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Started By
Message
Truck idles rough, need a Ford guy
Posted on 8/3/16 at 12:18 pm
Posted on 8/3/16 at 12:18 pm
So I've got this 2006 f150 with the 4.6L V8. Started idling rough and sputtering a little. Check engine light came on. Code reader says IAC (idle air control) is out. Too bad this truck has an electronic throttle body. Replaced that, problem persists. New code is cylinder 5 misfire. Going to change the plug and coil. My question is, is this something anybody has gone through? Is there something else I should be looking for?
11
Posted on 8/3/16 at 12:20 pm to 4X4DEMON
i had a cyl. 5 misfire in my 05 5.4. took it in and had the plugs changed. it has the shitty 3 piece plugs that are known for breaking. its running great now.
Posted on 8/3/16 at 12:34 pm to onelochevy
How much does that run to fix it? Im having the same problem in my older F150.
Posted on 8/3/16 at 12:43 pm to 4X4DEMON
quote:
Too bad this truck has an electronic throttle body. Replaced that, problem persists.
You saying you have a new throttle body on there now? Don't buy the cheap Chinese coil packs. Amazon usually has the best price on Motorcraft coil packs.
The fuel pump driver module is also prone to fail. It's mounted above the spare tire. The module corrodes allowing moisture to get in causing problems.
Posted on 8/3/16 at 12:43 pm to 4X4DEMON
I've had 3 COPs go bad in my 2000 F150 5.4L. All 3 times she went into Limp Home mode. Never had the IAC code pop.
Truck's been parked for a long time now..trying to get the time to get it all fixed on her. Probably the last gas burner I own.
Truck's been parked for a long time now..trying to get the time to get it all fixed on her. Probably the last gas burner I own.
Posted on 8/3/16 at 1:00 pm to 4X4DEMON
Buy motorcraft plugs and packs and change them all. Bite the bullet now so it won't bite you later.
This post was edited on 8/3/16 at 1:01 pm
Posted on 8/3/16 at 1:13 pm to 4X4DEMON
Had this on an 01 F150. Pulled the coil and boot, made sure everything was dry, added dielectric grease before reinstall, cleared everything up.
Changing the plug and coil should work but you may try just the clean and lube. Those coils are not cheap.
Changing the plug and coil should work but you may try just the clean and lube. Those coils are not cheap.
Posted on 8/3/16 at 1:15 pm to onelochevy
quote:4.6 has one piece plugs.
i had a cyl. 5 misfire in my 05 5.4. took it in and had the plugs changed. it has the shitty 3 piece plugs that are known for breaking. its running great now.
9/10 when one of these motors starts acting like this it's usually the PCV hose elbow leaking at the back of the manifold. They get a hole in them and create a bad vacuum leak.
This post was edited on 8/3/16 at 1:16 pm
Posted on 8/3/16 at 1:21 pm to 4X4DEMON
The plugs and the coils can both cause the problems you are describing. Had a coil pack go out on my 04 5.4 that made it idle rough and run poorly. On my 09 5.4 the plugs wore out and caused the same problem.
Posted on 8/3/16 at 1:48 pm to 4X4DEMON
My neighbor has a ford truck like yours. Every warning light in the dash is on. It's a real pile of shite. Good luck.
Posted on 8/3/16 at 2:27 pm to Bossier2323
04-06 Ford F150 Service Manual 4.2 4.6 & 5.4 in the link. Should also be good for 07-08 since not much changed in those years. It's a big file.
F150 Service Manual
F150 Service Manual
Posted on 8/3/16 at 3:04 pm to 4X4DEMON
Seafoam.
Posted on 8/3/16 at 3:06 pm to tigah headache
My 02 Expedition had plug and coil issues that resulted in specific cylinder codes. They would go out one at a time about 2-6 months apart. After the third time, I had the mechanic change the rest. Cheaper to do it all at once because it may keep happening and $ labor > $ parts.
This post was edited on 8/3/16 at 3:11 pm
Posted on 8/3/16 at 3:29 pm to 4X4DEMON
Had a similar problem on my 07 F-150 with the 5.4. Changed out the plugs, which is a pain in the arse (took about 10 hours), but that didn't help. Ended up being the catalytic converters. The only code it threw while troubleshooting was a cylinder 1 misfire, also.
Posted on 8/3/16 at 4:15 pm to 4X4DEMON
Had a 06 mustang with the 4.6l.
Stupid arse plugs.
They make a tool to fish them out when they break. Might as well rent that or see if someone has one you can borrow.
Mine was at the body shop and wouldn't start even though I drove there to drop off. Was like $300+ because like 2 plugs broke.
Stupid arse plugs.
They make a tool to fish them out when they break. Might as well rent that or see if someone has one you can borrow.
Mine was at the body shop and wouldn't start even though I drove there to drop off. Was like $300+ because like 2 plugs broke.
Posted on 8/3/16 at 6:04 pm to 4X4DEMON
Had an '05 5.4L. Biggest piece of shite ever. Turned me off from ford
Posted on 8/3/16 at 6:20 pm to TrebleHook
Hey brah. Been on any charters lately?
Posted on 8/3/16 at 6:27 pm to Motorboat
Posted on 8/3/16 at 7:20 pm to Motorboat
Old charter 
This post was edited on 8/3/16 at 7:21 pm
Posted on 8/3/16 at 9:42 pm to weadjust
Thanks for all the ideas . Yea ive got a brand new throttle body on there. I'm going to get a new plug and coil for it tomorrow. Hopefully it fixes it.
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