skipping while accelerating
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New User
Joined: Jun 2011
Posts: 5
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From: South Carolina
skipping while accelerating
I have a 99 f150 that skips bad on acceleration. I've replaced the plugs, wires and coils, I have also done a throttle body cleaning. My wife has a 2003 f150 and hers did the same thing and when we changed the fuel pump it cleared up. Am i rite in replaceing the pump in mine or is there some place elce I should be looking. Please help it's starting to get expensive.
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
Well you really should find the cause instead of just guessing.
Guessing cost extra money and time before you might get lucky.
Since you have already eliminated the ignition parts with no change; I would be looking at the crank sensor plug seating, the cam position plug seating, relay seating in the fuse panels involving the PCM, harness issues etc.
Seems the issue may be vibration or engine movement sensitive.
The throttle body would not act like this. Good to clean it but not for your issue.
Are there any other noticeable driveability issues such as transmission shifting etc that might be caused by the TPS.
You can get a good idea of the fuel system by testing rail pressure before deciding on dropping the tank for a pump change.
Good luck.
Guessing cost extra money and time before you might get lucky.
Since you have already eliminated the ignition parts with no change; I would be looking at the crank sensor plug seating, the cam position plug seating, relay seating in the fuse panels involving the PCM, harness issues etc.
Seems the issue may be vibration or engine movement sensitive.
The throttle body would not act like this. Good to clean it but not for your issue.
Are there any other noticeable driveability issues such as transmission shifting etc that might be caused by the TPS.
You can get a good idea of the fuel system by testing rail pressure before deciding on dropping the tank for a pump change.
Good luck.
Thread Starter
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New User
Joined: Jun 2011
Posts: 5
Likes: 0
From: South Carolina
I thank everyone that has helped me figure out this problem. It is fixed but the problem is I don't know what I did to fix it. I had an old throttle body on the shelf and i replaced mine with it along with another set of new plugs and a new coil pack and whatever it was it seems to have fixed it. Thanks again.
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