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Discussion Starter · #1 ·
I bought a 03 murano AWD had a cylinder 3 misfire. Changed all 6 spark plugs and coil packs still having the issue when I hit 2700 rpm.. obd reader poping code p0303. Can this be fuel injector? Not what I've fixed already
 

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I bought a 03 murano AWD had a cylinder 3 misfire. Changed all 6 spark plugs and coil packs still having the issue when I hit 2700 rpm.. obd reader poping code p0303. Can this be fuel injector? Not what I've fixed already
Why would a fuel injector work normally until the engine speed reaches 2,700 RPMs? Fuel injectors (and ignition coils for that matter) are commanded to fire at specific times based on input signals from crankshaft and camshaft position sensors. It may be worthwhile to take a closer look at those.

BTW, did you check the misfire counters for each cylinder in mode $06 to see if other cylinders are misfiring albeit not enough to trigger a DTC?
 

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Discussion Starter · #3 ·
I have no idea what you said but Im going to learn what $06 mode means via Google.. thank for the tips I will look at the 2 sensors you mentioned In the morning.. A nissan specialist said it was definitely cylinder 3 to replace the spark plug and coil pack on this cylinder so I did.. trouble cleared until I hit 35
 
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