Power Loss

[Fredovsky]

Hi, first, sorry for my english, my primary spoken language is french.I'ill try my best to explain my problem

 

My 1994 automatic Pathfinder is losing power at random time. When I start it, everything is ok. but when the engine start to normaly heat, the pathfinder lose power. Then I push the pedal gaz to maximum, 2 or 3 sec later the rpm goes high but the speed is ridiculus. sometimes like 30 miles a hour at 6000 rpm... Sometimes thought, I can drive 1 hour straight without any problemes. but then I stop the truck 5 mins, and when I start it back and begin to drive, the probleme is here. Or I drive 5 min, stop 5 min, then start it back and the probleme is also here.

 

I hope I made myself clear.

 

Can it be the plugs ? Gaz filter ? also im kind of a begginer with mechanic, I am learning.

 

Thank you

 

Fred

[Astroc2002]

Hi, first, sorry for my english, my primary spoken language is french.I'ill try my best to explain my problem

 

My 1994 automatic Pathfinder is losing power at random time. When I start it, everything is ok. but when the engine start to normaly heat, the pathfinder lose power. Then I push the pedal gaz to maximum, 2 or 3 sec later the rpm goes high but the speed is ridiculus. sometimes like 30 miles a hour at 6000 rpm... Sometimes thought, I can drive 1 hour straight without any problemes. but then I stop the truck 5 mins, and when I start it back and begin to drive, the probleme is here. Or I drive 5 min, stop 5 min, then start it back and the probleme is also here.

 

I hope I made myself clear.

 

Can it be the plugs ? Gaz filter ? also im kind of a begginer with mechanic, I am learning.

 

Thank you

 

Fred

Well I'll tell you what it sounds like, if your Pathfinder is equiped with an Automatic Transmission like mine. You might have to take it to a transmission specialist, because it sounds like either you have a gear that's gone bad or the torque converter may need to be replaced. I should know, because I've experienced the same problem in mine... twice.

 

And it could also sound like that computer is adjusting the fuel mixture, hints the possibility to you engine dropping RPM's much like mine. Now has your check engine light been on? Because I've experienced a similar problem on my Pathfinder.

Not sure, because I'm not a certified mechanic and I'm not there to experience this problem your having, but I can tell you what I have experienced on my Pathfinder sounds almost the same thing your experiencing. So if there's any mechanics on here that can answer his questions better than me, feel free.

Edited February 18, 2010 by Astroc2002

[adamzan]

How old is your 02 sensor? On these trucks the classic sign is that it starts to act up when the truck warms up. Mine did something similar a little while ago.

[Fredovsky]

Yes, the check engine light been on for a while now. forgot to mention.

 

Thanks for your replies. Ill check the 02 sensor first and probably replace it. If it doesn't work, i'll think about the transmition. I thought it could be the transmition also. but I just hope it is someting else

[Astroc2002]

Yes, the check engine light been on for a while now. forgot to mention.

 

Thanks for your replies. Ill check the 02 sensor first and probably replace it. If it doesn't work, i'll think about the transmition. I thought it could be the transmition also. but I just hope it is someting else

Yeah I hope so too man, because transmission work isn't cheap. But if it turns out to be the transmission you and everyone else might look into this company, they make performance for Nissan's. http://www.importperformancetrans.com/

 

Good luck man. :coffee!: