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It's been timed and retimed 4 times with new components everytime. I know I wouldn't be off that many times.

I have the same problem. Did you get it figured out? I have a 2013 chevrolet equinox 2.4l ecotec vvt. I just rebuilt the engine with new rings, pistons, bearings, cams, rockers, lifters, valves and timing. I have also replaced almost all of the sensors, as well as the cat. New fuel injectors...

I've tried everything to figure this out. The engine has been rebuilt with new rings, bearings, pistons, timing, both fuel pumps, vvt solenoids, both fuel pressure sensors, fuel injectors, plugs, coils, cam phasers and both 02 sensors. It has random multiple misfire at idle and bucks and jerks...

I tried a new throttle body and MAF sensor. Neither were the problem. I just ordered new cam phasers because they are the only thing left that retard or advance the timing other than the ICU.

My daughter's did the same thing after her rebuild. It turned out to be a broken wire by the AC compressor.

I'm having the same problem. I rebuilt my engine do to a burnt valve and the known oil consumption problem. It didn't have the surging and bucking before. Mine starts doing it after the engine is warmed up. I have replaced all the sensors, cat, both fuel pumps and have no codes showing. It's a...

I have a 2013 chevrolet equinox 2.4l ecotec vvt. I just rebuilt the engine with new rings, pistons, bearings, cams, rockers, lifters, valves and timing. I have also replaced almost all of the sensors, as well as the cat. New fuel injectors, high pressure fuel pump, fuel pump in the tank. New...