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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 33438
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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Im getting po303 code misfire replaced plugs coil I vac dpfe

Customer Question

im getting po303 code misfire replaced plugs coil I vac dpfe sensor still have misfire on a 2004 explorer sport trac cheked pvc hose look okay
Submitted: 1 year ago.
Category: Ford
Customer: replied 1 year ago.
changed injector #3 fuel pressure sensor also po316 code checked maf sensor swapped out with 2002 explorer
Customer: replied 1 year ago.
really rough idle at 1200 t0 1500 rpms
Customer: replied 1 year ago.
cleaned throttle body egr valve replaced vac soleinoid pulled a vacuum reading was ereratic until rev engine then it would smooth out..it suggested intake vac leak
Customer: replied 1 year ago.
It has been almost 2 days and know response to my question
Expert:  Ron replied 1 year ago.
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
With everything you have already tried and replaced I would run a compression test on the misfiring cylinder and compare the reading with one ot two of the other cylinders. Post back with the results and we can work from there.