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Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Chevy
Satisfied Customers: 15478
Experience:  Have owned a repair shop for 25 yrs.
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I have a 1987 chevy pickup truck that when i turn the key to

Customer Question

I have a 1987 chevy pickup truck that when i turn the key to the on position the pump's left or right run constantly. as soon as i turn the key switch to the crank position the pump stops.any idea? must be some connection,switch or relay . im stumped.
Submitted: 1 year ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 1 year ago.

Hi, My name is ***** ***** for the delay.

I will do my best to assist you

the fuel pump runs all the time with the key on but doesnt run when the engine is turning?,,is that correct?

Customer: replied 1 year ago.
Expert:  Tim's Auto Repair replied 1 year ago.

from the way youn explain//it sounds as if you have one of two posible problems

1-the fuel pump relay

2-the ecm[engine computer itself]

Expert:  Tim's Auto Repair replied 1 year ago.

the feul pump should only come on for 2 seconds when you first turn the key on,,then,run all the time the engine is turning

Expert:  Tim's Auto Repair replied 1 year ago.

if the relay isnt sticking,then i think you will need to replace the ecm,,it is sending wrong signals to the relay

Expert:  Tim's Auto Repair replied 1 year ago.

thanks

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