Join Date: Dec 2015
Location: Central Alabama
First, junk the LS4, not needed for a supercharged car. Hell, my turbo car is breathing through an LE5 TB that is smaller than the stock LSJ, and my car makes 421 horses...
Second, an auxiliary heat exchanger is not necessary for a 2.8 so long as you have a dual pass and Option B. You need to check for proper intercooler pump function and make sure the stock heat exchanger is there and bled properly.
Your codes are for ( If you had the typo I think you did and actually meant P2138 ) Pedal Position/Throttle Correlation and A/C Pressure Sensor Voltage Low.
Could be part related, could be moisture related. Clean the TB plug with electrical contact cleaner and check your sunroof drains.
2004 Saturn Ion Redline - S256ET | Ported Head
421whp/354wtq @ ~23psi on E30
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, Gone but not forgotten.
Last edited by Rebel Redline; 05-05-2017 at 11:04 PM.