06F150fx4Flowmaster

Hey y'all I got a 06 F150 with a 5.4L and when I have my truck in park it idles rough, the seats vibrate. If I put it in drive it goes away. No check engine light, spark plugs and coils have been done less then 15,000 miles ago. Any ideas? It's very annoying. I know it's a common issue or a "ford thing."

techrep

iTrader: (1)

What brand parts were installed ?

06F150fx4Flowmaster

Motor craft always.

SCORGE

Thread refresh post..

SCORGE

Fuel filter been changed recently?
Throttle body clean?
MAF clean?
FPDM in good shape?

techrep

iTrader: (1)

double check the torque on your plugs.. did you replace the COP's with Motorcraft COP's @ $60 ea. ?

j_kied

I'm having the same issue. I have aftermarket coils though, will those cause a rough idle? Haven't checked the fpdm yet but everything else seems to be squared away

techrep

iTrader: (1)

What all did you replace ?

Raph

J Osthimer

Had p0345 and p0349. New pcv, vvt's, new phasers, new coils and plugs, new Cam position sensors, still getting p0345 and rough idle. I'm at a loss. I read about a relearning process but idk if it will help. Any help/ideas? Please and Ty