unknown issue

[Rafferty95PF]

So not sure how to describe what is happening. I have a 95 pathfinder and lately it has been having trouble accelerating. The issue started while trying to back up, it is running but moves like a slug then going forward it continues to move sluggish but clears up if I shift to neutral, rev the engine, and shift back. Today it actually died while in drive but at a stop. I was thinking either egr valve or tcc solenoid. I checked the tranny for fluid and smell both were fine.

 

Any thoughts?

[SpecialWarr]

I would start with a serious cleaning of the entire intake , MAF and throttle body. It should be relatively inexpensive and not take more then 2 hours to get them all clean. After that I would be looking at the fuel pressure regulator on the back of the lower intake next to the firewall just to see if it has its hose still attached.

[Slartibartfast]

Does sound like possible EGR to me. First thing I'd check is the vac lines. Cleaning the intake's not a bad idea, the best power boost I ever got from my '95 was when I cleaned the muck out of the throttle body.

[silverton]

Falling on its face huh? That sucks. I'd inspect the MAF wiring (there is a subharness you can buy from Nissan that adds a ground for the sensor) and sensor. Any codes stored in the ECU? Can usually get you close to a proper diagnosis.

[RF600]

Easy to check to see if the egr is functioning properly. With the engine running push up on the diaphram of the egr. If it stumbles, the egr is functioning.

 

I should add. Just because the egr is functioning doesn't mean that something associated with the egr is working properly.

Edited April 29, 2016 by RF600