[Sscrash]

New to the forum folks I have an 07 murano 3.5 just replaced the alternator and got it all back together now it starts and then dies almost like its running out of fuel I can pump the gas pedal and it revs like its gonna stay running but eventually falls off and dies again

 

[Pilgrim]

What you need is a diagnosis...don't start throwing parts at it.

Start by looking for trouble codes.

Check your air filter and fuel filters; what you describe sounds more like fuel than spark..

Also run a voltage test on the battery and charging system. Check Google for how-tos.

 

[Sscrash]

No coded

What you need is a diagnosis...don't start throwing parts at it.

Start by looking for trouble codes.

Check your air filter and fuel filters; what you describe sounds more like fuel than spark..

Also run a voltage test on the battery and charging system. Check Google for how-tos.

No codes outside of tpms front left tires wont run long enough to test new alternator but battery is currently hooked to auto charger so as soon as it drops below 12 volts it kicks on

 

[Pilgrim]

I suggest you get a real charger on it and put a full charge in it before trying again. If you have a fully charged battery it won't matter whether for a few minutes the alternator is charging or not.

So far the symptoms point to fuel or air as the problem, not electricity.

 

[Sscrash]

Yeah that's where I am at had it on a real charger before moving it to the booster while in the vehicle for testing just hard to believe losing a fuel pump at the same time as an alternator

 

[Wolfgang Huang]

Maybe a stupid question but why did you change the alternator?

 

[Sscrash]

Vehicle died got it to the shop charged battery started tested alternator producing 11.42 volts

 

[Pilgrim]

11.42 is two volts too low. The alternator must put out more than 14V when it's first running. After it has run for a while and the battery is charged the voltage may drop slightly, but it simply must charge at about 14.4 volts at startup.

Funny - we've had more than one report of replacement alternators not charging properly. What was the supplier for this alternator?? I'd favor NAPA as the source for a remanufactured alternator, since dealers are very expensive. (I don't replace alternators with new ones, it's too easy to rebuild an alternator.)

 

[Sscrash]

Yes napa and just removed it and had it tested and it makes 14.4 on test 3 times in a row got the starting and dying issue figured out mass air flow was causing it to die with no code but alternator still charging below 12v

 

[nitely]

How old is your battery? If that alternator is only putting out <12 volts while at idle its a bad alternator. I would return that and get it from another store like AZ. All you are doing is draining your batery until it completely dies.

 

[I need coffee]

Yes napa and just removed it and had it tested and it makes 14.4 on test 3 times in a row got the starting and dying issue figured out mass air flow was causing it to die with no code but alternator still charging below 12v

If your new alternator bench tested fine and you're measuring basically battery voltage at the terminals when it' s in the car then check for a blown fuse on the fusible link attached to the battery positive cable.

 

[Sscrash]

Thanks for everyone's help figured it out it was the plug the 3 pin or brown wire which is the alternator igniter wire was not making connection put another pigtail on it and bam 14.4v drops to 14.06 with headlights radio and heater on high

 

[I need coffee]

Thanks for everyone's help figured it out it was the plug the 3 pin or brown wire which is the alternator igniter wire was not making connection put another pigtail on it and bam 14.4v drops to 14.06 with headlights radio and heater on high

Just to confirm, the problem was with the brown wire (Terminal 3; L circuit)? That's the circuit for the battery charge warning lamp. I would think the connection problem would be with the yellow/black wire (Terminal 4; S circuit) since that connects to the voltage regulator. Anyway, thanks for the updates and it's good to hear you fixed the problem.

 

[Sscrash]

Yes it was the brown wire terminal 3 it's the wire from the key that excites the alternator and starts charging

 

[CHUCKZ88]

Thanks lads, I've had a similar experience with my 2007 nissan murano last night. Changed a new alternator and new battery but only drove for 2 hours and the battery light came on and it just died on the road. I will definitely relay all the info I've learnt from you'll to my mechanic and hopefully he will fix it soon.