Dodge Caravan Engine Code P0300 and P0303? - Snow Plow Forum -†Let's Talk Snow Discussion Forums
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Old 12-13-2009, 06:19 AM
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Dodge Caravan Engine Code P0300 and P0303?

The Service Engine light came on in our 05 Dodge Caravan P0300 Engine Misfire Detected and P0303 Cylinder 3 Misfire Detected,what do I do?Thanks.
Ron
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Old 12-13-2009, 09:05 AM
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Ron

300 is random misfire which lead to number 5 it can go a few ways anything that can make #5 miss ie Plug, wire, coil pac, injector, vaccum leak and on and on it should be taken to someone you trust because i hate to see you throw parts at it.
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Old 12-13-2009, 12:54 PM
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Thank you Fred.
Ron
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Old 12-13-2009, 06:16 PM
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There was a factory service bulletin on 2005 Chrysler/Dodge minivans with the 3.3 or 3.8 engine related to random cylinder misfiring (P0300, 301, 302, etc.).

It involves replacing the spark plugs and wires, along with a PCM software update. The TSB # is 18-018-04
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Old 12-14-2009, 03:53 AM
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Powersmoke,thank you.
Ron
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Old 12-15-2009, 03:15 PM
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heheh .
just did a used car check today on a 05 caravan.

And like deja vu had a check engine light.
checked the rest of the car over and scanned the puters.
MMMMMMMM PO300 and PO302

Like where have i seen this before.
Thought you'd get a kick out of it.
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Old 02-27-2010, 08:59 PM
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I get #3 misfire on my 97 Grand Cherokee. It comes and goes.
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Old 02-28-2010, 06:26 AM
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Quote:
Originally Posted by SIPLOWGUY View Post
I get #3 misfire on my 97 Grand Cherokee. It comes and goes.
Straight six or V8?
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Old 02-28-2010, 07:28 AM
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Originally Posted by SIPLOWGUY View Post
I get #3 misfire on my 97 Grand Cherokee. It comes and goes.
If its a 4.0 in 97 i was still working for the jeep dealer did a ton of Valve springs and Decarb of cylinders for this problem.

Honeslty Start with Decarb of cylinders first , if problem presists, providing the basics are ok , then a weak Vavle spring is most likly the culprit.
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Old 02-28-2010, 09:14 PM
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4.0 6 cyl. I did the decarb. I think it needs valve springs. As long as the light is off once a year I'm good for an inspection sticker.
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