Cylinder Misfire - Possibly running rich
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Cylinder Misfire - Possibly running rich
I have a 1999 Accord EX with the 3.0L V6 and 136k mi. Here's my situation: Pulled codes P0300, P0302, and P0303. I've just replaced the cap & rotor, confirmed good spark on all plug wires. Some carbon deposits on all spark plugs (Denso KJ16CR-L11, 12k miles on plugs)
Compression
Approximately 180psi on cylinders 1-4 and 6
80psi on cylinder 5
From searching, most of the people with misfire issues replace the cap, rotor, wires, and plugs to start. I think mine are in good shape. I'd appreciate some diagnositic advice before I do any more tinkering or spend any more money. Thanks.
Compression
Approximately 180psi on cylinders 1-4 and 6
80psi on cylinder 5
From searching, most of the people with misfire issues replace the cap, rotor, wires, and plugs to start. I think mine are in good shape. I'd appreciate some diagnositic advice before I do any more tinkering or spend any more money. Thanks.
#2
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I think it's rather obvious you have a compression problem on cylinder #5. You're going to want to buy a Helms or take it to a Honda dealer/good mechanic if you can't do this stuff yourself.
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P0300 Random Misfire
P0301 Cylinder 1 Misfire
P0302 Cylinder 2 Misfire
...
P0306 Cylinder 6 Misfire
P0301 Cylinder 1 Misfire
P0302 Cylinder 2 Misfire
...
P0306 Cylinder 6 Misfire
Last edited by Balrog; 04-03-2006 at 09:08 AM.
#6
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Originally Posted by Balrog
I know that a compression problem with 5 is obvious. But why would I get a P0302 and P0303 instead of a P0305?
#9
Originally Posted by 98CoupeV6
Denso plugs are fine. I'm interested as to what is causing the low compression...I haven't heard of a case of really bad compression like that on the J series.
could the head gasket cause it to leak ?
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Originally Posted by flyromeo3
could the head gasket cause it to leak ?