I've noticed over the past month or so that when under load (towing a trailer uphill), I feel an occaisional "bump" from the engine and/or drivetrain when I shouldn't feel that--feels to me like a missing engine though the engine on this truck is so insulated I have a hard time discerning this. As far as I can tell, it's not from the road/suspension since it also occurs on smooth roadway. It occurs more when under heavy load than under light load. Under normal driving conditions, I amost never feel this.
I've recently replaced plugs, wires, dist, and rotor, and have done a fuel injector and TB cleaning using 3M stuff (in order to try to make this go away). Rotor and Dist were not OEM. I checked the timing and it's dead on (yes, with the jumpers jumped on the diag port). I've also done a search here and can't find anything related to "missing"...
Anyone know what this could be and what the fix is? My next step would be to replace the dist. and rotor with OEM, but since all are only a few months old, I really don't think this is it. TIA.
Tom
I've recently replaced plugs, wires, dist, and rotor, and have done a fuel injector and TB cleaning using 3M stuff (in order to try to make this go away). Rotor and Dist were not OEM. I checked the timing and it's dead on (yes, with the jumpers jumped on the diag port). I've also done a search here and can't find anything related to "missing"...
Anyone know what this could be and what the fix is? My next step would be to replace the dist. and rotor with OEM, but since all are only a few months old, I really don't think this is it. TIA.
Tom