1990 corvette LT1 engine starts, does not come off idle without stalling. Ecm, distributor, map, plugs, wires, etc have been replaced for other problems. Has a weak noid pulse on cranking but does start.
by 
gregorym
ANSWERS: 2
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long shot, but it could be a crank or camshaft sensor getting ready to crap out the timing or advance could be getting screwed at idle
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6-19-2017 It will do that if the connections to the spark coil are reversed.
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