Question about 1999 Dodge Ram

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Code 303 in my 2000 doge 2500 it says cilinder 3 misfiring . what causes this? looks like its leaking around plug # 3

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  • 256 Answers

A Bad spark plug Or spark plug wires, All so a bad fuel injecter can do it,

Posted on Dec 07, 2012

  • Martin Lua Dec 10, 2012

    yes it help me to fix the problem , thank you so much.

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Posted on Jan 02, 2017

boysor2933
  • 293 Answers

SOURCE: my car is misfiring in 4 cilinders and it lost power some times

Check the ignition timing. Check the cables for leaking voltage through cracks in the insulation, or check for very high resistance. Check the distributor for cracks.

Posted on Jun 02, 2009

  • 63 Answers

SOURCE: I have a 2003 doge ram 2500 4x4 and is showing

Very small emmission control system leak.

Posted on Jun 04, 2009

bonedivers
  • 1140 Answers

SOURCE: 2002 Dodge Dakota 6 cyl.replaced plugs ditribitor

Check vacuum lines going to evap canister for cracks or splits, causes to much raw air intake.

Posted on Sep 17, 2009

wireguy212
  • 1627 Answers

SOURCE: 1999 dodge 2500 5.9L gas #4&#7 randam misfire

I would start with a new set of plug wire and plugs.

Posted on Oct 25, 2009

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P0303 code cilinder 3 misfire


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Copyright OBD-Codes.com

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Hello, i can seem to get rid off a missfire in my ford explorer 4x4 4.6 v8 from 2002. i changed the plugs and it ran great for about ten minutes, then it started miss firering again. it is even worse on...


If your coils/wires are on the correct cylinders then, with the truck running unplug your alternator if the truck runs smooth then you have a short inside the alternator causing change in electrical current, if this is case replace alternator.

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The PCM seems to be very sensitive to misfires.

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I have a 1999 mercury villager that has a slight misfire P303


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go here for more help

http://groups.yahoo.com/group/villagerquest/

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1997 k1500 5.7l po303 misfire on cylider 3 ...


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1999 jeep cherokee 6 cylinder engine light


1.Plugs
2. Vacuum leak
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Thats the list of things to check.
This is a #3 cylinder misfire.
There is also TSB about #3 injector needing added heat protection. This could definitely be the cause. I start at plugs and go from there.
Hope this helps.
Thank you,
Lee

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