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My 2005 Pacifica codes say it's running also has a crazy misfire seems to be.

Posted by Terrell Galloway on


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SOURCE: engine misfire code multiple cylinders, starts

There are quite a few things that can cause this.
Check your fuel pressure to start. 55 psi key on is good.
Also make sure it dosen't fall back down should hold at that psi with out engine running.
Aslo the intake's like to leak air around the gaskits which will cause a miss fire.
Aslo the mass air flow.

Posted on Jun 22, 2009


robert wales

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SOURCE: I got a p0300 code what can it be it seems to be runing riche is a 07 pacifica

this code is a random misfire code so it could be any cylinder. it could be plugs, plug wires, coil, fuel injector, poor compression(on this year probably not), vacuum leak by intake to head. places to check.

Posted on Mar 02, 2015

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I got a p0300 code what can it be it seems to be runing riche is a 07 pacifica

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Hi Justin
you seems that you have a good idea about engines and injection systems, lets say that the computer see's rich exhaust and pulls back fuel mixture. creating misfire. why the engine is misfiring on one cylinder only??
my advice to you
1 search for a vacuum leak corresponding to the misfiring cylinder, like a manifold gasket or injector seal.
2, do a compression test for all cylinders, probably you have a burnet valve.
Good luck and let me know how it goes.

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Sounds like your EXHAUST SYSTEM to me...

Check out your parts & prices before going in.. RockAuto Parts Catalog

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He cat.convertor is getting red hot and the spark plugs r black.....but bet of my knowage no codes found t

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I have a 97 k1500 that is burning fuel like crazy, it is running very lean, and seem to be misfiring often. I've change the spark pulgs and found that the entire left side 4plugs was black with suit. The...

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