Author Topic: Fuel pump install  (Read 120 times)

79steelman

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Fuel pump install
« on: February 11, 2019, 07:42:30 PM »
Anything special I should know when replacing a fuel pump. Looks pretty straight foward. Better to be safe than sorry.

428 78T/A

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Re: Fuel pump install
« Reply #1 on: February 12, 2019, 02:43:22 AM »
Pinch the rubber supply line as close to the pump as you can when taking the old one off with a pair of vice grips or that gas will roll out of there fast. Just make sure the pump arm goes underneath the cam.

81Blackbird

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Re: Fuel pump install
« Reply #2 on: February 12, 2019, 06:21:25 AM »
What 428 78 T/A said plus it makes the install easier if the cam is at the base circle.  You will not have to fight compressing the arm of the pump while threading the bolts.

Grand73Am

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Re: Fuel pump install
« Reply #3 on: February 12, 2019, 02:14:08 PM »
You didn't say what engine you have, and it makes a big difference.

Both the Pontiac and the Olds use an "eccentric" to drive the fuel pump. When installing the pump, you have to make sure that the long arm of the fuel pump is riding on the correct side of the eccentric. The closed, smooth side of the arm rides on the eccentric.

Since the Pontiac fuel pump is installed right side up, the pump arm needs to inserted in the hole so it is under the eccentric. The Olds fuel pump is installed upside down, so the arm rides on the top of the eccentric.

Getting the arm on the wrong side could break something.

They are different from a Chevrolet which has a shorter pump arm and uses a pushrod that rides on a lobe on the cam.
Steve F.

Re: Fuel pump install
« Reply #3 on: February 12, 2019, 02:14:08 PM »
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