Question about Cars & Trucks
No 2 plug fouling, engine running rough like a miss fire. have changed plugs, leads, rotor, rotor cap. compression tested and all cylinders are between 130 to 150 psi. have checked timing and it appears ok. unsure of what to check next could it be rocker adjustment? as I used the timing light to check firing lead by lead and no 2 cylinder miss fires every now and then.engine miss fire, run on.
Posted by Anonymous on
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Posted on Jan 02, 2017
Before changing you pcm try cleaning your egr valve. remove the valve and see if its stuck in the open position if so use a small pick to clean around the spring.
Posted on Mar 12, 2009
Well it sounds like you've started to do your "due diligence", but there are several things left out. Your problem could be many things. Something as minor as a vacuum hose left off, loose, or in the wrong place. And just because you changed the plugs and wires, don't mean you fixed your problem. Open your hood at night and see if you have any sparks "dancing" around. Another way to check this is to open your hood and spray a soapy water solution on your plug wires and look for sparks jumping around. If so replace your wires. You didn't mention what type of wires and plugs you used. I would reccommend NKG platnum plugs and a Bosch wire. I know this from experience,(the hard way teacher). It could even be the gas you are burning. I've owned a lot of Vettes, and I am the kind of guy who believes they should be driven. If not it's like having a beatiful wife and never taking her to bed.I know a lot of people who only drive them "once in awhile". Sitting in thier garage can cause many fuel problems, condensation, sludge in the carb, or filters etc. This can all lead to the problem you are describing.
Low speed miss- usually plugs
High speed miss- usually wires or valves
intermitten miss, fuel or electrical.
I hope I gave you some places to look to find your problem.
Posted on Jul 07, 2009
Sounds like a blown head gasket,bad valves or bad rings.If this is the only cylinder affected then the head gasket is more than likely the problem.
Posted on Jan 01, 2010
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