i just put a new direct port nossle on my 99 LS1 and I am haveing problems with the car hesitating on motor. I have NO clue what is wrong. I have tripple checked all the wirring and made shure everything is pluged in correctly and the car still has a shitty hesitation.... has anyone put a POS kit like this on there car? a little advice would be thinkfull.

 

what injectors are you using?

 

Like Gary said, what injectors are you running?
these kits arnt POS kits, they have there gods and bads like any kit, but the issue seems like your injector isnt spraying straight down, and your getting "puddle" been there,, done that.
for what its worth, i have gone 9.6 |@ 142 with this NOS kit, and gary went 9.3 @ 144 with the same kit. both on small motors. mine is 346 his is 382.

 

This is the same guy that posted about the Noszel kit. I have stock injectors. and i have the injectors aligned with the nozzles.

 

The hesitation is only down low in the RPM.

 

If you didn't have it before then you have one of the injectors not in line with the NOSzle. They must be straight in order for the spray to not be altered.

 

you have access to a wideband and a fuel pressure guage?

do some logging and see if your fuel pressure drops. also see if the car leans out for a split second.

you may be looking at the wrong things.

 

also check to be sure no vacume leaks, i have seen one of the hoses broken befor.

 

stock injectors should work right?

 

yes i think they do, but that doesnt meen they are alighed correctly, or it may be some sort of vacume leak.