hey guys, maybe someone can give me a hand here...
'01 gt, 111000 miles..
ok, i am having problems w 4 cylinders not firing. cops and plugs are working fine. i ran all the checks i could to this part, and so far all this is working fine. im not getting enough voltage/amperage to #1,2,3, and 7 cyl causing them not to fire. ran continuance check on the wires and seems to be fine. now im on that part where the wiring goes from the firewall to the computer. i dont think its gonna be that section of the wiring (hopefully) giving me trouble since its inside the car (dash area, no exposure to elements), so i narrowed it down to the computer.... any suggestions will be well appreciated and taken into consideration. thanks!
Are you throwing codes for those cylinders? If so, I would move one or two of the COPs to other cylinders that aren't showing issues to see if the problem moves.
I have heard of the 4.6L and 5.4L having several COPs fail at one time, especially on trucks. I don't know if it is an end of life failure, power surge or coincidence.
If you have tried all those checks and want the pin outs, pm me your email address and I will send what I can find on the ECU wiring and connector pin outs on my Ford Service DVD (2000-2004 Ford)
__________________
"Ignore that whistle, it's just a vacuum leak."
2000 Mustang GT:
Saleen Series IV Twin Screw, Chicane I/C, AFCO Extreme H/E, 2.8" pulley, FMS 42# injectors, Dual Catted 2 1/2" UPR X Pipe, UPR LCAs/UCAs, 2 1/2" Flowmaster American Thunder kit, 90mm LMAF, 112" Goodyear Gatorback, Kenne Bell BAP, Mosaleen idler, T-56, Detroit TrueTrac w/ 373s, Demolet 100mm CAI, SCT XCal2 with JDM Engineering 93 Octane "Race" tune.
In the engine there is a connector with a screw on top to the passenger side close to the wind shield. make sure that is all the way in. if u done any recent work go back and recheck if any pins are bent or other. check all your computer connections and look for any visible damage. Do this with your battery unplug so it can reset. Good luck
yeah it was giving me codes for coil plugs/secondary for 1,2,3, and 7 cyl. i tried moving the cops around and they are all workin. thats how i discarded the cop failure option.... i tried everything already.... my mail is usiskin99@yahoo.com i really appreciate your help!!!!
In the engine there is a connector with a screw on top to the passenger side close to the wind shield. make sure that is all the way in. if u done any recent work go back and recheck if any pins are bent or other. check all your computer connections and look for any visible damage. Do this with your battery unplug so it can reset. Good luck
yeah i did that already.... i double checked everything on that plug and all is fine... i had never touched that plug till this happened... getting very frustrated..
Emails sent, I sent you some bonus stuff with DTC codes and a few cross reference tables for DTC / COP / Cylinder reference. Some of the ECU diagrams may come in handy later.
__________________
"Ignore that whistle, it's just a vacuum leak."
2000 Mustang GT:
Saleen Series IV Twin Screw, Chicane I/C, AFCO Extreme H/E, 2.8" pulley, FMS 42# injectors, Dual Catted 2 1/2" UPR X Pipe, UPR LCAs/UCAs, 2 1/2" Flowmaster American Thunder kit, 90mm LMAF, 112" Goodyear Gatorback, Kenne Bell BAP, Mosaleen idler, T-56, Detroit TrueTrac w/ 373s, Demolet 100mm CAI, SCT XCal2 with JDM Engineering 93 Octane "Race" tune.
Engine electrical problem!!! plz help! 
