Brad474747
New Member
- Joined
- Nov 29, 2015
- Messages
- 15
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1994
- Make / Model
- Mazda
- Transmission
- Manual
I've got a misfire from my 4.0 when it's under load. we haven't been able to determine what cylinder. It idles just fine but I've noticed it happens more at operating temperature, and they seem to be much rougher at operating temperature too.
We've checked fuel pressure and it was within spec, it didn't change at all when these misfires happened
We checked plugs and replaced one that was mismatched (1 autolite and 5 motorcraft) the autolite was improperly gapped, the rest looked fine. (they have about 4000 miles on them as well)
Wires appear to be fine, I'm going to test the resistance tomorrow. they only have about 4000 miles on them but I'm being pushed to replace them under warranty and to do the plugs too.
Is there anything else that I may be overlooking?
We've checked fuel pressure and it was within spec, it didn't change at all when these misfires happened
We checked plugs and replaced one that was mismatched (1 autolite and 5 motorcraft) the autolite was improperly gapped, the rest looked fine. (they have about 4000 miles on them as well)
Wires appear to be fine, I'm going to test the resistance tomorrow. they only have about 4000 miles on them but I'm being pushed to replace them under warranty and to do the plugs too.
Is there anything else that I may be overlooking?