running real bad

[crazygn]

Ive been having this problem for some time now, and just dont know what it is. I can only get about half to 3/4 thottle out of the car any thing more and iam getting real bad knock , even got 13# today and backed off as fast as i could . I had my fuel press at 42psi w/ vac off but it was saying to rich so i backed it off more to about 38psi w/ vac off. tps is set at 42-44 , iam running a joe L93 chip. My turbo link says that my batt voltage drops to 6volts when i am getting the knock. I dont know if that is right or not. I can give you more info on the t link if it will help. It also said at 4100 rpm i was at 820 on the o2's. at 38 psi vac off.

be back gotta get some more info if it saved it this time.

 

[Quick6'n'-K.C.]

well, if the voltage drops down like that, check your cables at the battery AND along the way to the starter-- possibly the pos cable smacks against the downpipe under a load-

. tps is set at 42-44 ,

what is it at WIDE OPEN THROTTLE?

It also said at 4100 rpm i was at 820 on the o2's. at 38 psi vac off.

at what mph?

any knock is bad knock, see if it goes away with some good gas
and fix the voltage problem, maybe you have a bad alt, or battery-

 

[crazygn]

I'll check the cable first, i think that was the highest rpm that i ran and the mph was 106mph. but it does this in every gear . I did see 3.40 on the tps but i cant get any thing over half to 3/4 thottle , if i wot it the car slows up , the boost dies and i get knock.