2007 Chevy Tahoe. 196000 miles. Lately its been having a rough idle. Engine light came on and stabilitrack warning came on then shut off.
Checked the error code which was P0300. This is an emission system exhaust error. Brought it to my mechanic and he checked it again and said # 8 cylinder was mis firing.
Changed plug wire, coil and injector on 8. Still has the misfire. We are currently running Techtron through the fuel system. He wants me to do this 4 times. If this doesn't help he said I probably need a new motor. He said by the time you do valves and lifters a new motor would be a better option. I'm at a loss, other than the misfire and stabiltrack going off the truck runs great. Any thoughts out there?
Thanks,
FL