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

2002 Dodge Dakota

Tiny

ao7777

July, 31, 2012 AT 1:15 AM

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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3 Answers

Tiny

ASEMaster6371

July, 31, 2012 AT 1:25 AM

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

Tiny

ao7777

July, 31, 2012 AT 1:34 AM

Do I need a compression Tester and which cyn hole? #3? How do I do a compression test?

Tiny

ASEMaster6371

July, 31, 2012 AT 2:16 AM

Remove the plug. Unplug all coils. Crank engine with tester installed and read the readings for us

Roy

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