we installed a v2 vortech s/c on an 04. On the test drive the a/f ratio's were screwy. Anywhere under full boost the a/f bounced erratically from rich to lean back to rich and so forth. Around 5% throttle (guestimate) it was consistently rich. Under full boost it ran real lean and the car pulled timing and it felt like there was hesitation.

Another problem that may or may not be related is that full boost showed up as only 3 to 4 psi on the boost guage. Autometer phantom mechanical btw. I know its not the most accurate but the car def wasnt pulling like other s/c'd s2ks.

fmu was done by the black box.

another issue that may be related also is that at idle it sounds like inside the blower something is loose almost like a loose bearing. we checked belts and they were at proper specs.

any suggestions. thanks in advance

 

how about not making two threads and getting a real tune.. black box is trash