Hey, still chasing my tail on this truck. Again, it is a 98 F150 4.6 with 201,000 miles. I cleaned the throttle body @ 190,000, replaced DPFE sensor, plugs, and wires. Recently, it started running VERY ROUGH so I replaced spark plugs with Motorcraft, sprayed spark plug wires with water to see any arcing (looked fine to me). No check engine light or code. I have inspected to the best of my ability, vaccum hoses, loose wores or anything that would cause the truck to run rough at idle or especialy under load while driving. Truck is shuddering really bad and has no power. I am considering throwing more money at it. I see on the coil pack (not COP's) there is a number that reads F5LU-12029-AA, below it reads 12V. 7241C1. Also, on the fuel injector, it reads 280150943. When I punch these numbers into fordparts.com or rockauto.com, I get "no matches found" Can someone help me out. I am taking the numbers directly off the part on my truck, why are they not good numbers? Sorry for the long statement, just wanted to be through. Thanks

 

This is what I come up with on rock-auto.
Coil. - MOTORCRAFT Part # DG530 , or MOTORCRAFT Part # DG523
Plug. _ MOTORCRAFT Part # SP413 Nickel
or -MOTORCRAFT Part # AGSF32FMF6 Platinum

 

Fuel injector part # for 1998 4.6 PN-96 (truck) is, FOTE-9F593-D5A Black/Yellow. Just go to back to the Rock Auto site and order the coil pack for a 1998 4.6. Basicly can do the same for the injectors. Check the fuel pressure at the rail. I would start with basics and perform a compression and leakdown test as well. Also try cleaning the MAF.

 

Yeah, I also, cleaned the MAF as well. Thanks for the part #'s