Quote:
Originally Posted by LTZluminaguy
Yes the fuel pump does come on and run as soon as you turn the key, as I said earlier there is good fuel pressure. Since the Service Engine Soon light is not staying on, would there be anything showing up with a scan tool, I throught that light would have to stay on for there to be anything showing up on computer/scan tool.
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Unlike a cheap 'n' crappy code reader, a scan tool will show all the activity on all the sensors, pending codes that haven't actually turned on the SES light, etc.
Having fuel pressure at idle or key-on, engine off does not guarantee that you don't have a defective check valve or appropriate volume from the pump.