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Old 10-18-2005, 09:28 PM
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troubles with a nissan pathfinder

I can be driving down the road and at 3000 rpms I lose power. I have changed everything under the sun I can think of new injectors new air flow new throttle body new crankcase sensor. The only thing I haven't changed is the computer and brain box. How do I know if the computer is bad I hook it up to the machine and the lights flash all kinds of codes even after I have put brand new parts on it

Chris

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Old 10-19-2005, 02:59 AM
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what codes is it spitting out? i'd suspect any of the potential problem areas it displays versus trying to falsify the ecm itself - i've only seen an ecm go bad ONCE in my lifetime, and that was because of a use of cheap electrolytic capacitors that leaked and ate away the traces (and even at that point it was limited to mitsubishi-made ecm's manufactured between 1989 and 1992). mitsubishi doesnt make any ecm for nissan - unisia jecs does. so what codes did it display?
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Old 10-19-2005, 06:33 AM
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it said the mass air flow was bad the crank sensor was bad o2 sensor was bad I changed the injectors . It still shows the sensors are all bad after I put brand new ones in it. What would be causing this type of problem?


Chris
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Old 10-19-2005, 09:41 AM
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What you are doing is chasing codes and replacing parts because of the code, which may or may not be a bad part the code is referencing. Sometimes when you get an error code some part is off spec as far as what the computer is looking for. That doesn't mean the sensor is bad. I had a buddy who once owned a Nissan Pathfinder with a similar problem. It would just quit for no reason, and sometimes would not start for no apparent reason. This happened all under warranty thankfully. The dealership finally fixed it, but he could not really get an answer he really liked about what they did, so he sold the car. I do know it was an electrical problem unrelated to computer or sensors...for what it's worth.

Vince
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Old 10-24-2005, 09:17 PM
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are you erasing the codes after you do the work. if not they will stay there a long time.those things are alot different to work on than most computers. this is a problem i had with a pathfinder and found that it had sheered off the key in the front pulley. just a thought. good luck.
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Old 03-29-2006, 05:22 PM
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Hey did you ever get to the bottom of your problem? I just bought a 95 and it has almost no power BELOW 3000rpm. I have replaced all kinds of crap and still no power! My computer is clean.
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Old 03-29-2006, 05:31 PM
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my dad's '02 Frontier did that. the pathfinders and the Frontiers both have the same recall for free replacement in any salt bearing state ( NY, maine, ect... ), it is a fuel pump that has a bad case and the terminals corrode and don't work right, so the pump dosn't work right and causes hesitations and all that good stuff. My dad got rid of his Frontier because it was a POS, got a '72 C10 in place of it.
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Old 03-29-2006, 05:47 PM
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OH MY GOODNESS! This is the first I have heard of this. Its does hesitate sometimes and the plugs were kinda white indicating a lean condition. Im going to dig into that this weekend. This pathfinder was to replace my 77 c10 Wait.. are you talking to the guy that originally posted this? Well it don't matter.
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Old 03-29-2006, 06:12 PM
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Quote:
Originally Posted by weirdbeard
OH MY GOODNESS! This is the first I have heard of this. Its does hesitate sometimes and the plugs were kinda white indicating a lean condition. Im going to dig into that this weekend. This pathfinder was to replace my 77 c10 Wait.. are you talking to the guy that originally posted this? Well it don't matter.
the thread starter, I was talking about.
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Old 03-29-2006, 06:50 PM
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Yeah.. my pump is in the tank anyway. I'm going to set this thing on fire!
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Old 03-29-2006, 06:52 PM
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Quote:
Originally Posted by weirdbeard
Yeah.. my pump is in the tank anyway. I'm going to set this thing on fire!
with my dad's there was a secondary pump in the line, it didn't go bad, the truck cleared itself up, but we found the recall in TSB reports by Nissan.
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Old 03-29-2006, 11:58 PM
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hey thanks for the info. I am still having trouble with it I will check into that though. I also changed the stuff for the smog control and it seemed to run a little better. But i will definatley look into the fuel pump.

Thanks
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Old 03-30-2006, 07:08 AM
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Shoot it and build a HOT ROD!
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