This car starts and runs fine for a couple of minutes. Then like a switch turning on, runs rough. Number 2 cylinder misfiring (P0302). Can pull spark plug wire off of #2 with little or no change. Pulled plug, and it appears fine. Trouble code P0400 indicates EGR issue. Removing vacuum to EGR actuator has no affect. Can engine run fine when cold with bad EGR? Why only #2 misfire? Is EGR stuck open or closed? Can EGR be removed and phsycally be altered to no longer be a "valve"? Are these two trouble codes even likely related? Could the P0400 code be a red hearing and misfire be from something else? What changes in this cars system when it warms up, that would cause it to run rough?
have the same problem?
Sunday, January 9th, 2011 AT 7:30 PM