Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here. The problem may be caused by the pass lock system having lost programming. Start first with trying the pass lock reset. See it in the link below.https://dl.dropboxusercontent.com/u/104923897/Pass%20lock%20Jul%2010.pdfIf after performing the relearn and the problem remains then check to see if you have good spark to the spark plugs, injector pulse at the injectors and proper fuel pressure and post back with which one you are lacking and we can work from there to determine the cause.
Your fuel pressure looks okay and if you are sure you have good spark have you checked to see if your getting Injector pulse?
You can check injector pulse with a standard 12 volt test light by placing the test end of the light on the power side of any one of the injector connectors and the ground end of the light on the other wire and then crank the engine over. If you have injector pulse the light should flash.
The plenum will need to come off to access the connector on the spider to check for pulse.
Power side is the pink wire and the ground switching sides are shown in the wiring diagram below.https://dl.dropboxusercontent.com/u/104923897/Injector%20Jul%2011.pdf