subactive81

[here is a update. I found I had a bad harmonic balancer and a bad tensioner pully. When I replaced there my engine rpm jumped up to 1200 rpm idle. Also I found a evap linw that is not hooked to anything. Im going to try to load a pix of it because i cant find where it goes for the life of me. Also what kind of readings should I be getting from the maf sensor and the o2 sensors?Thank you all again.

also when I replaced the motor I had to change out the intake manifold because the motor was from a newer automatic pathfinder. I also replaced spark plugs wires ect.

also yes i filled the gas tank ran it out of gas and did the math. I have not gotten more than 200 miles on a full fill up, city or highway it stays the same.

sorry its took me so long to get back. I had to hold off on purchasing the o2 sensor and the knock sensor, because of the holidays. I got money now and am going to order them today and hopefuly get them on today. I did not run out of gas but that comment made me lol. Thanks for all the help.

I'm new to this site and was wondering if anyone has any input on my problem. I have a 96 5 speed 4x4 pathy. For the 2 years I have owned it I can seem to get my mpg above 10, and thats hy and city. I tried keeping the Rpm around 2,000 when shifting same thing. If the tank is 21 gallons I have not cleared 210 miles per tank. I do have a bad knock sensor code and when cleared the idle rpm jumps up to about 2,000 rpm. Once the code reapears the idle drops. I am going to replace the knock sensor and the o2 sensor on monday. Is that the right direction. I read of others having good gas miliage then suddenly droping off to about where I am. The pathy also has a newer motor installed about 10,000 miles ago. I still had the same mpg with the old motor. This is driving my nuts as I want to put my 32s on her and give her lift. If I did it now Id run out of gas before making it to work! Thanks for any help.