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bucking on decel

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Old Jul 10, 2013 | 10:29 PM
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Default bucking on decel

88 4.9l bucks on decel at any speed as long as its in gear. Also has a slight miss all the time. But gets worse under load
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Old Jul 11, 2013 | 09:21 PM
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Bump
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Old Jul 12, 2013 | 01:21 AM
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First thing I would look at is the IAC. It opens keep the throttle from closing too quickly on deceleration to reduce bucking. Also check your motor mounts and breaks for grabbing.
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Old Jul 12, 2013 | 07:39 AM
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Originally Posted by Warlockk
First thing I would look at is the IAC. It opens keep the throttle from closing too quickly on deceleration to reduce bucking. Also check your motor mounts and breaks for grabbing.
Have replaced am checked the iac previously. Checked out fine. Motor mounts are good. And brakes aren't grabbing
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Old Jul 12, 2013 | 10:48 PM
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Resolved the miss with motorcraft plug wires. Wires on there before weren't old, less than a year old. Had some sort of fluid on some of them though. Probably power steering fluid because a leak a while back
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Old Jul 13, 2013 | 01:22 AM
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Cool did that solve the decel issue too ?
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Old Jul 14, 2013 | 10:58 AM
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Nope still have the decel problem

Last edited by Crowder; Jul 14, 2013 at 11:07 AM.
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