Mechanics

I GOT A ENGINE LIGHT, P0303 - #3 CYN MISFIRE

2002 Dodge Dakota • 170,000 miles

I have don't nothing yet just used my obdII scanner to get the code. Can it be spark plug, rotor and cap? I don't have compress gage and other compress gages.
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Ao7777
July 31, 2012.



Start with a compression test. It sould be that, plug, coil, vacuum leak or injector. This is why you need a real diag before throwing parts at it.

Roy

ASEMaster6371
Jul 31, 2012.
Do I need a compression Tester and which cyn hole? #3? How do I do a compression test?

Tiny
Ao7777
Jul 31, 2012.
Remove the plug. Unplug all coils. Crank engine with tester installed and read the readings for us

Roy

ASEMaster6371
Jul 31, 2012.