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There is a noid light that will check injector pulses from the distributor. It plugs into the injector plug. Most common failure for inop injector is in the distributor module. Also check fuel pressure to see if the fuel pump is operating correctly. It should come on for 2-3 seconds when ignition key is turned to run. Chevy guy denver

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Q: If an 1987 suburban 350 get fuel to the throttle body but no fuel comes out of the injector how do you test to find out if the injectors are bad or the wiring is bad?
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