dukes91xlt
New Member
- Joined
- June 27, 2013
- Messages
- 3
- Reaction score
- 0
- City, State
- Bellingham WA
- Year, Model & Trim Level
- 91 Explorer XLT
I had to replace the heads on my 91 4.0 and when I put it all back together it hits on all cylinders except #4. The cylinder isn't firing even though there is fuel and strong spark. The spark plug was wet when I pulled it, so I swapped it with one from #6 which was a little dirty. I also swapped the plug wire at the same time... no change. the plug was wet but cleaner! I didn't take a compression test but it seems to have compression in the cylinder. Is the injector drowning the spark plug? What am I missing?
