94 nissan pathfinder voltage to battery issue

Have you cleaned the throttle body ? Check the idle air control and passageway . What do you mean by not shifting above 1500 rpm ?

Replace your MAF, its a little pricey around $280.00 or so but this will clear the code but make sure you have the ECM reprogrammed to perform a "learning" sequence since sometimes the code will not clear even though the vehicle will run like new. This reprogramming will most likely have to be a dealer performed procedure.

The car does have a maf, but it is rarely the cause of rough idle. Rough idle is usually caused by vacuum leak, pvc issues, or idle air control valve. What does it do, specifically, and is the engine light on?

sounds like it's running in closed loop. O2 sensor, MAP sensor, or MAF sensor...sensor issues

I notice my 94 pathfinder runs rough and cuts-off acting as if it is fuel starved or it has a bad coil (spark not hot enough). When I jump statrted the car with a 200 amp Battery charger /booster the engine smoothed out perfectly. So, I assumed it is the coil or the wires since I have just replaced the distributor cap and the rotor, replaced the fuel pump and fuel filter less than 200 miles ago, and the car has been sitting most of the summer without being driven. Im checking the vacuum lines and need to consider that the fuel pump, although a brand new Bosch unit could have a problem or somehow the filter is clogged. Miles on this vehicle are unknown but could be 200k judging from the wear and tear , but engine has good compression . It could be the catalytic convertor is clogged, as I have seen cars run this way before (car had a carburetor though) when the convertor clogged to the point of not running at all- could not start it and run for more than 10 seconds at a shot. The last couple of times I have started the car to diagnose the problem, the engine developed a rattle that is audible at low speed(idle and off idle) thru 1500 rpm. Thinking it could be the tensioner on the timiing chain has loosened-up and jumped timing. Lots of things to check- may as well run down every possibility and get it over with.

For this types of problem,there are few help inks to troubleshoot the problem.Click the link below to go through the troubleshooting procedure to resolve the issues :----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html-----------van idles rough? http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html
--------------runs lean and idles rough? http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html
-----------Car still runs Rough after tune up? http://howtobyme.blogspot.com/2011/12/car-still-runs-rough-after-tune-up.html
------------Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed? http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html
----------High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
------------Engine Backfires? http://technoanswers.blogspot.in/2012/02/jeep-backfires.html----------- Nissan stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
---------How to adjust rpm? http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.

check for voltage at the battery with the engine running. You should see 14 plus volts. Now turn on the lights, bower motor, and whatever else you can to put the maximum draw on the battery. If the voltage drops below 13 volts the alternator is bad.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Once you have the engine running, place a volt meter across the battery and measure the voltage while you run the engine at about 2000 rpm. The volt meter should read in the region of 14.5 volts. If it is below 14 volts your alternator is not charging and needs attention. Also, after the battery has been used for a while and you switch the lights on, they should brighten slightly as you rev the engine, if they do not, the alternator is definitely not working.

ur having fuel supply or poor electrical supply problem thats why the engine cuts off underload/ check spark plugs or airflow meter condition as well....

Have the alternator tested. You are providing a low charge to the battery when you jump it and when taking it above 2K RPM requires more amperage resulting in the engine dying and the rough idle