Ford F150 Forum - Community of Ford Truck Fans - 06 f150 5.4 rough misfires and sucking noise

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Dustdark1

08-15-2018 01:18 PM

06 f150 5.4 rough misfires and sucking noise

My 5.4 runs fine when first started, after giving it gas it runs rough. I have a running lean code on bank 2 also it want do it all the time. Also when it is running good at idol it starts to jump and buck at around 50-60 mph....I NEED HELP ON FINDING THE PROBLEM

djfllmn

08-15-2018 01:20 PM

lean code coupled with a sucking noise= massive vacuum leak

Dustdark1

08-15-2018 01:42 PM

All hoses looked good maybe a gasket gone

djfllmn

08-15-2018 01:45 PM

check the little gasket around the air filter tray

Dustdark1

08-16-2018 02:17 PM

Ok I checked all hoses once again all looked good, checked the gasket around air filter tray also good. The sucking noise I hear sounds like it’s around the throttle body the best I can tell. Also the truck only has 90,000 miles and there’s not enough room to type out all the problems I had have with this truck.

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