ended up it was just the jarring of the sudden acceleration and a little slack in the driveline. Check the driveline over for looseness or slack. I bet once you fix the sticky throttle, you won't notice a clunk anymore - try it out.