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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Chevy
Satisfied Customers: 3210
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles A6 - Electrical / Electronic systems A7 Heating / Air Conditioning systems
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I have a1987 chevy corvette with no pulse on injectors. I

Customer Question

I have a1987 chevy corvette with no pulse on injectors. I can't find the Obd1 connector so no codes are available. I see12v on both sides of injector connection, thinking on a bad pcm or short to power. Please help
Submitted: 7 days ago.
Category: Chevy
Expert:  Chad Farhat replied 7 days ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Expert:  Chad Farhat replied 7 days ago.

This is the wiring circuit for the fuel injectors , the injector are pulsed by the ECM

The fuel injector is solenoid operated and ECM controlled. The ECM energizes the solenoid, which opens a valve, allowing fuel delivery. The fuel, which is stored under pressure in the fuel rail, is injected in a conical spray pattern into the intake manifold near the intake valve, Fig. 3.

CLICK ON LINK TO VIEW THE FUEL WIRING CIRCUIT

If you do not mind me asking ,are you looking at fixing this yourself or looking to know the most possible cause of this issue and taking it to repair shop for the work ?

Do you have any prior experience in electrical troubleshooting and testing with a test light for power & ground ?

Do you have a test light & or power probe for testing ?

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Customer: replied 7 days ago.
I do have some experience on mechanics and electrical issues as well. Is it normal to see voltage on both sides of an injector connector? It has to be ground pulses from the pcm right??
Expert:  Chad Farhat replied 6 days ago.

IF you see voltage on both side it means ,we are missing a ground , most like the computer or wiring to it

inspect the injector wire back to the computer

where you able to see the wiring diagrams

Please let me know and we can work on it ,this requires some testing and might require some back and forth with me here

Thank You

Chad Farhat

ASE Certified Technician