So I've posted this on other sites but haven't found anything that helps. So here's the story i bought my dads 96 SS all original only thing is it hasn't been driven in 3 years. So I emptied the fuel tank and put in 5 gallons of fresh fuel and half a can of seafoam. Changed the fuel filter and oil. And it still wouldn't start. After checking the forums found that it was the TDR relay and bypassed it by jumping the purple to yellow wire. Now it starts and runs for 10-20sec and dies like the key gets turned off. I've since then tried by passing the VATS with a resistor but it didn't change a thing i cut the two white wires and put the resistor in and it does the same thing. I also have a cheap scan tool and it doesn't show any codes. I had the ICM tested like 16 times and it passed every time. Hooked up fuel pressure gauge seems to stay around 41 psi. Hooked up a timing light and it sparks as it dies. Hooked up a NOID light and that seems to shut off right before it dies so I'm guessing that is what kills it. I also checked idintifix and they some people had success replacing the ecu I ordered one off ebay with the same numbers and it still does the same thing. Please someone HELP!!!