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Mazda Ed
Mazda Ed, Auto Service Technician
Category: Chevy
Satisfied Customers: 2223
Experience:  ASE Master Technician, Mazda Master Technician, GM and Ford factory trained. 15 years experience.
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1987 s10: pickup..relay..the fuel pump or throttle body I

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Ihave a 1987 s10 pickup i have replaced the fuel pump and relay but still have a problem its not getting fire to the fuel pump or throttle body I can run a hot wire to the fuel pump and it will run but the throttle body wont come on I dont find any bad fuses on the fuse panel is there somewhere else to look or do you think I have another problem.



What engine size?

Do you have spark?

Customer: replied 8 years ago.

yes I have spark I can prime the throttle body and it will start

engine size 2.5

Ok, first off either replace or properly check the "ECM B" fuse with a meter. A visual inspection is not good enough. This fuse powers the fuel pump relay and the oil pressure bypass switch. Let me know the results of testing/replacing the fuse and we can continue from there.


Do you have a meter to check voltages?

Mazda Ed and 5 other Chevy Specialists are ready to help you
Customer: replied 8 years ago.
can you tell me where this ECM B fuse would be located

Sure thing! Lower left of the fuse block as shown in the picture below.