Fuel pump test
Pro
Joined: Aug 2004
Posts: 581
Likes: 0
From: Charlotte North Carolina
You should hear the pump come on with ignition only, not the start position. Have someone put an ear to the gas filler area when you key it to ignition only, again do go all the way to the start position. If no sound, you have a wiring/relay issue or a bad fuel pump. No answer to the problem yet.
If the listener hears it come on, test the fuel pressure at the fuel rail schrader valve. If no fuel pressure, then likely problem is a clogged fuel filter or crimped fuel line.
I own an 85 and have the GM shop manual. It describes the entire process for testing the system. If the 84 is the same as the 85, I can further help you.
If the listener hears it come on, test the fuel pressure at the fuel rail schrader valve. If no fuel pressure, then likely problem is a clogged fuel filter or crimped fuel line.
I own an 85 and have the GM shop manual. It describes the entire process for testing the system. If the 84 is the same as the 85, I can further help you.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by game on
You should hear the pump come on with ignition only, not the start position. Have someone put an ear to the gas filler area when you key it to ignition only, again do go all the way to the start position.
Up until you said to try it again turning the key to the start position. Remember, too, that turning the key to the "ON" position only runs the pump for about 2 seconds. To repeat the test the key has to be "OFF" for 10 seconds, or more.
RACE ON!!!
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Originally Posted by CFI-EFI
To repeat the test the key has to be "OFF" for 10 seconds, or more.
You'll hear the relay click off, then you can key on again.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by CentralCoaster
You'll hear the relay click off, then you can key on again.
RACE ON!!!
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Originally Posted by CentralCoaster
Real quick,
Which one is terminal G btw?
Which one is 12 volts?
Which one is ground?
000000
000000
I'll check my Helm book when I get home.
Which one is terminal G btw?
Which one is 12 volts?
Which one is ground?
000000
000000
I'll check my Helm book when I get home.
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