Success, truck shudder solved!
well after toiling with my truck for the last few weeks it is finally running right! for those that don't know i ran new underdog plug wires and all of a sudden around 1800 rpm under load the truck would shudder and misfire. it was running multiple miss fire codes. so after checking the plugs coil and wires for problems and countless hours of head scratching i gave up and went too ford apparently i did everything right but my injectors were bad?! so i has those and my front pinion seal replaced , and the truck runs like a dream.
my question is would new wires foil the injectors or have they just been on there way out and new wires were just the last nail in the coffin, or was it complete coincidence?
and thanks to John and Rick for their help answering earlier questions.
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2003 Ranger Fx4 4.0 TR- DBR long travel, Deaver G50, 305/70R16 MTRs, Supercharged, C4x4 bumpers, super sliders, 10K winch lots of lights and radios.