07 Ford F150 PO303
truck runs good except when I go over some high hills, when I get near the top, engine starts to misfire. what would make the engine misfire only when at higher altitudes?
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Related fault codes
P0303
Comments (3)
Anonymous
2015-01-23 17:51
fuel pressure was checked at Ford dealer--they said it was fine. this misfire stops when I go down the hill
Anonymous
2015-01-24 13:12
the specification for fuel pressure is in PSI, it is not bad-fine- good. needs to be checked going UP hill- maybe drive with a scanner and observe FT's going up hill.
ONly 1 code and that is P0303 fuel pressure- thinking it has been struggling and dropping as you work your way up the hill, to easy a test to ignore. Also the code is for #3 cylinder did you check for spark at plug? A scanner will let us look at FT's especially when code set- freeze frame data-