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Power Strokes
7.3 Tech
miss at light cruise or steady state
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[QUOTE="golfer, post: 391047, member: 266"] I have never seen an IPR cause a misfire...the IPR sends equal pressure to all 8 injectors... JHill~ I would re run the compression test. a brand new engine won't have more than ~425psi of compression... if compression is good, then check rockers/valvetrain...and inj(s). the quiet buzz indicates that there's a problem with that injectors' armature to solenoid clearance...and a poppet valve that was hanging open would cause an intermittent misfire, as well as a very quick drop in pressure when that poppet hangs. [/QUOTE]
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miss at light cruise or steady state
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