ragegt

Ok, I bought an 89 gt that has a 93 cobra motor in it. Ever so often it doesn't want to start. The harness that plugs into the mass air and has the ecm on it has the 3rd wire disconnected from what I guess has something to do with the o2 sensors, not sure though. It will eventually start if you connect it back but dies when you let off the clutch so I have to have someone else unplug it while its running for me. Once its running and unplugged its fine until it decides to happen again. I'm completely lost as to what could be causing the problem and how to fix it. Only mods that I can see is a msd ignition coil, headers, off road xpipe and dumped flows.
Any help would be greatly appreciated!


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