Electrical connections to pump®ulator
Electrical connections to pump®ulator Looking for some help on the electrical connections to a 99 fuel pump assembly. It is going in a 1978 LS1 TA via a vette works kit into a OEM factory tank.
I know the fuel pump wires are grey and black (heavier gauge black)....the regulator connection has 3 wires...and it states 5 volts on the regulator. Can anyone help with any of this? Thanks
Leon
I know the fuel pump wires are grey and black (heavier gauge black)....the regulator connection has 3 wires...and it states 5 volts on the regulator. Can anyone help with any of this? Thanks
Leon
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That is not the fuel pressure Regulator, That is part of the vapor purge system
Don't worry about connecting it up on your 78.
The fuel pressure regulator is in the module.
see attached photo.
One other modification you will have to make is the fuel level sender. The 4th gen gauge works on 40 - 240 ohm
The 2nd gen gauge works on 0 - 90 ohm.
The Fuel level sensor will need to be changed.
The GM part number for the Fuel level Sensor is 25319676.
sK 1083.
It s available from GM, how ever it pays to shop around. I bought one from Amazon.com
about two weeks ago for $87 with free shipping.
Don't worry about connecting it up on your 78.
The fuel pressure regulator is in the module.
see attached photo.
One other modification you will have to make is the fuel level sender. The 4th gen gauge works on 40 - 240 ohm
The 2nd gen gauge works on 0 - 90 ohm.
The Fuel level sensor will need to be changed.
The GM part number for the Fuel level Sensor is 25319676.
sK 1083.
It s available from GM, how ever it pays to shop around. I bought one from Amazon.com
about two weeks ago for $87 with free shipping.
Last edited by Ollie8974; Jan 15, 2012 at 07:55 PM.
Ollie,
Thank you. I plan on retaining my OEM fuel level sender....but do you have any info on how to change the 40-240 ohm resistor?
Leon
Thank you. I plan on retaining my OEM fuel level sender....but do you have any info on how to change the 40-240 ohm resistor?
Leon
Last edited by reedld; Jan 16, 2012 at 10:08 AM.
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Yes, the fuel level sender has two barbed fingers that hook in to slots on the fuel pump module.
The fingers are locked in place with the white locking tab.
The wire plug is locked in place with the red locking tab, visible at the top of the first photo.
Locking tabs circled in red in photo 3
The fingers are locked in place with the white locking tab.
The wire plug is locked in place with the red locking tab, visible at the top of the first photo.
Locking tabs circled in red in photo 3
Last edited by Ollie8974; Jan 16, 2012 at 09:12 AM.
Yes, the fuel level sender has two barbed fingers that hook in to slots on the fuel pump module.
The fingers are locked in place with the white locking tab.
The wire plug is locked in place with the red locking tab, visible at the top of the first photo.
Locking tabs circled in red in photo 3
The fingers are locked in place with the white locking tab.
The wire plug is locked in place with the red locking tab, visible at the top of the first photo.
Locking tabs circled in red in photo 3
Leon
I never knew they made a 0 to 90 kit. Im gonna go source one of these out now but its just too bad I put the tank back in the car. Oh well ill run it dry and put it in
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Best price I found was Amazon.com $87.00
I bought this about three weeks ago.
GM part # 25319676
SK 1083
The kit comes with two senders.
Depending on what size plug pins is on the module you have use that sender.
actually it is not too hard to re-pin the plugs so you end up with two usable
senders.
