spark plug change problem

[MyEarsHurt]

Go get the code pulled at autozone or something, then post it in here and someone can tell you what you did wrong...

I have no idea why my post shows up first....i didnt start this thread...strange...

 

[iago]

Help I changed the plugs on my 98 mustang gt and now it's running rough and the check engine light came on. I checked the gaps is there something else I could have messed up in the process?

Don

 

[narongc73]

Help I changed the plugs on my 98 mustang gt and now it's running rough and the check engine light came on. I checked the gaps is there something else I could have messed up in the process?

Don

If you did it one by one hopefully you made sure the cables are snug. Probably one or two cylinders are not running and that would cause the roughness. Just go back and make sure everything is snug. Gaps shouldn't cause that much of a rough idle.

 

[Jay99]

if your gaps are fine and those are the right replacement plugs and all the wires are snapped in then the only other normal mess up is mixing up or crossing a wire or two accidentally.

 

[iago]

Thanks everyone

I'll check it after work today.

Don

 

[kboy262]

I just did mine yesterday on my 98. On one plug I had to unplug the fuel injector harness from the injector to get to the plug. I forget to plug it back in and it ran rough. Just some ideas that maybe you forgot to plug everything in. Also check to see if all your sensors are plugged back into your intake tube.

 

[iago]

Found the problem

Thanks to all who helped it was a valvle cover breather(or whatever the name of it is) that had come loose. Plugged it in and it's fine. Any trick to resetting the check engine light? If i disconnect the battery will it go off?

Thanks again,

Don

 

[GTMomma02]

Any trick to resetting the check engine light? If i disconnect the battery will it go off?

Thanks again,

Don

I had almost the same issue. Disconnecting the battery for about 15 minutes took care of it.