[ZTWsquared]

(07-06-2014, 07:27 AM)duckcanuck Wrote: I have an update about the problem I was having with my 2003 Zetec.

After reading the replies here on the forum, I chased all the wiring under the hood. Everything checked out OK, and as I removed and replaced each connector, I added some dielectric grease (so I could feel like I was accomplishing something!).

Anyway, the weird behaviour continued with intermittent misfires, speedo flicks, and no CELs.

Until last Wednesday night.... finally the misfire became permanent, and I got lights and codes. There were two codes: P0316 and P0304 (Misfire in first 1000 revolutions, and misfire on cylinder 4).

Today I dove under the hood, and chased the problem on cylinder 4. Eventually I came to the conclusion that the coil pack was not generating a spark on #4.

Luckily, my local U-Pull yard was still open, so I went and grabbed a coil pack (I didn't want to drop big bucks until I was sure of the cause).

Well, except for having a heck of a time getting the four stupid Torx screws out of every pack I found, the rest went well. The car is now running on all cylinders, and pulling strongly.

It is too soon to declare that the speedo symptom is also gone for good, but I am hopeful.

Thanks to everyone who commented.

All for now,

Bob the Duck Canuck

Thanks for the update and congrats on a good outcome - hopefully this thread helps someone out down the road.