okay soo its not a f150 but its a 2006 econoline 250 with 5.4l. now its running like crap no codes been like this for 2 months... i unplug c.o.p. and nothing can find the skip... i swapped the control module out for the fuel pump, and the cpu in the engine bay and still nothing... i did notice theres gas in the oil... possible bad injector?? please any input would help!!!

 

bump

 

if its it has a really loud tick that get faster as the rpms go up them it could be an injector.

 

Smelling fuel in your oil could mean a couple of things. It could be either bad piston rings or bad valves. If you want to find out what one it could be, do a compression check. If you find a cylinder that has low compression, pour a teaspoon of transmission fluid into that cylinder, wait 2 or 3 minutes and test the compression again. If the compression rises then you have bad rings, if it doesn't then it could be a bad valve. Hope this helps!!

 

yeah tuesday awhen im at work im gunna do a little more work on it... but what puzzles me.. is when i unplug a c.o.p tthe truck runs fine then i plug it in.... then i unplug that same one and it runs like ****... its like it doesnt matter if i unplug a c.o.p.

 

When you say C.O.P. I'm assuming you mean Coil Over Plug correct? In that event, what coil/plug/cylinder is having trouble? One thing you can do in order to eliminate the COP from the list of faulty items is switch it with another one on the same bank/side as the one in question and begin your trouble shooting again. If the same cylinder acts up with a different COP, then you've ruled out the COP. But if the cylinder that you moved the COP in question to acts up, then you know the COP is bad. There are 2 other sensors that are coming in to play if we are on the same page about the COP. The Crank Position Sensor and the Cam Position Sensor. I'm not sure if Ford used both or one of the 2 in their ignition system, but if they only used one it would be the Crank Position Sensor. Look to that Crank Position Sensor as the culprit for your misfortune if the same cylinder is acting up even if you swapped the COP. Keep me informed as I hope I'm helping and not making you bark up the wrong tree!!

 

yeah well see i unplugged #4 and it didnt make a diffrence soo we had a new coil at the shop soo i tried it and it ran better sooo i unplugged other ones and it just seems like ever other cylinder wouldnt have a diffrence to it.. then if i can back to #4 and unplug it the motor wouldnt skip any worse... now the crankshaft sensor where is that located? im gunna be on the phone tues with a ford dealer seeing if they experienced any of this before...

 

The crankshaft sensor will be right next to or right behind the harmonic balancer (the main belt pulley). It has a magnetic pick up on it so there may be some shavings stuck to it. It's capabilites are based on resistance so it can be checked with an ohmeter, but you might have to ask Ford what it's allowable operating ratings are...or you could just buy a new one and give it a shot! Sounds like your culprit may be that COP though. When you unplug the others to see if it will make a difference the ECU (engine control unit) is going to try and compensate and advance the other COPs and fuel delivery via the Crankshaft Sensor and Camshaft Sensor (if so equiped) to cover the dropped cylinder, now if the COP that you unplugged and plugged back in is the faulty one then that could explain why it's hit and miss with the results. Check the electrical plug that connects to the COP, there could be a loose wire or connection. Sometimes the connections spread out and have intermittend connectivity which could also lead to a suspicious COP too!!

 

hmmm interesting illl look into it more tomorrow...