Mine was doing this also and stalling bad. I found a broken vacuum line going to the DPFE sensor. The problem came back several weeks later. I cleaned the connections to the DPFE and MAF sensors with contact cleaner. Replaced the DPFE sensor, and found I had a broken clip on the MAF sensor connector (probably the actual problem. If you aren't getting enough air flow, or the computer thinks you aren't from bad sensors or connections, it adjusts the mixture leaner.
The alternator must be removed and replaced from the bottom, as with raising the vehicle high enough to work from underneath "safely".
depends on what way you are testing it but you either have a bad connection between the alternator and the battery or your battery is bad and cant hold the charge what voltage are you getting
I just had my alternator replaced (at a shop). They told me the mechanic had to "rip the entire front end off" to get to it.
The Alternator is not putting out enough voltage. If you recently replaced the alternator with a "new" remanufactured alternator that one could be bad to your truck somewhere to get it tested.
$550 at the dealership. The motor has to be raised up to gain enough clearance to get it out of the engine bay.
It may be the result of a malfunctioning alternator, or simply a loose alternator belt. When the car is idling, the rpm's of the engine are decreased. This means that the battery is putting out energy, but the engine is not moving the alternator fast enough to refill the charge. When the car is moving, the alternator is getting enough power to keep the lights from dimming.
I always replace the battery when replacing a alternator. They seem to fail hand in hand. Next check the battery cables and alternator connections. Also check to make sure the belt is tight enough. If it is slipping then the alternator wont be charging the batttery correctly. It has to be one of these things. Good luck.
i had this happen once on an 03 dodge minivan. the alternator went bad and the battery was going dead but had enough power to get the engine started. once i replaced the alternator and charged the battery the gauges worked again. good luck!
If the bearings in the alternator get bad enough it can lock up.
Your alternator has either stopped working or is putting out less than 14 volts, therefore not enough charge is getting to your battery.
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Same thing happened to me. Replaced the battery & the light went out for a couple weeks; after which it was back on again. This time I took it to the shop & they said the alternator was about to go. I didn't want to "fix" something that was "about to go" so I drove it for about 10 more days before the alternator stopped putting out enough juice to keep the car running or battery charged. Took the car back in & paid to have the alternator replaced. Guess they were right b/c it has worked just fine since. Good luck. It sounds like your alternator is about to go. Same thing happened to me. Replaced the battery & the light went out for a couple weeks; after which it was back on again. This time I took it to the shop & they said the alternator was about to go. I didn't want to "fix" something that was "about to go" so I drove it for about 10 more days before the alternator stopped putting out enough juice to keep the car running or battery charged. Took the car back in & paid to have the alternator replaced. Guess they were right b/c it has worked just fine since. Good luck. It sounds like your alternator is about to go.
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It could be that your alternator is no longer putting out enough charge to handle the load of the AC running. Some auto parts stores offer free bench testing of alternators and some can even test it while it is still attached to your car. I would recommend getting it tested. Also, someone may have replaced the alternator in the past with a lower amperage than is required for a vehicle with air conditioning. Hope this is helpful!
This is not a battery problem. Your charging system, the alternator, is not putting out enough juice to charge the battery until you reach 4000 rpm. Have the alternator and charging system checked.
Not enough belt tension.
Alternator is not making enough power.
Fuel supply... Sounds like the engine might not be getting enough.Fuel filter and/or fuel pump not pushing enough to keep the engine up to speed.See "Related Questions" below for more
You probably have a bad alternator or a battery that is really bad, have the charging system checked out.
This can be due to loose or corroded cables and or connections , and did the car start even at least once after the battery and starter was replaced? If it did you probably need a new alternator or if your handy enough you have the choice of rebuilding the alternator. Many stores offer free alternator testing , I my self have a 96 Taurus and i have had many problems over the years and now I'm at the point where my alternator is bad and i will soon be rebuilding it. If it is none of these issues then there is some thing more serious wrong in which case it needs to go to a mechanic who can determine and fix the issue.
Since it is shutting down while it is running that tells me your alternator is not putting out enough current and needs replaced. You will need to charge the battery fully prior to starting after installing the new alternator or you could burn out the new alternator as well. I.King
No alternator should EVER charge at 27 volts. That's enough voltage to burn up the computer.
Best to get a shop manual for this operation, if you have not replaced it before. Usually there is an "Idler Pulley" on many late model cars that is "spring loaded". You "Bias" this pulley (usually with a socket wrench) so that the serpentine belt has enough slack in it so you can remove it. Then you disconnect the Positive Battery cable, disconnect the "Field Wire" harness and Positive battery lead from the alternator, unbolt and remove the alternator. Reverse procedure to install new alternator. TommyTrouble
Low/bad battery, bad battery connection. If the battery isn't getting fully charged you might not be able to start. If it isn't getting charged, check the alternator.