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1998 gran prix 3.8 supercharger how pressure is the fuel pump supposed to put ,

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  • 16 Answers

This depends on the supercharger being used. Have you read the recommendations from the supercharger manufacturer? You will have to adjust the fuel-air ratio as well as the supercharger will need more fuel for the added air flow.

Posted on Nov 15, 2014

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Posted on Jan 02, 2017

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SOURCE: how do I change the fuel filter for a 2002 pontiac Gran Prix

Release the fuel pressure by loosening the gas cap, raise and support the car on jack stands,squeeze the plastic tabs on the male end of the connector,and pull the connector apart.Some models have 2 tabs,and others have 1 and the fuel line screwed into the other side.Remove filter mounting bolt,unhook tab from frame and remove filter. when you put in the new filter, make sure the arrow is pointing toward front of engine.On the line with plastic tabs, just push on till you hear a click, then pull on it to make sure it's latched.Don't forget to tighten gas cap.

Posted on Jan 24, 2009

ewashmidas
  • 362 Answers

SOURCE: Fuel pressure

With the 3.1 engine: Ignition on 52-59 psi, at idle 42-56 psi. With the 3.8 engine: Ignition on 48-54, at idle 38-51. Let me know if your's is supercharged the specs maybe different.

Posted on Jan 24, 2009

  • 3 Answers

SOURCE: will start then dies

On the regals they have a ceramic resistor on the passanger side under the fender. It heats up and over time it tends to brake and the wire inside tends to rust away. The fuel pumps run in 2 different speeds. Had the same problem. Dealer only part yet the car would run and you would think it was the fuel pump. Turn the key it kicks on then start and dies out. Ceramic on the pass side would need replaced. It is white about 2-3 inches long or so held on with 2 bolts i do believe. Ill find a bulliten i found online to help me diagnos the problem. :) hopefully this helps someone out instead of spendin $$$ that ya cant afford with the recession eh?

Posted on Apr 01, 2009

daves944
  • 1050 Answers

SOURCE: Buick Regal dying

You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.

Posted on May 11, 2009

dennymulford
  • 1055 Answers

SOURCE: 1998 GMC Sierra- runs rough then stalls when

had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!

Posted on Jun 06, 2009

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You most likely have a bad fuel pump resistor, which controls 2 speeds of the fuel pump.

To check to see if this is the problem, there is a trick you can do and its very easy to do. Go to the attached link, and bend the tab my finger is pointing at and then plug it back in. If your car starts and runs fine, well we just solved the problem.

Link ->> http://www.boredandstupid.com/relay.jpg

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My car needs a fuel pump,I was told to just replace the fuel tank


Your pump is not compatible with the supercharger pump. The pressure rates are much high for a supercharged engine. Your normally aspirated engine requires less fuel, thus, a smaller capacity pump.

You may want to check under the rear seat to see if there is an access hatch to remove the fuel pump/sending assembly. Then dropping the tank would not be an issue.

I would not suggest putting a used fuel pump into any vehicle. A new one should be available for 50-100 dollars. Also replace the strainer at the base of the fuel pump when you replace the pump.

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1 Answer

Fuel pressure


With the 3.1 engine: Ignition on 52-59 psi, at idle 42-56 psi. With the 3.8 engine: Ignition on 48-54, at idle 38-51. Let me know if your's is supercharged the specs maybe different.

Jan 23, 2009 | 2001 Pontiac Grand Am SE

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