plgalleg

Truck would misfire at around 45 mph, Stall when coming to stops after engine was warm, idle rough after engine was warm and sometimes shake real bad at idle. Ran diagnostics and only gave code p0022. During the past year the rough idle and the shake did occur several times but turning off the engine and turning it back on would clear the problem. But as time went on all those problems up above seem to get worst. First thing I did was replace the the vct solenoid on bank 2 since the code indicated it was on bank 2 and had an oil change done by Wal-Mart(mistake). Problems still present and appeared to even get worse. Replaced both cam shaft sensors and still no improvement. During 1 drive cycle did get a cylinder 8 misfire. So I replaced all spark plugs, boots and that coil on cylinder 8. This fixed the missing at 45 mph. Pulled throttle body off and cleaned it as well as the TPS and this fixed the stalling when coming to the stop. So I still have the p0022 code and rough idle. Doing some thinking and researching these blogs I came to the conclusion I have an oil pressure issue. Many people have gone to the dealers and they tell them the cam phasers are bad. I don’t think my cam phaser is bad but time will tell. I removed my vct solenoid and noticed some oil sludge built up in that vct body. I carefully cleaned it with some long q-tips and pored some seafoam in this area. Immediately changed the oil and oil filter with a motorcraft filter and oil. Started to notice an improvement on the rough idle and p0022 was cleared. The code and rough idle does come back but less frequently and seems to be improving the more I drive. I’ll keep you informed of the results. It’s sad that I can’t use an aftermarket oil filter and need to make sure my oil change is done at 3000 miles. I should have bought tundra. My Tacoma has 170,000 miles and I probably go about 7000 miles between oil changes and have had only the starter go out on this truck.

Turns.To.Rust

Ive got an 08 F-150 Fx4/ 5.4L, but its like you just told a story about MY truck haha. Didnt think a simple oil change could be screwed up, but Walmart proved me wrong I guess. I havent started to fix my truck yet (Im waiting to get into the shop) but if you could point me to where to start then I might be able to save myself some cash and you'd be my hero.

Did you ever find out what it was that was making your truck run funny?

Mines particularly bad when I go from reverse to forward, and "under 1000 rpm" is what my Edge Evolution chip said when it threw me a code.