I have an 06 F150 FX4 5.4L automatic. It is running terribly. Let me startwith what happened. I went to the Shell station near my house. I put in $25worth of regular from a pump that is shared with a diesel outlet. I drove forabout 10 km with no problems. I pulled out to go around a tractor floored itand it immediately started shaking the engine light started flashing. When Istopped it was blowing a bluish white smoke and it smelled exactly like adiesel truck. It was still running but very badly. I thought maybe I screwed upand put diesel in. Went back to the station and check and I did not put dieselin and the attendant said they have had no other complaints. Went back todayand still no other complaints. I decided maybe it was a little of bad gas so Ifilled the tank with good fuel with no improvement. When the truck is runningit shakes when driving it still seems to have a good amount of power however ittakes a while to get going. When you turn on the key the fuel pump is very loudnow and it is very difficult to start. The fuel mileage is horrible. Half atank for 125 kms. There is so much raw fuel coming out of the exhaust it willburn your eyes. It is also throwing the following code:

P0173 - system to rich bank 1

P0300 - random/multiple cylinder misfire

P0301 - cylinder 1 misfire

P0303 - cylinder 3 misfire

P0304 - cylinder 4 misfire

P2196 - 02 sensor signal biased/stuck rich bank 1 sensor 1

Anyone have an idea of what could be going on?

 

A friend of mine had a similar problem couple months back on his 06, turned out 4 of his injectors went bad and 3 COP's. i have an 05 with 112k on it just bought it last year, was noticing after it would sit for a few hours it would take 2-3 time to start, did the baiscs first cleaned the MAF sensor and throttle body helped the idle a bit but once i changed out all 8 injectors rough idle and starting problem was gone.

 

After doing some research I am starting to think I have one or more bad injectors. I will check tonight.

 

Get it fixed IMMEDIATELY before you hydrolock the engine and/or cook the cats. Looks to me like you have 3 injectors stuck open.

 

I used a stethoscope and listened to all the injectors but they all sounded like they were pulsating. I thought that if the injector was stuck open that it would not pulse. Am I correct in thinking this?

 

The description of your problem screams out "injectors" -- I'm surprised you haven't hydro-locked your engine already! Stop driving that thing and get it into a shop!

 

Pulled both fuel rails off with the injectors still in them yesterday, turned the key on and the injector for cylinder 5 was spraying. I will replace that one today and change the plug on that cylinder. Hopefully all will be well after.

 

Just thought I should let everyone know, that I replaced the injector and spark plug on cylinder 5. I also changed the fuel filter and the engine oil. The truck is running top notch again. thanks to everyone for the info.

 

That is bizarre that the cylinder with the stuck injector was NOT showing a misfire - and ALL your codes were on the other bank.

Have you cleared the codes?

 

Cleared all the codes before I started the truck after changing the injector and no new codes have registered. Drove the truck around for a bit and rechecked and no codes. It also stopped smoking and is running good now.