Misfire HELP!
I posted a while back in a different thread but im creating a new fresh thread to clear things up.
I need to know whats wrong with my engine. Heres the story:
DRY COMPRESSION:
1-140 psi 2-167 psi
3-147 psi 4-140 psi
5-167 psi 6-167 psi
7-167 psi 8-146 psi
WET COMPRESSION:
1-150 psi 2-175 psi
3-160 psi 4-160 psi
5-175 psi 6-175 psi
7-180 psi 8-163 psi
VACUUM:
at ilde: 14 in Hg fluctuates (jumps) by only 0.5 in Hg
at 2000 rpm: 20 in Hg fluctuates (jumps) by only 0.5 in Hg
Problem started after some valves were replaced from my timing chain snapping. I didnt do the work but I bought 3 sets of valves for the shop and they lapped them in themselves rather than taking it to a head shop (I was being cheap). Computer gives a code for cylinder 1 misfire and the engine runs rough on idle and a little smoother at higher rpms.
The shop had the dealer computer hooked up to it and I saw some numbers that looked like maybe knock sensor readings. The only one that showed high numbers (maybe 4 or 5?) was cyl 1. The others were maybe 1 or 2?
All spark plugs have some black soot on the metal part but cyl 1 has black soot on the ceramic part also.
Also I noticed a little bit of oil in the intake manifold where the PCV valve goes into the manifold? When I take the pcv hose off the intake I get a little smoke comming out of the hose while running. I think this is normal.
Please let me know what you think, any insight would be helpfull.
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