5.4 2v Coil Pack
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
With that many miles I would change them all.. The coils. The connectors in the coils get corroded. The bolt area cracks etc. Just did mine. like $220 from amazon only use motorcraft coils imo.
DG508
DG508
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
Correct plugs are good for 100k I would do 80k. get some new cops and leave the plugs for a while.
Fleet Mechanic
Joined: Feb 2011
Posts: 1,812
Likes: 88
From: Thousand Oaks, CA
I have read several people saying that Denso was the supplier for the OEM COPs.
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Fleet Mechanic
Joined: Jul 2002
Posts: 1,297
Likes: 34
From: S/W Virginia
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
You will need to look at PENDING CODES to see the misfire. You practically have to have a dead cylinder before an error code is set, so pending codes are your best friend.
Posting Guru
Joined: Jun 2009
Posts: 1,908
Likes: 20
From: Fort Smith, Arkansas
misfire counts in Torque app on "test results", the last digit is the cylinder #
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
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Tuned
Joined: Jun 2015
Posts: 344
Likes: 7
I'm having the same issue with my '99 5.4 2v with 65k on it. Pulling a 10k 5th wheel, it definitely gets annoying. I don't daily drive mine, but I'll try to remember to hook up my Blue Driver OBD II scanner to see what it says next time I drive it. It has mode 6 data, can scan all the systems (not just the CEL codes), and it a pretty good deal for $100, IMO.
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Fleet Mechanic
Joined: Jul 2002
Posts: 1,297
Likes: 34
From: S/W Virginia
I went out at lunch and tried an app on my laptop that pulled $53 codes, but the CID listed with them weren't cylinder numbers. I'm assuming I should see 1-A or 0-9.
I couldn't try the torque app on my phone since bluetooth isn't working, so I'll get a tablet when i get home and give the Torque app a try.
I couldn't try the torque app on my phone since bluetooth isn't working, so I'll get a tablet when i get home and give the Torque app a try.
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Fleet Mechanic
Joined: Jul 2002
Posts: 1,297
Likes: 34
From: S/W Virginia
I downloaded the Forscan app for my computer, and it's showing misfire for cylinder 8. So I'll do some troubleshooting with coil/boot on that cylinder this weekend.
When I opened up the forscan app, I did have 3 trouble codes showing, but the check engine light is not on. P1000, P0316, and P0325. Should I be concerned about eh P0325 code or is also related to the misfire issue? Why would it show on this app, but not have a check engine light ? It also didn't show on the torque app (lite).
When I opened up the forscan app, I did have 3 trouble codes showing, but the check engine light is not on. P1000, P0316, and P0325. Should I be concerned about eh P0325 code or is also related to the misfire issue? Why would it show on this app, but not have a check engine light ? It also didn't show on the torque app (lite).
Posting Guru
Joined: Jun 2009
Posts: 1,908
Likes: 20
From: Fort Smith, Arkansas
