Misfire Under Load

[Spyglass]

Guys, thanks for all of the replies and suggestions.

Unfortunately I had a busy weekend so not much time dedicated to the Cobra. The replacement fuel pump gasket and oil filter seal appears to have cured the oil leak. I removed the PCV valve, cleaned with WD40, manually manipulated it and reinstalled. Removed the plugs and they looked OK, but difficult to really judge as I'd run the engine to move the car around the garage earlier in the week.

I went for a quick drive on Sunday evening (it's currently too hot here to drive it during the day!) and whilst traffic prevented a full test, the misfire appears to have gone. I won't declare this resolved yet, but it certainly seems to running better. Does it make sense that the PCV valve could have cause this?

Stay tuned and thanks for the contributions.

Kevin

[patrickt]

Originally Posted by Spyglass

Does it make sense that the PCV valve could have cause this?

Not really. But any time you start pulling hoses, pulling plugs, and the like you stand the chance of "fixing" a poor connection, shorting plug wire, or the like. On the bright side, if you can get the problem to go away, even for just a short while, by effectively "fiddling" with stuff, then the problem is not a bad one... it just has to be found. It could all be as simple as a temperamental coil or plug wire that works fine when it's in one position, but is intermittently crappy in another. Back in the old days, if you just had plug wires 7 and 8 resting too close to one another on an FE you could get a misfire.

[FWB]

Originally Posted by patrickt

Not really. But any time you start pulling hoses, pulling plugs, and the like you stand the chance of "fixing" a poor connection, shorting plug wire, or the like. On the bright side, if you can get the problem to go away, even for just a short while, by effectively "fiddling" with stuff, then the problem is not a bad one... it just has to be found. It could all be as simple as a temperamental coil or plug wire that works fine when it's in one position, but is intermittently crappy in another. Back in the old days, if you just had plug wires 7 and 8 resting too close to one another on an FE you could get a misfire.

Damn it i hate agreeing with Patrick........but i must