Misfire

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Dec 9, 2017 | 12:51 PM

Flyfisher98

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Misfire

Hey everyone, I’m new here but I felt like I need to share my problem in case someone has had a similar one. So I have a 2004 F150 5.4. And I have replaced several coil packs in its life, it is currently at 112,000. But a few weeks ago I threw a misfire code in cylinder 2, I changed the coil pack and plug with no change. So I moved on to change the injector and a few hundred dollars later I have yet to solve the problem. After changing the injector about 30 minutes ago I am throwing even more codes. Can anyone help me?

Dec 9, 2017 | 08:10 PM

pdqford

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Joined: Jan 2001

Posts: 3,740

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From: Central NYS

I’m sure the experts are gonna want to know the specific codes it is now throwing.

Dec 12, 2017 | 12:15 AM

Flyfisher98

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Joined: Dec 2017

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Codes

sorry I took so long to reply. 12 hour shifts are long and all I wanna do is sleep. So the codes are looking like I blew even more coil packs and idk how but here we go.

Cylinder 1 misfire
cylinder 2 misfire
bank 1 too lean
ignition coil a,b,c malfunction
misfire on startup and random misfire
this is all going on but the starting problem was with cylinder 2 which I changed COP and plug with no solution.

Dec 12, 2017 | 12:40 PM

pdqford

Logistics Pro

Joined: Jan 2001

Posts: 3,740

Likes: 37

From: Central NYS

I’d start by looking for a vacuum leak causing bank 1 to go lean and causing a misfire on 1 and 2. Is the injector o-ring installed correctly to prevent a vacuum leak on bank 1?