The 'check engine' light came on during one episode, and the code indicated 'random misfire'. So, we had a complete tune-up, since the mileage was approaching 100K. However, it's experiencing the same symptoms.
We've also changed the fuel filter, serviced the transmission and added a transmission additive to improve performance of the torque converter. Nothing has helped, and since the check engine light no longer illuminates under these conditions, there are no codes to help.
Could it be something in the valve body? Is this a common problem with this generation Suburban?
Since receiving the engine tune-up, it occasionally idles rough when warm. Any connection? Ideas of what to try next?
have the same problem?
Thursday, May 20th, 2010 AT 9:33 PM