Shutters and jerks as if it is misfiring under load

1999 NISSAN PATHFINDER
165,000 MILES • 6 CYL • 4WD • AUTOMATIC
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RICHARD QUINTANA
  • MEMBER
  • 2 POSTS
I replaced the fuel pump, fuel filter, spark plugs and wires, distributor cap and rotor and cleaned my throttle. Body and master air sensor as well as adding fuel injector cleaning solvent to my fuel. Still shutters and jerks as if it is misfiring under load. The funny thing is it is showing no check engine light and no codes. I am at a loss!
Aug 19, 2018 at 1:43 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,554 POSTS
This sounds like low fuel pressure. Have you changed the filter? Here is a guide to show you what you are in for when doing the job and the location of the filter below:

https://www.2carpros.com/articles/how-to-change-a-fuel-filter

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken
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Aug 21, 2018 at 7:50 AM
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RICHARD QUINTANA
  • MEMBER
  • 2 POSTS
Thanks Ken, the fuel filter was also replaced, but it is still jerking and hesitating.
Aug 21, 2018 at 7:56 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,554 POSTS
Okay, then we need to test the fuel pressure. Here is a guide to give you an idea of what you need to do. You can go to the auto parts store they will rent you the fuel pressure gauge if you do not have one.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Please run down this guide and report back.

Cheers, Ken
Aug 22, 2018 at 2:54 AM
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