2004 ranger check engine light

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Mar 23, 2008 | 09:32 PM

deronyv8

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From: Calfornia

2004 ranger check engine light

I have a 2004 ford ranger with the 3.0 v-6 and almost 80,000 miles. manual tranny. My problem all started last night i was driving home and the check engine light came on. It is ideling really rough now. I got a hold of a scan tool and it was showing a code of p304 wich means it is missfiring on number 4 cly. I put a new set of autolight plantium plugs and reset the code. no change still idels rough. At freeway speed it seems to run ok. Also every now and then the check engine light starts to flash. Any help will be greatly apreciated. Thanks fellow ford fans.

Deron Siegel
San Diego CA

Mar 23, 2008 | 10:33 PM

aquajock

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From: California

From my understanding when it flashes it means there is a chance you are messing up a catalyst component

Mar 24, 2008 | 06:57 AM

scottm

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Could it be a sticky injector?

Mar 24, 2008 | 09:33 AM

freirefishing

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From: Clearwater, Fl

id replace wires as well

Mar 24, 2008 | 08:57 PM

deronyv8

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From: Calfornia

put a new set of wires on today and that not make a bit of differance. dont know how to check the injection. if any one could point me in the right direction that would be great.

Mar 26, 2008 | 12:29 AM

deronyv8

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From: Calfornia

found out today that is a valve seat that went bad. was a common problem now ford has an impooved head for it

Mar 29, 2008 | 11:42 AM

aquajock

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Did you take it to the dealer or troubleshoot on your own?

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Apr 2, 2008 | 10:46 PM

aquajock

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From: California

I took my truck to the Dealer today and just got a call that I have low compression in #6 and that it is a problem in my valve train. From this they say that I need a new engine because I have a 120,000 miles on the truck. They don't recommend just fixing the head.