Glowing manifold only above the O2 sensor

[Bad_Vision]

So i would automatically assume it was running lean but the red hot stops directrly between the manifold and the 2 to 1 down pipe.

Any thoughts im thinking it could be clogged?

I just got the truck so i dont know the history but it runs good but it still seems like its really dogging if i put it in 5th gear it cant maintain speed at the rpms i shifted into it from.

sorry forgot to mention its a 87 4cyl

 

[m3elmo]

i say pull some of the plugs and see what color it's running at. How long has it been since your fuel filter change? Or also getting your injectors cleaned etc.

 

[Bad_Vision]

well plugs are brand new and copper brown fuel filter is brand new and if i had a bad injector it would stutter and i have not had one stutter.

 

[Bad_Vision]

haha wow found a rag in the y pipe