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Need major help. 4.2 98 auto f 150

 
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Old 07-30-2015, 08:56 PM
Phillupj23
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Need major help. 4.2 98 auto f 150

Having a problem that i can't solve. At beginning my truck used to shake only in park. Then slowly started shaking in drive only in lower rpms. Now seems like it shake all the time in drive. Less when just at a light but more in lower rpms. Have replaced plugs, wires, coils, and engine mounts. Cleaned iacv and maf. Took it to a mechanic he couldn't figure it out also. He said there was no misfires while accelerating but was misfires when decelerating. No check engine light. Another thing. When accelerating I can hear like a little jingle noise and when I put my foot down at higher rpms it sounds like bbs in a tin can. Thanks. Any help would be great.
 
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Old 08-04-2015, 06:32 PM
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'when I put my foot down at higher rpms it sounds like bbs in a tin can'


It's pinging - there is a problem causing the spark to be over-advanced. That may be associated with your other problem. Pinging is destructive. You may be able to quiet it by using premium fuel until you can fix the problem.
 
 
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