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2004 f150 rough idle, won't start

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Old 04-29-2016, 09:14 PM
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The module will cause those symptoms of not starting or rough idle . But has nothing to do with the oil being way over full and smelling like gas. Oil should never smell like gas no matter how old . Old oil will smell burnt not like gas. I would change the module for sure plus if it does have stuck injector or injectors that will also ruin the plugs . Gas in the oil is very bad for the motor pretty much makes the oil useless . Good luck hopefully it's an easy fix .
Old 05-02-2016, 10:30 AM
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If its not the fuel module than I would initially say that it sounds like a bad coil. Its got the symptoms at least. My oil fill cap has that milky substance and it is condensation. I always think my oil smells like gas and have actually had 2 mechanics take the smell test but was told its all good. Is your truck throwing any codes? Take it somewhere for free if you are able and don't have a scanner. Start with the module and go from there. Also might want to check the torque on the spark plugs. Good luck
Old 05-02-2016, 09:12 PM
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Default 2004 f150 5.4

Okay, so for what I got done today before work. Got the fuel pump driver module put in ( it came with handy lil spacers) definitely hear the fuel pump coming on. Put new oil in (had dumped previous oil to check for coolant when finding gas). Tried to fire it up and it was Givin a great effort just wouldn't fire. Now, at the beginning of all this when I had bucking and a blinking check engine light, I ran codes. It gave me a bunch. I don't have them in front of me but believe it was a bunch of po'somethins and misfires and bank retards. I'm going to run codes again tomorrow since all plugs have been replaced and see what it gives me. To check fuel injectors, can I just pull the fuel rail up with injectors attached, turn the key but not start, and see which ones are leaking to find culprit? Or, does it get more in depth than that? Keeping fingers crossed for a few less codes this time around. This night shift cuts my car tinkering time down big time. Also, 130 bucks each for injectors seem steep? I'm gonna check rockauto in the morning but oreillys is sayin 130. Can u just clean injectors if they're bad or do they require replacement.
Everybody's advice and patience is very much appreciated! Thanks very much!
Old 05-03-2016, 09:57 AM
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Originally Posted by bigblaster
Okay, so for what I got done today before work. Got the fuel pump driver module put in ( it came with handy lil spacers) definitely hear the fuel pump coming on. Put new oil in (had dumped previous oil to check for coolant when finding gas). Tried to fire it up and it was Givin a great effort just wouldn't fire. Now, at the beginning of all this when I had bucking and a blinking check engine light, I ran codes. It gave me a bunch. I don't have them in front of me but believe it was a bunch of po'somethins and misfires and bank retards. I'm going to run codes again tomorrow since all plugs have been replaced and see what it gives me. To check fuel injectors, can I just pull the fuel rail up with injectors attached, turn the key but not start, and see which ones are leaking to find culprit? Or, does it get more in depth than that? Keeping fingers crossed for a few less codes this time around. This night shift cuts my car tinkering time down big time. Also, 130 bucks each for injectors seem steep? I'm gonna check rockauto in the morning but oreillys is sayin 130. Can u just clean injectors if they're bad or do they require replacement.
Everybody's advice and patience is very much appreciated! Thanks very much!
I've pulled my fuel rail to look at my injectors with mixed results because its hard to see the back ones especially the pass side but its worth a shot. Just remember to de pressurize them first and be careful not to loose any o rings. They tend to want to come half way out ( the bottom ones). I got refurbished injectors at Rock Auto for like $35 bucks or something. Don't try cleaning them. The pros do it way better with a guarantee. I would think even if you had a leaky injector that the truck would start at least in the morning. I have to re read your info but did you replace the fuel fiter? Maybe posting your codes at some point could help narrow it down
Old 05-03-2016, 10:12 AM
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Ok, so I see you didn't change the fuel filter or at least didn't mention it. How about the air filter or throttle body? How strong is your battery and how old? I personally regret dumping probably un needed parts into my truck so don't go crazy with part swapping. Whats the deal with your mechanic? Did'nt he run any other diagnostics other than an $850 plug job. It still might be a bad coil/coils but the truck should still start. Post the codes and go from there
Old 05-06-2016, 08:02 PM
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Default 2004 f150 5.4

So, I went a grabbed a code scanner today and could only get p1000 to come up. Still couldn't get it started. Just turning and turning. I did have the battery disconnected for awhile last week when I was screwing with the coils. I got the drivers side fuel rail pulled up and turned key. There was no leaking from injectors. The leaky spot I thought I had was just the O ring and came off in the fuel rail. Reset that and no leak. So the truck has a new fuel pump driver module and plugs at this point. The mechanic I originally had it at to get plugs out after breaking got it running after the plug change. After that he couldn't get it started again. He quoted me some big #'s to figure it out and I felt if we're just looking at trying dif parts and scratching our heads, I can do that in my drive. My next plan of action is..... new battery, fuel filter start checking coils and plugs. Can you use an ohm reader to see if coils are operating? I just wasn't sure how I figure out if one is bad or not. Doesn't help that can't get any codes right now besides the p1000
Thanks everybody for your continued input, it is very appreciated!
Old 05-07-2016, 01:50 AM
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Bigblaster,

A few articles here which you may be interested in or answer your questions (no start and coil info)....

http://troubleshootmyvehicle.com/for...-of-articles-3
Old 05-07-2016, 04:32 PM
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Did'nt feel like pulling the pass side fuel rail did ya? I don't blame you although its not too bad and you only have to move a few things. I'm not sure it would help you anyway. The no start is a bugger because at least if it started and idled rough you could unplug coils and injectors and that sort of thing to look for changes. did you change the fuel filter? Its cheap and not that bad of a job. Just have to have the fuel line disconnect tool
Old 05-12-2016, 08:54 PM
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[QUOTE=There is a milky color to the dipstick fluid like coolant got in.[/QUOTE]

I think you just answered your own question.
Old 05-21-2016, 12:42 AM
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Default 2004 F150 5.4 update

Ok, thought I'd update everyone who's been helping out with my fix. 1st off, sorry for the delay. Been real busy at work.
I received my 8 new coils and installed. Got the truck started finally. Had to push gas pedal while turning to get to fire. If I hold my foot on the pedal at least a little, it will remain running. Take my foot off and the thing dies out. When it is running there is no crazy banging and clanging or amything, just idling real rough. Also, it's blowing a good amount of white smoke from exhaust. Smells like burnt ***. Not sweet like coolant. Some drippage of what seems like water from exhaust pipe. I stuck my finger in it and it didn't really have a smell. Popped coolant cap while wife was holding the pedal and there was no gurgling or anything with coolant (I had heard, sometimes with a head gasket issue you will get pressure through the coolant reservoir). Anyway, any ideas? Gas prob? Compression? Thanks again for all the advice everybody! It is appreciated!


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