SHELBY GT-40 ULTIMATE Member
Joined: Feb 2007
It could be the TPS, you could check it to see if it's operating right. You pierce the black and green wires and connect a digital voltmeter, and then turn the key on. Slowly open up the throttle and watch the voltage, if it isn't a steady increase or if it drops AT ALL, or even goes to zero, it needs to be replaced.
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