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

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