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.
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.
Do I need a compression Tester and which cyn hole? #3? How do I do a compression test?
Remove the plug. unplug all coils. crank engine with tester installed and read the readings for us
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