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replaced module, fuel pump, crank sensor,sensor in the dist, tried various coils known to be good, fuel pressure reg, cranks but dies, unresponsive to throtle position
Vehicle: 2000 Chevrolet express 350

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P0336 Crankshaft position sensor A circuit range performance / performance

P0122 Throttle position sensor / switch A circuit low input

Yes you can test the TPS sensor which you should measure its reference voltage,Also check that the ENG 1 which is a 20 amp has power and the fuse is not open.

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