A friend had someone in the family with a late 1990s Ranger with the Vulcan 3.0L V6. Owner states random misfire. Shop sounded like they went parts cannon with it, it got new plugs, wires and coil assembly. I know the cam synchronizer is a sore point in these. He wants me to diagnose it, the plan is to eke out a few more years out of this until used truck prices or a new Maverick is in range.
My plan was to do a compression check, check for spark, fuel pressure and use the Power Balance test in either ForScan on a Windows PC(if I can find my Carista OBD-II dongle) or download the Ford software for my ThinkDiag2 and run the test from there. I’ll rent the testers from AZ or buy them from HF. I’ve been reading recessed valves or dropped valve seats are a fact of life on these Fords. Am I on the right track to chase down the misfire here?
My plan was to do a compression check, check for spark, fuel pressure and use the Power Balance test in either ForScan on a Windows PC(if I can find my Carista OBD-II dongle) or download the Ford software for my ThinkDiag2 and run the test from there. I’ll rent the testers from AZ or buy them from HF. I’ve been reading recessed valves or dropped valve seats are a fact of life on these Fords. Am I on the right track to chase down the misfire here?