anybody else have any ideas? a little desperate here, wanna make sure before I blow in a hole in my pistons.

 

put it on a dyno

 

PULL THE FARKING PLUGS.

 

Put a wideband meter on it and check it under full load from 5000 to 8500 rpm. If you measured a less than full throttle the mixtures will be leaner than full throttle.

 

and what am I looking for on the farking plugs? I just installed new ones last week and threw out the old ones. and is installing a wideband is the only way to tell if I'm running lean?

 

wide band or go to another dyno. this reading is way to wrong

 

you could have the dyno shop to pull the primary 02 and measure the a/f at that point to get a true a/f. the primary does not control the a/f for WOT (open loop) conditions so the performance won't change. it only control the a/f in close loop conditions.

some shops will add a 02 bung in the header for a/f readings, but that's hard core...