'95 3100, has a random misfire at idle. I have not noticed it at any rpm above idle. You can really feel the misfires hit, and the RPM on the tach drops slightly everytime it misfires. Seems to not happen so much when cold (at all?). Digital EGR codes are lit up (history). So is a transmission range switch error (history).
Previous owner replaced lots of things, probably trying to get rid of the same misfire. Coils are new. Plug wires are *probably* new. Not sure about plugs. I tried to pull a plug, and the boot just would not budge no matter how much I pulled. I might need to get some wire pullers or something.
Exhaust smells like fuel and you can hear the misfire clearly.
With the randomness it almost has to be ignition related. Current plan of attack is to check plugs to see how new they are. If they're new, the plug wires are probably new too. (they say champion on them, and look fairly new.) If everything else is new, it makes me think maybe a crank sensor problem.. Thoughts?
Previous owner replaced lots of things, probably trying to get rid of the same misfire. Coils are new. Plug wires are *probably* new. Not sure about plugs. I tried to pull a plug, and the boot just would not budge no matter how much I pulled. I might need to get some wire pullers or something.
Exhaust smells like fuel and you can hear the misfire clearly.
With the randomness it almost has to be ignition related. Current plan of attack is to check plugs to see how new they are. If they're new, the plug wires are probably new too. (they say champion on them, and look fairly new.) If everything else is new, it makes me think maybe a crank sensor problem.. Thoughts?
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