Q: Running on 3 cylinders?

asked by on October 25, 2016

My sidekick is only running on 3 cylinder, lots of white smoke, gas fumes, dripping at tailpipe. Tested for head gasket,tests were good. Changed injector,plugs,plug wires,got spark in cylinder its just not firing?

My car has 249000 miles.
My car has an automatic transmission.

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