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.
Here check the procedure and check it again.
http://www.aa1car.com/library/misfire_chrysler.htm
Chrysler Performance Chips
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.
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