Engine idle oscillation and odometer

[HybridFire]

ive got a 1996 pathfinder SE 4x4.

 

when i am sitting with my engine idling it oscilates about 300rpm. im just wondering why it does this and how the heck can i fix it.

 

also, my odometer stopped counting at 128k miles. wondering how to fix this aswell.

[Alkorahil]

ive got a 1996 pathfinder SE 4x4.

 

when i am sitting with my engine idling it oscilates about 300rpm. im just wondering why it does this and how the heck can i fix it.

 

also, my odometer stopped counting at 128k miles. wondering how to fix this aswell.

 

 

could be many things. Try checking all of your vaccum lines first to see if they are cracked, frayed on the ends or loose.

up and down engine can also be caused by:

air filter filthy

MAF sensor

EGR valve stuck/bad

clogged PCV

clogged fuel filter

engine temp sensor

IACV-ACC valve

O2 sensors

also check the wires and connectors on these parts for loose/corroded where applicable.

 

 

As to the odometer, does the speedometer work? If it does still work then mot likely you are looking at needing a new cluster meter.