Question about Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: obd code p0304
P0304 is actually pointing to a misfire in cylinder 4, not a camshaft sensor problem.
There could well actually be two misfires rather than just one because Ford use a wasted spark ignition system wherein two cylinders are fired at once, one of them on its compression stroke and the other on its exhaust stroke, hence the wasted spark on the exhaust stroke.
You say it is "popping" which would lead me to believe that there is a spark issue rather than a fuel issue, because the popping sound would be the fuel igniting either in the exhaust or the intake rather than the cylinder, and this would be confirmed if you were to run the engine and then switch it off and pull the no.4 spark plug and it were to be covered in fuel.
If you were to find two plugs covered in fuel and the rest ok, then the coil pack feeding those two plugs would probably be the problem.
If only one plug were covered in fuel then either the plug or lead feeding that cylinder owuld probably be the issue.
If none of the plugs are covered in fuel, indicating a fuel problem, and you were to swap the no.4 injector with one of the other injectors, and then the fault code were to change to the cylinder into which you swapped the no.4 injector, then the injector would be the problem.
Very best regards
Posted on Jul 15, 2008
you need to remove door trim panel there are (2) 7mm screws that hold panel on .. 1 is behind the lower red light lens and the other is behind switch panel for the power window switch . remove both screws and remove small black panel above door trim by pulling strait off .(now there are (4) 11mm nuts the hold mirror on 2 are behind the small rubber plugs in front of door that you can see with panel on and the other 2 are under panel that you can see after panel is removed . the wiring need to be disconneced you may have to remove speaker for acess to feed new wiring down into the door good luck
Posted on Mar 11, 2009
Ok here is the solution when I had the exact same problem with my 2001 Ford Escape:
Idler air control valve
EGR vaccum sylenoid
I did all of this work myself (and as a girl it was not hard at all), it cost me around $170.00 for all of the parts, had it done in less than 2 hrs., erased the codes and have not had a problem since then! I hope this helps you out, cuz it sure would have helped me out when I encountered the same problem.
Posted on Apr 09, 2009
dies the truck restart once it cools off? it is very common for th 6.0 to have high pressure oil issues on a hot soak. they will run till the cows come home but once shut off they can not build up enough pressure by cranking speed alone to start truck until it cools down and the seals become rigid enough to bridge the gaps they are sealing in the first please. if this is the case. it may be the STC fitting ojn the back of the high pressure oil pump (intake and turbos must be removed to check) or possibly the branch tube o rings have worn. the branch tubes are located under the valve covers and supply the fuel injectors the oil they need to perform their "power stroke"...
Posted on Jun 06, 2009
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