I have been having trouble getting the car to stay running after i shut it off after driving. I do not have any codes present, and the problem is very intermident. Today i had the fuel pressure guage connected as well as my scanner and here is what i found.
1. Fuel Pressure drops down to almost nothing while engine is losing power.
2. Once engine stops running pressure returns to normal.
With scan tool recording i noticed when it is about to stall the following PIDS.
1. GM.ENGINE.12SOL_OPEN_SHORT aka 1-2 Solenoid open/shot to groung reads YES
2. GM.ENGINE.23SOL_OPEN SHORT aka 2-3 solenoid open/short to groung also reads YES
When compared to earlier recorded logs these always say no, so can someone give me any ideas what this could be. Also i just replaced the iac valve, and also removed the throttle body for a complete cleaning.
