Just installed an E-Force on my LS2. When I turned the engine to run, without cranking the motor to power up the intercooler pump to fill the system I noticed it said "reduced engine power" on the display. Didn't really think too much of it since I did have the whole top of the motor torn apart, assumed the computer was waiting to see proper values from the sensors.

Tried to start the car, it cranked for quite awhile and didn't fire, again wasn't too awful worried since I dropped the tank to put in a z06 pump.

Figured read the codes to see what they said. P0641 and P0532. Cleared them and they immediately came back without even turning the motor over.

Tried starting it again, fired instantly and idled as smooth as it ever did. DIC still said reduced power. Ran for 20 -30 seconds oil pressure did not come up. I changed oil at the same time so the initial delay didn't bother me. Shut it off when oil never did come up.

Pulled codes again, now 522,532,641.
522 low oil pressure.
532 a/c pressure (irc)
641 5v sensor fault.

Since the 532 and 641 came up before the motor ever turned over, I'm leaning towards electrical and not actually no oil pressure, but no idea where to go from here.

HELP!

 

Check the wiring to the oil pressure sensor and the sensor connector, you may have broke the sensor or pinched the wires, it's at the back of the motor behind the intake/supercharger.

 

Well I figured it out. Edelbrock sent me either the harness or the MAP sensor for an LS3. The 5v and ground are reversed between LS2&LS3.

I hooked my old map sensor to the factory plug and viola! The old codes are gone! Fired it up and 40lbs of oil pressure, engine ran great and very very responsive at idle. After 30 secs or so a check engine light came on. Code was the map sensor. Makes perfect sense since it was just sittin on the valve cover.

Mods feel free to delete this thread unless maybe useful for someone else in the future. 😊

 

Called Edelbrock, they said it is the correct MAP sensor but probably the wrong wiring harness. They are sending me a new one. Where is the IAT sensor located?