Hi all,
I own a Cobalt SS Supercharged 2006.
The car is supposed to boost up to 80 kpa (12 psi) stock, but for some reason my boost is limited to 20 kpa (3 psi) at WOT.
Whenever I bypass the wastegate solenoid, the car boost to 12 psi at WOT without any problems.
This leaves me wondering whether it's the ECM that does not command 100% duty cycle at WOT for some reason.
Commanding 100% duty cycle shuts off that valve (allowing full boost).
By bypassing it I disable ECM control over the supercharger (I get full boost in this case).
I would like to monitor my wastegate solenoid duty cycle.
I don't own the HPTuners setup, but have a ODB reader and Torque app,
that allows to enter custom sensor PIDs to monitor.
Let me know if anyone knows the correct PID to monitor wastegate solenoid duty cycle on Cobalt SS lsj (or even LNF, it could be the same).
My intercooler pump is working, so IAT2 temps shouldn't be the reason ECM would limit the boost.
I've recently started to monitor my air intake temp after the supercharger (IAT 2, sensor PID: 222006),
and after reading over 170-180F IAT2 I realized that my intercooler pump is not working.
We've replaced the pump (I can see the intercooler fluid burbling), and now IAT2 is at the levels of 140-150F.
Thanks,
Slavik