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Miss firing code cyl 4

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Old 04 Jun 2010, 08:28 am
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Join Date: Jun 2010
Posts: 3
Default Miss firing code cyl 4

I have a 2007 PT 2.4 Aut I bought it with 18K on it at about 20K the engine lite came on.I took it in and they replaced the plugs Well the light has come on eight times know I have 45k on it the dealer has replaced the wires,fuel injector,fuel injector wire,plugs again,coil pack,did a combustion clean.Engine light still came on I was burning premium fuel they told me that was my problem and to go to regular.I have switched now my engine rattles and pings going up hills under exceloration and when the tack hits 4g the engine light starts to flash.The dealer is telling me that this is normal and not to worry un less the light stays on it also idels rough.I disagree with them but they will not do any thing for me.

Does any one have any suggestions?
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Old 04 Jun 2010, 09:03 am
Fanatic Cruiser
Join Date: Jun 2009
Location: Rochester, Michigan
Posts: 674
Default Re: Miss firing code cyl 4

Seems like you have pretty much ruled out ignition related. If the fuel pressure is good (53-63 psi), then look for a vacuum leak...most likely around the plastic intake manifold.
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Old 04 Jun 2010, 09:06 am
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Join Date: Jun 2010
Posts: 3
Default Re: Miss firing code cyl 4

thanks I will ask the dealer to check it out
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Old 04 Jun 2010, 09:36 am
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Join Date: Sep 2001
Posts: 27,747
Default Re: Miss firing code cyl 4

Someone else with the same problem....

code for misfiring cylinder
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