Question about 2004 Ford F150
Look for a vacuum leak. if you cant find one , check fuel pressure to rule out fuel pump and fuel filter.If they check out ok clean or replace mass air sensor mass air sensor , if none of above solve problem test dpfe sensor it controls your egr valve. if this was helpful please leave good feedback
Posted on Aug 02, 2013
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Posted on Jan 02, 2017
it sounds like the EGR valve is either dirty or has failed, do you lose any power at all, if not then thats a good sign, remove the EGR and clean with carb clneaer only, leave to dry naturally and dont try to dry it or touch it yourself, they often do get dirty as the job they do is similar to that of a turbo with exhaust gasses.
Hope this helps
lastly clean the air mass sensor too, both are easy to do and easy to remove.
Posted on Dec 28, 2010
Testimonial: "Well done"
I have a ford 2003 windstar that was running very rough when cold and almost stalling. engine light came on. went to autozone and they read the codes for free and told me it was running lean on Bank 2 also. i came home searched for the O2 front sensors online using the info autozone gave me. there are 2 front sensors on my car that need to be replaced at the same time. look for ones that have a direct plug in and don't need wire splicing. the ones without the wiring harness are cheaper but more of a pain, i think.
they were fairly easy to replace. getting access with the wrench was the worst. reset the light by disconnecting the battery for a few minutes. seems fine now and the light hasn't come back on.
Posted on Jan 25, 2009
i had asimiliar misfire on my 2000 windstar.the first thing to check is a broken valve spring by taking off the valve cover the other is a o2 sensor bank 2 i believe is the downstream.if not the valve spring then either the coil pack or thecontrol module. either way it is fairly inexspensive
Posted on Mar 08, 2009
Cylinder misfiring hapens when ignition coil is bad and bad spark plugs.
System to lean is usualy when fuel pump lose pressure or you have blown gasket on intake manifold. Check fuel pressure first.
When EGR flow is insufficient there is EGR valve, sensor and solenoid, could go bad., so you have multiple codes P0171, P0304,P0306, P0401
Posted on Feb 21, 2010
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