HAVEN'T OWNED THIS VERY LONG, & RUNNING REG. FUEL, ENGINE LIGHT WAS ON STILL RAN FINE! OTHER MORNING TOOK OFF WITHOUT WARMING UP, STARTED RUNNING ROUGH . HOOKED UP SCAN TOOL & WENT FROM P0308 TO
P0308
P0316
P2401
P0447
GUESS i'LL START WITH PLUGS , COIL PACK IF i CAN FIND ONE EASY ENOUGH, PUT SOME BERRYMAN FUEL SYSTEM CLEANER IN TANK , ANY HELP VERY MUCH APPRECIATED , THANKS KEITH B

 

V6 or V8? If the latter, try running premium, too.

 

4.4 V-8 , parts house has nothing I want, so.. Amazon it is
Any suggestions on SPARK PLUG CHOICE, last time I changed plugs on my Ford Truck BOSCH LET ME DOWN.
Leaning towards NKG

 

There are no coil packs on the 4.4 V8.

Always run premium.

 

OEM Spark Plugs: NGK IFR5N10 (LR005253)

 

I installed the new NGK 95839 {#FR5AHX} Ruthenium HX plugs. I am not a fan of BOSCH plugs either, in fact its amazing how many car forum users have issues with BOSCH plugs or O2 sensors.

 

Using Upper case letter is like shouting at people. I would go with the plugs (Autolite) from Ford as it is one of their engines

 

Senior member posted my engine didn't have coil on plugs!? Well seems so, I was pretty sure but being a newbie. After Xmas stuff decided to get under the hood! Plugs showed up 24th.. my Xmas!

 

Thats a COP (coil on plug), not a coil pack..... Like I said, these trucks dont have coil packs...

 

This all started one morning , cold start. lack of power, stumbling, engine performance light & various codes . After initial Plug Replacement, not much change. Removed & cleaned MAF & cleaned Throttle body , ran out good for a spell .. then back to rough running & if I peddle it up, diminished engine performance lights up. Think I'll replace MAF, Thoughts on MAP? Plugs looked as if they were ready for replacement (not as bad as I thought. R&R) . Reading about CMP possibly causing problems but don't feel like spending money throwing darts! Going to clean MAF again check codes & run it, while ordering/ shopping for one. Thoughts on aftermarket MAF?