Tristin_SS_SC

Hey everyone, I am having major issues with my 05 cobalt SS SC, car has stage 2 kit and the LSJ HTV-1320 supercharger in it. The car runs mint while in open loop because it's in warm up mode, but once it starts using the computer in closed loop it bogs out and rpms range from 1000-3000and eventually sounds like a tractor, the car has been HP tuned and has a lc-1 wide band o2 sensor, I have tried every possible pressure test and the car is mint! I put New plugs in and the snap on scanner is reading that the o2s are normal, but that makes no fudging sense! The codes are rpm to high and map sensor short, I replaced the map and that did nothing. I tried unplugging the first 02 and that did nothing, tried unplugging the lc-1 02 and that did nothing, I really need help here! Any one run into this issue?? Can the innovate lc-1 wide band throw off my ecu? Please help thanks!

100% METH

iTrader: (3)

what's vacuum at idle?

If it's not boost leak, or sensor related.
Have some one with HPTuners tune your vehicle.

Tristin_SS_SC

how can I tell if it's a boost leak, at idle the supercharger is at -30 boost is that normal? I'm not use to the sc

jdbaugh1

iTrader: (1)

When you replaced the map did it reset the associated code?

Tristin_SS_SC

It still threw the same code, taking it this week for retune

efren6057

iTrader: (4)

At idle you should be anywhere between -18 and -20 in vacuum ( Hg ) If your seeing -30 at idle then something is very off.

jdbaugh1

iTrader: (1)

I bet you have wiring issues if it is still showing a short for that sensor. Very well could be the cause part of your issues as well.

Tristin_SS_SC

the only code present recently is the rpm to high no other codes, this code is p507

scottie

scottie

What kind of map sensor did you use? I replaced my supercharger inlet pressure sensor with a wells part and it actually put my car into limp mode whereas I just had a CEL on before replacement. delphi or ac delco for those sensors.