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Why does the fuel pressure tester gauge needle flutter?

2006 saturn ion 2.2L when i hook up the fuel pressure tester and turn the key on it show 51 psi when the engine is running it show 60 psi and the fuel pressure tester gauge needle is flutter what cause it to flutter? when i turn the engine off the needle drop from 60 psi to 47 psi in about 20 minutes do it suppose to drop like that?

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  • Saturn Master
  • 3,497 Answers

Yes.. that's normal pressure regulation for the system..

Posted on Aug 10, 2017

  • Joe Russell Aug 11, 2017

    how do i know i am getting the correct reading when the gauge needle is flutter or bounceing?

  • Robert Wood
    Robert Wood Aug 11, 2017

    According to the way the pump is signaled a fluctuation can be normal . Engine vibration can cause this if the gauge is against the engine while running . For twenty minutes the drop is not bad . If it dropped that much in two minutes it would be a concern . How much does it drop over several hours ?

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SOURCE: Car stalls when oil pressure drops...20 minutes to restart

No it is a fail safe. When your oil pressure drops below (on most cars) 30 psi your computer will shut your fuel pump down until you either let it sit for a while and it resets or until oil pressure builds again. Sorry!

Posted on Mar 11, 2009

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SOURCE: cranks normal wont start

fuel pump or filter.

Posted on Apr 01, 2010

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Most likely it's a fuel pump relay. It's on the panel under the hood.

Posted on Apr 17, 2010

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SOURCE: I have 87 ford ranger

Hi, I believe you have a leaking injector(s). Check and/or replace. Good luck.

Posted on Jun 17, 2011

Ironfist109
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SOURCE: just replace 3 liter vtec



  • P0335 is a Crankshaft sensor which is located behind the crank pulley a bit and down. Pull the connector and replace it. This basally helps the computer to direct the firing based on the positions of the pistons. Of course you want to check the connections on this and make sure it looks good before replacing it.

  • The P0135 is the bank 1 sensor 1 Oxygen Sensor. They don't work right until they reach somewhere around 600 degrees and if they don't reach that temperature they don't function. Then your fuel/air ratios is off. Bank 1 Sensor 1 is the first sensor running off the exhaust on the same side as cylinder 1.

  • The 3.0 1996 Honda firing order is indicated by the diagram I uploaded below.

ironfist109_70.gif

  • Based on the diagram the first Oxygen Sensor off cylinder 1 needs to possibly be replaced. Check to make sure the connections are nice and tight and not corroded.

  • After replacing an engine I always like to put new sensors in (like the Crankshaft Position Sensor) while it is sitting in front of me to avoid the getting to them after installation.


  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Posted on Sep 02, 2011

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