Originally Posted by daveyboy43
That'* what I plan on doing. What other problems could be possible?
If you continue to have a misfire after replacing plugs and wires, the next step will depend on what trouble codes your car is showing. We need to know if it is a random misfire, or cylinder specific. A random misfire could be related to ignition coils, ignition control module, or fuel pump. Cylinder specific could be injectors or internal engine mechanical issues.
We can walk you through how to narrow down the list of suspects, but my guess (if you still have a misfire on cyl #1 after plugs and wires) is a plugged or defective fuel injector. If that is the case, I would start with half a can of Seafoam poured into a full tank of gas to see if that corrects the problem. If that does not work, we can explain to you how to test each injector to see if that is the problem.
2001 Bonneville SSEi (retired at 365,000 Kms.)
2014 Jeep Grand Cherokee Overland (yes, I know its not a GM)