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frank, Chevrolet Technician
Category: Chevy
Satisfied Customers: 3420
Experience:  33 years experience,24 years of Chevroler/GM experience and training .ASE Recertified Master Tech,
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1988 Chevy truck: 305 tbi fuel Injectors..Fuel pressure..throttle body

Customer Question

1988 Chevy truck 305 TBI fuel Injectors have no spray. Fuel pressure is plenty at throttle body. Why would both injectors stop working.? Worked day before.
Submitted: 10 years ago.
Category: Chevy
Expert:  frank replied 10 years ago.
The distributor does 2 things, suppies spark and a rpm signal for the computer. If you disconnect the wire assembly at the distributor the purple with white tracer is tach signal.A test light hooked up tp battery positive will give a voltage signal to the computer. on that wire. Rapidiy taping it and the computer will thing its running-the injectors will spray and the fuel pump relay will come on. If thats the case you have a bad ignition module.