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Need help with 1970 Riv electric fuel pump


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The fuel pump on my 1970 Riv is weak, only 1.5 lbs of pressure. I'd rather not drop the fuel tank to replace the factory pump. Instead, I'm thinking about an aftermarket electric pump in line (serial) with the weak factory pump. The car is in the process of restoration with lots of go fast goodies. If I can get the fuel pressure up to 5 or so lbs at the carb, I think that would be perfect for the hungry 455. Any thoughts? Thanks!!

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uh- i'm not sure, but what makes you think your '70 model has an in-tank pump? trace the fuel line from the carb down the side of the engine. i bet you'll find a mechanical pump on the side of the engine...<P>allan

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Allan is correct, they didn't use electric fuel pumps back then. Unless someone modified your fuel system. Even then, it's rare that they would use an in tank type. <P>The standard replacement pump will give more than adequate pressure at the carb. Unless you've got a clogged "sock" in the tank. This is not uncommom with a 30 year old vehicle. <P>------------------<BR>George C. Thomas<BR>70 GS 455 12.teens<BR>86 GN Low 13's/ high 12's

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The 70 Riviera (69 too) used an electric fuel pump in the tank. If you pull back the trunk covering you should find a metal plate that is held on by about 7 maching screws. Once you remove the plate, you will have access to the top of the gas tank. You may have to go under the car to remove the fuel hose and to disconnect the electric connector plug. Then you should be able to get the pump out through the hole in the trunk once you remove the difficult circle clamp for the guage/pump assembly.<BR>You may find that part of your problem is the nylon sock has become hard with varnish from over 30 years of sitting in fuel. <BR>I hope this helps.<BR>Mark

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Mark, my apoligies....<P>I stand corrected. I pulled out the '70 shop manual (as I should have last night) and there it is. <P>------------------<BR>George C. Thomas<BR>70 GS 455 12.teens<BR>86 GN Low 13's/ high 12's

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well, i said i was not sure :)<P>why the hell did they do that? there is room on the side of the engine for mechanical pump...<P>odd ass buicks. i love them so smile.gif (along with my caddies, big ponchos and studes, 100% oddball)<P>allan<BR>

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