I have a 95 nissan pathfinder. recently replaced alternator and battery. ran for a couple weeks. now will not stay running after it is started. battery drains after it is started. battery has been checked at oreilleys and check good. alternator tests good on their tester but in the car i drop voltage when it starts and runs. it wont run around the block and i have to charge the battery after it dies cuz it wont start again. after we installed the alternator we had it tested at oreillys and when the engine was revved it showed 13.5v and said good. oreillys said to put alternator back in vehichle and bring it up. problem is, it wont run long enough to get there. any ideas? thanks
Re: 95 pathfinder wont stay running and doesnt charge
Check all grounds running from all electrical, If there is not a good contact this problem will occur, when you locate the ground surface take sandpaper or even a knife and scrape or sand the connector and the ground surface then reconnect it, It should return to normal if not then it could be a solenoid possibly but not sure
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Most likely yes. If you can charge the battery (get it tested after charging as well) up a quick way without any special equipment to find out if your alternator is charging is with as many electrical loads turned off as possible (heater/a/c blower, headlights,heated seats,stereo etc...) Start the engine (after battery is charged) remove one of your battery cables while the engine is running, if the engine immediately stalls your charging system is not charging. If it stays running it is charging. Do not reconnect cable until you turn the engine off to prevent damaging the alternator.
If it stalls the most likely reason is the alternator. There are still other things that may prevent it from charging. Many alternators are regulated by the computer so it could be a computer or a wiring issue or even a blown fuse. If you can remove the alternator without much difficulty then remove it and take it to a auto parts store and have them bench test it. Last but certainly not least make sure your cables are clean inside and out. An alternator cannot charge a battery with poor corroded connections.
run the fault codes and check for injector problems
batteries have no set life ( that is what the warranty is for--- new batteries regularly fail at the end of the assembly line ) so if could be failing
have a load test on the battery
Have an accredited auto electrician check the output of the alternator to check it and the voltage regulator
low battery voltage will upset the ECM program
First try and spray down the spark plug wires with some water from a spray bottom and see if the start arcing (you must have the truck running at all times to test this). If not that then clamp off the return fuel line and see fi anything vchanegs. let me know from there.
Make sure you check the belt alignment,if it is not running true it can cause excessive heat and early failure.. You should also check all your battery connections including the ground strap to the body from the frame,Last have the battery load tested....
First thing you should have done was check and test.NOT REPLACE PARTS.Did you test the battery to determine it needed to go? Had the starter failed to turn the engine over? The Alt supplies current to run the vehicle ,and keep the battery at the proper state of charge. How did you decide on ign wires verus the other ign components? Did it start and run okey ,before you added the after market alarm? If yes, I guess you know where some of the issues are!