[98 Pathy 5speed idles up]

ive cleaned the TB twice and still the same result.

[98 Pathy 5speed idles up]

idle goes up to 1500-2000 when coming to stop and stays 6-7secs before returning to normal 750. And also noticing my throttle sticks at times. No SES light. please help!!

[98 Path 5speed idle's up and down]

Crazy enough it fixed itself.

[98 Path 5speed idle's up and down]

98 Pathfinder 5 speed idles up and down. Sometimes when coming to a stop or when pulling off. Its periodically when it does this, but here lately getting worse. Changed temp sensor, plugs/wires, replaced horrible leaking valve cover gaskets both sides, fuel filter, air filter , cracked vacuum hoses, overflow reservoir and pcv valve. Also cleaned MAF sensor and throttle body. Could this be an IAC issue TPS or sticky throttle body. Please help Ive been dealing with this for 5 months now.

[98 Pathfinder Idle's Up and Down when stopped]

Thanks. I will try it

[98 Pathfinder Idle's Up and Down when stopped]

If thats the case with 3.3 not being able to relearn it. How do you go about it with the 3.3? Just go by what the FSM say's??

[98 Pathfinder Idle's Up and Down when stopped]

I will def try what the FSM says. Ive heard that the idle relearn doesn't work on all r50 pathfinders. Do you know if thats true?

[98 Pathfinder Idle's Up and Down when stopped]

I'd check the IAC. Go by the fsm procedures. Heck maybe the plug has some debris or corrosion from being open for 3 weeks. Could try cleaning it.

 

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What is the fsm procedures?

[98 Pathfinder Idle's Up and Down when stopped]

I was afraid of that. Ive got a Haynes service manual and in the troubleshooting section it say. "Engine lopes while idling or idles erratically." This is what it says in the manual. https://www.pinterest.com/pin/474426141977788853/ It says to check PCV valve it might be plugged up. I put a new one in and it made the idle worse. It idles at 1200 or more, up and down all around and never settles down to factory idle @ 700-750 rpm's. Checked for vacuum leaks also. No SES light so I cant run the codes. I tried to post a picture of the trouble shooting section from the service manual but I don't think I uploaded it right, I will check the MAF.

[98 Pathfinder Idle's Up and Down when stopped]

Ok wrong again. Didn't fix. Back at trying to find the problem. I'm stump.No ses light so no codes to check. Ive tried the spraying carb cleaner to find a vacuum leak and nothing. Maybe a relearn or something? I have a 98 and dont know if i can do that on mine. Replaced valve cover gaskets 3000 miles ago to fix both leaky sides. When I put it back together and ran it for 3 weeks with a check engine light and low idle, sometimes wanted to die on start up after sitting all night and not realizing i didnt hook the electrical connector up to the IAC valve for that period so I had to tear it back down again and hook the IAC up. Ran perfect except now this idle issue of all of a sudden at red lights my idle just jumps up from normal 750 to 15-1600 and may or may not come back down to normal for a few seconds or when it wants too. No SES Light!

[98 Pathfinder Idle's Up and Down when stopped]

Ended up being vacuum hose on bottom of EGR backpressure transducer valve. Hose was loose.

[98 Pathfinder Idle's Up and Down when stopped]

At times it runs perfect. Other times it does this. When coming to a stop I push the clutch in and the rpms shoot up to 15 to 1600 and will stay or at times it comes back down to the normal 750. I can also be sitting at a red light idle will be normal then all of a sudden the rpms shoot up to 1500 or so and it might stay there or it might come back down. I'm affraid it might be my IAC valve sticking or something. Is this possible? Please help!!!!!!