I recently replaced my spark plugs and changed my oil and filter. Immediately following with 1st start up, engine started rough, but immediately smoothed out. Within 1/4 mile of driving, the traction control shut off and read service traction control, service stabilitrack. Within the next 1/4 mile I stopped at a stop sign and the Check Engine Light (CEL) came on. OnStar gave the following codes P03000, P0171, P0174, multiple engine misfires, and (obviously) traction control malfunction. It seems to run down the road fine, but when stopped or in park the vehicle idles very roughly up and down, almost to the point at times of near stalling and almost chugging. Next, I replaced all 6 coils, after which I unhooked the battery to clear out the CEL codes. I have only driven about 10-15 miles since the coil replacement, but the CEL has not yet come back on, but the vehicle continues to run just as rough as before and the traction control system continues to shut itself off and on and give the service traction control, service stabilitrack messages. What is my next option?
have the same problem?
Saturday, February 22nd, 2014 AT 10:58 AM