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2000 Expedition 5.4 L runs like junk

20 messages,  Last post on Nov 22, 2009 at 6:34 PM

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#1 of 20 2000 Expedition 5.4l runs like junk by jrobitaille

Oct 21, 2008 (5:50 pm)

I have a 2000 Expedition that until Sunday ran reasonably well. Sunday i started it and it seemed to Idle a little rough, took it fo a drive and got about 3 miles and it started to bog and get very sluggish. Accelerating was very slow and coming to a stop caused the engine to come very close to stalling. Check engine light came on solid and then began to flash, eventually stopped flahing and stayed on solid. pulled codes from the engine and they indicated a misfire on #3,4,7,8 cylinders, as well as the freeze frame data wich didn't say much of anythign short of it was at 163F and at 2000 rpm.
Disconnected the battery and tested: #5,6,7 and#1 coils both primary and secondary side,also tested the same injectors and pulled plugs(the only ones that were easy to get at) Next I tested: maf sensor,camsensor,tps unit, egr and controller, intake air temp sensor, head temp sensor,crank sensor. All tests were done according to Haynes manual, reconnected the battery and tested all sensors listed for incoming PCM voltage with Key on. All tests came back OK according to Haynes.
Unfortunatly disconnecting the battery has erased the codes and I cannot/don't want to drive the truck to trip the DTC's again for fear of causing more damage. I have idled it and no lights come on, but the truck is running WAY rich, it burns your eyes from 10 feet away.
 I am wondering if the knock sensors could cause this problem? Any help???
Thanks

#2 of 20 Re: 2000 Expedition 5.4l runs like junk [jrobitaille] by jrobitaille

Oct 27, 2008 (5:44 pm)

Replying to: jrobitaille (Oct 21, 2008 5:50 pm)
Found it coil# 4 was shot and #7 fluctuated on the ohm meter when tested, swapped them out, put in new plugs and it runs like new.

#3 of 20 Re: 2000 Expedition 5.4l runs like junk [jrobitaille] by tidester

Oct 27, 2008 (9:55 pm)

Replying to: jrobitaille (Oct 27, 2008 5:44 pm)
Yay! I'm glad you got that worked out.
 
tidester, host
SUVs and Smart Shopper

#4 of 20 Haynes books? by fordexpo

Jan 24, 2009 (5:13 pm)

Haynes are a waste of paper, go on ebay and you can find a Ford DVD that is from the dealers for sale out the door cheap. it covers all Fords in the model years and has almost everything from body parts to the paint

#5 of 20 Re: Haynes books? [fordexpo] by tidester

Jan 24, 2009 (11:52 pm)

Replying to: fordexpo (Jan 24, 2009 5:13 pm)
Haynes are a waste of paper ...
 
Message #2 would seem to indicate that Haynes was spot on. But then Haynes vs. Ford DVD isn't really the issue here.
 
tidester, host
SUVs and Smart Shopper

#6 of 20 Re: Haynes books? [tidester] by fordexpo

Feb 15, 2009 (5:19 pm)

Replying to: tidester (Jan 24, 2009 11:52 pm)
I just thought that the DIY people would like to know that real good information is available to fix any Ford. Sorry to be off topic #2

#7 of 20 Re: Haynes books? [fordexpo] by jrobitaille

Feb 17, 2009 (5:24 pm)

Replying to: fordexpo (Feb 15, 2009 5:19 pm)
You are right Haynes is usually only good for the bare basics but the one thing it does most of the "pro" manuals don't do is show you easy ways to test things, usually with simple tools we all have. Unlike the Ford manuals that love to use the " Rotunda *****" whatever tester with adapter plug bla bla bla. But you are correct the are strictly laymen manuals and for more in depth things you definately need the real deal, I usually keep one of each on hand.
As for manuals another good source is alldatadiy.com for something like $20.00 you get a year long subscription to any vehicle you want, if you have hi-speed internet download the whole thing and you're done.

#8 of 20 Re: 2000 Expedition 5.4l runs like junk [jrobitaille] by fordtrucklover

Feb 21, 2009 (11:40 pm)

Replying to: jrobitaille (Oct 21, 2008 5:50 pm)
For anyone having problems with hesitation, or ruff idling with the 5.4, associated with a check engine light.
 
I have a fleet of 36 ford 250s with 5.4 engine years 2000 to 2008, and have experienced the same problems with hesitation, and wanting to die at stops, and always ends up being a bad coil. If you look in the owners manual, they actually recommend replacement of all coils, as a tune-up, at what I believe is 70,000 miles. I now am replacing coils as a tune-up measure with spark plugs, with the coils being around 45 dollars a piece can add up, but it is better than being stuck on the side of road, running on 6 or 7 cylinders. Have also had check engine lights for bad spark plug gaps, so be sure they are right, Good luck to everyone!

#9 of 20 by alwaysfords2

Feb 23, 2009 (6:25 am)

You can get aftermarket coil sets on ebay for $90 for a V8.

#10 of 20 by alwaysfords2

Feb 23, 2009 (6:26 am)

And wanting to die at stops without any other symptoms is probably the Idle Air Control Valve (IAC).

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