Engine Performance problem
1997 Other GMC Models V8 Four Wheel Drive Automatic 189000 miles
Just replaced the engine in my suburban. Now it is idling very rough and check engine light is on or flashing. Replaced the crank sensor. Scan code is showing erratic misfire. Next step to replace the Camshaft position sensor?
Those CPI engines were good for sticking injectors after you disturb them. If you scan th ePCM or watch " misfire data" on a scanner it will tell you which one is stuck. Need to verify this as it may be more than one that is not working. Its a little pricey, but I suggest the updated injector for your Sub, it eliminated the extra valve that sticks, from A/C Delco