Shutters and jerks as if it is misfiring under load

RICHARD QUINTANA

MEMBER
1999 NISSAN PATHFINDER
6 CYL
4WD
AUTOMATIC
165,000 MILES

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!

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,313 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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Tuesday, August 21st, 2018 AT 2:50 PM

RICHARD QUINTANA

MEMBER
2 POSTS

Thanks Ken, the fuel filter was also replaced, but it is still jerking and hesitating.

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Tuesday, August 21st, 2018 AT 2:56 PM

KEN L

MASTER CERTIFIED MECHANIC
48,313 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

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Wednesday, August 22nd, 2018 AT 9:54 AM