2009 toyota matrix cylinder 4 misfire
10

Asked by Aznsupdude Aug 09, 2020 at 03:50 PM about the 2009 Toyota Matrix FWD

Question type: Maintenance & Repair

My 2009 Matrix having a cylinder 4 misfire (obd2 code
P0304). I replaced all the spark plugs, swapped all the
coils, replaced all fuel injectors, checked the resistance
and voltage on the all the injector plugs. Everything I did
something, the same code kept coming back. I just
recheck my spark plugs again and #4 already have carbon
fouling (the plugs are brand new and I installed them 2
weeks ago). I also did a vacuum leak test with smoke and
didn't find any leaks.

1 Answer
10

Aznsupdude answered 4 years ago

I did the compression test, the results for the dry test are cy1=165, cy2=155, cy3=80, cy4=80. Wet test for 3 and 4 are both 100

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