2006 tahoe misfire at idle and noise at idle

[nonickatall]

I would remove the valve covers to check if there a loose rocker arms, which can show a failed hydro lifter.

A clogged cat can cause misfire, because the engine can not get rid of the exhaust gas which leads into bad firing.

I would also exchange ignition coils, to check if the error alternate as well. Also you can do that with injectiors

 

[Dustyhd05]

I would remove the valve covers to check if there a loose rocker arms, which can show a failed hydro lifter.

A clogged cat can cause misfire, because the engine can not get rid of the exhaust gas which leads into bad firing.

I would also exchange ignition coils, to check if the error alternate as well. Also you can do that with injectiors

Thanks for the ideas. I’m going to removed the rockers on number 7 and check and see if the lifters and cam is jacked because it is a hard miss on 7 and 2. I have swapped coils and injectors already and doesn’t move.

 

[nonickatall]

You don't need to remove them, just check if they feel loose and have play.

 

[555hp]

Thanks for the ideas. I’m going to removed the rockers on number 7 and check and see if the lifters and cam is jacked because it is a hard miss on 7 and 2. I have swapped coils and injectors already and

 

[nonickatall]

You don't need to remove them, just check if they feel loose and have play.

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