Rough Idle at start up.
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New User
Joined: Aug 2015
Posts: 20
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From: Central Texas
Rough Idle at start up.
I just acquired a 2003 with 5.4 L. Did all new plugs and coils, cleaned MAF sensor, changed air filter, oil, transfluid and filter (obviously not related).
Upon start up and idle the truck has is rough, enough that it will vibrate the whole truck SLIGHTLY. Once in gear and warm, it smooths out and is fine. Unit the next stop and start.
Any help figuring this out would be appreciated.
Upon start up and idle the truck has is rough, enough that it will vibrate the whole truck SLIGHTLY. Once in gear and warm, it smooths out and is fine. Unit the next stop and start.
Any help figuring this out would be appreciated.
Hotshot
Joined: Jul 2005
Posts: 11,931
Likes: 180
was it doing that prior to the plug and coil change ? Vibration can be due to a bad COP and things cleanup when it heats up.... I know they are new, but sht happens....... Your not using any antifreeze ? Level is constant ?
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New User
Joined: Aug 2015
Posts: 20
Likes: 0
From: Central Texas
Yes, it was doing it before the plug and coil change, but when it happened before, there was a Service Engine light come on with a misfire on #1 code. Now, there is no light on, but seems to be same symptom without causing the misfire, or misfire ??bad enough?? to trigger light? I don't know.
On the antifreeze. 50/50 and level is good.
What are some signs the intake gasket is bad other than the stutter?
On the antifreeze. 50/50 and level is good.
What are some signs the intake gasket is bad other than the stutter?
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