p308 misfire

[2buyitlow]

97 tahoe 160k new plugs,wires cap and rotor still idling rough with #8 misfire code, recent smog any suggestions what to do next?

 

[2buyitlow]

maybe o2 sensor?

 

[Jounier11]

No o2 Sensor would not cause that, i would say take it to the dealer seems that you got a problem here a really sneaky one :\ , Good Luck and :welcome:

 

[lesterl]

What does the plug look like? How does fuel pressure hold up? Compression on that cylinder?

Plug wet/ black?

Pressure bleed off?

 

[2buyitlow]

follow up ,... problem fixed, spider injector set replaced 700.00 ouch!