Check compressions, replace plugs, if one or more are very black and sooty you will have a miss fire on the cylinder due to excessive fuel. (Leaking injector) faulty spark or low compression, is the coolant level low? If the plug looks a dirty rusty colour you may have a coolant leak into that cylinder, the white smoke is also a sign of coolant burning.
November, 26, 2011 AT 4:27 AM
No coolant lost it also uses alot of fuel will reply about plugs tomorrow could the O2 sensors be bad?
November, 26, 2011 AT 5:29 AM
Could be and also check for a faulty coolant sensor.
December, 7, 2011 AT 12:56 AM
Ok changed plugs wires cap button code says first random miss fire cleared then misfireing on cylinder 5 code cleared back to random missfire any ideas
December, 7, 2011 AT 1:11 AM
YOU NEED TO TEST FUEL PRESSURE, COMPRESSION, SPARK, ECT READING. AND INJECTOR PULSE WITH A NOID LIGHT.