2006 F-150 5.4 Rough Idle and Skip
#1
2006 F-150 5.4 Rough Idle and Skip
Please help. I have been chasing an issue with my F-150. It has 136,000 miles. It seems to run decent when it is first started. As the truck warms up, it develops rough idle and a skip. As you rev the motor, it smoothes out a bit. Gas mileage has decreased. So far, I have replaced cam sensors, #5 coil, fuel pump driver module. It also seems when it begins to skip, it sounds like there is an exhause leak. It all started a couple weeks back it was running fine, parked the truck, when i started it again, it ran horrible. Now the issue is sporatic. Im not sure where to go next. Im thinking injector issue but it seems it idles better then misses as it is revved. Im at a loss and really would love to get it going again. Thanks in advance for any help.
Last edited by upstatef150; 11-14-2015 at 09:07 PM.
#5
Senior Member
#6
Ok thanks. I'll try plugs. You think that may contribute to the very rough idle when warmed up? I'm not thinking cam phasers as I don't hear the clatter like everyone says. I recently had it oil under coated too.
#7
Senior Member
Yes vey well could be, have they been changed before? If not please read up on them and get the right tools
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#8
#9
Senior Member
Do the proper soaking as well, and get anti sieze/dielectric grease
Your coil on plug packs have a boot and a spring on them it's always good to replace them as well
#10
Please help. I have been chasing an issue with my F-150. It has 136,000 miles. It seems to run decent when it is first started. As the truck warms up, it develops rough idle and a skip. As you rev the motor, it smoothes out a bit. Gas mileage has decreased. So far, I have replaced cam sensors, #5 coil, fuel pump driver module. It also seems when it begins to skip, it sounds like there is an exhause leak. It all started a couple weeks back it was running fine, parked the truck, when i started it again, it ran horrible. Now the issue is sporatic. Im not sure where to go next. Im thinking injector issue but it seems it idles better then misses as it is revved. Im at a loss and really would love to get it going again. Thanks in advance for any help.