No CEL random misfire at idle
#1
No CEL random misfire at idle
2001 d2 with 118k miles on it, well maintained. About a month ago I developed a random misfire at idle while at a stop light or when parked. No check engine light. I was due for plugs and wires so those were changed, as well as coil packs and top end gaskets to cure the leaky valve covers. I haven't noticed any difference in fuel economy. Under load the disco runs fine as it's intended to do. I don't have any mixing of fluids and I have not lost any coolant or oil. Completely leak free. I have not done a compression test yet. Around 200 miles ago I heard a rattle on the on ramp under good acceleration and was thinking it may be the cat? Tapping on either cat doesn't reveal any noises and I only head it one time. Engine doesn't tick or over heat whatsoever so I'm aggregated by this obviously. Any ideas please chime in.
#2
2001 d2 with 118k miles on it, well maintained. About a month ago I developed a random misfire at idle while at a stop light or when parked. No check engine light. I was due for plugs and wires so those were changed, as well as coil packs and top end gaskets to cure the leaky valve covers. I haven't noticed any difference in fuel economy. Under load the disco runs fine as it's intended to do. I don't have any mixing of fluids and I have not lost any coolant or oil. Completely leak free. I have not done a compression test yet. Around 200 miles ago I heard a rattle on the on ramp under good acceleration and was thinking it may be the cat? Tapping on either cat doesn't reveal any noises and I only head it one time. Engine doesn't tick or over heat whatsoever so I'm aggregated by this obviously. Any ideas please chime in.
no one has an idea?
#3
#4
no vacuum leaks, maf was replaced at 89k. Yesterday I did a seafoam induction treatment and fresh fill up with seafoam in the tank. 100 miles later and no luck yet. I appreciate the response. Hopefully going to be able to get some live data in the next few days to see what's going on. Last tank was roughly 30 miles under normal distance so there is now a drop in economy.
#6
the issue was prior to me servicing the coil packs, plugs and wires, and top end gaskets. Tomorrow I have some time and I'm going compression check. I'll post results. Thanks for the help so far.
#8
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Blade Rover
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02-12-2014 12:32 PM