how can this be?

[1 RARE T]

Put 10 gal. of 110 oct. fuel in yesterday, went out made a few blasts, everyhing was great. boost only 15psi. fuel at 44 line off. went out today , booted it from dead stop, KR went to 12.9 with o2's at 859. how can it knock like that when it's so rich? also tryed again later KR. at 2.1 with o2's at 779. pulled in garage now fuel is at 40 psi line off what the ....?the other strange thing was that on the first hard run the 1-2 shift was slightly delayed then banged into 2nd. WEIRD.

 

[blackbuick87]

Well maybe your regulator is on the fritz, and maybe your TV cable is out of adjustment. Also you may have a bad FP gauge

What chip were you running? was the knock a spike when you punched it (possible false knock) or on the top end charge (possible rich knock)?