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Anonymous Posted on May 02, 2013

Why doesn't it charge at idle?

Wont charge under 950 rpm,s over work,s fine under alt turn,s offstep on gas turn,s on new alt an battery

1 Answer

jack layton

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  • Chevrolet Master 5,569 Answers
  • Posted on Apr 28, 2016
jack layton
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Joined: Nov 12, 2014
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It depends if the system is RVC/regulated voltage control. If so, there are about six modes of operation. One is, "fuel economy mode". In that mode, the targeted generator out-put is 13 volts and battery state of charge is greater than 80%. There are two other conditions.
Is there a battery discharge problem? Does the instrument cluster give charging system message or warning lamp?
Any charging system trouble codes? My info on your charging system is limited.

5 Related Answers

Anonymous

  • 55 Answers
  • Posted on Oct 19, 2008

SOURCE: 96 dodge ram 3500 diesel

Check the large probably 100 amp fuse under the PDC cover. Is this a 12 valve or 24 valve engine? If it's a 12 valve, it may be a bad crank sensor. It tells the PCM to turn on the ASD relay which supplies power to the alternator field.

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Anonymous

  • 4669 Answers
  • Posted on Feb 27, 2009

SOURCE: 1998 Express van Turn signals

You loose all turn signal lights outside? Do they blink on the dash?

BLAZZ81

Matthew Albert

  • 281 Answers
  • Posted on Mar 07, 2009

SOURCE: chevy astro van turns over but wont start when

Check to see if the fuel pump is kicking in,
when you turn the key on without starting the van you should hear it kick on for about 2 seconds,

It could be...
A clogged fuel filter...
Blown fuse for the pump..or bad pump relay..
No gas
Bad fuel pump

joyellowhors

  • 303 Answers
  • Posted on Feb 04, 2010

SOURCE: 2000 chevy express 1500 van having starting issues

Start with fuel system. Listen for fuel pump humm at fuel tank No humm check wiring to pump for power. Then check for spark at plugs and wires. Remove wire from coil and hold near engine and see arch when you crank. No arch. Replace ignition Modular inside distributor cap or cap or rotor

Anonymous

  • 326 Answers
  • Posted on Mar 15, 2010

SOURCE: air bag light wont go off after cycling 04 chevy express

YOUR VEHICLE HAS DETECTED A FAULT IN THE AIRBAG CIRCUIT IT WILL HAVE TO HAVE CODE RETRIEVAL DONE TO DETERMINE WHAT CAUSE LIGHT TO STAY ON,I URGE YOU TO DO THIS SOON AS WHEN AN AIRBAG SYSTEM HAS GIVEN A FAULT CODE AND TURNED ON THE LIGHT THE SYSTEM IS DIABLED AND WILL NOT PROVIDE PROTECTION IN ACCIDENT

Testimonial: "I tried what you suggested, and it worked the light cycled an went out thanks , david"

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is the engine running at 800 rpm or more.
if engine RPM is way low the Alternator will die out.
trans light , where is that? name it. exactly
lets focus first on the engine, and RPM
does the dash have a tachmeter, ? yes, then use that.
we keep a hand tachometer (optical , ready for no tach cars)
RPM is everything.... maxwells laws. and such.
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2: belt to ALT not slipping'
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Charging system voltage low

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4: wiring to ALT bad.
5: bad battery or its connections, (wires)
6: bad fuse. see fuse link a11? on fFM page 20?
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8: battery temp sensor bad. making PCM think battery overheats.
the fSM covers all tests above.

pick car here, then pick charging.
5 alternators used on the 5 diffr.engines. got the wrong one?

the see wiring diagrams at end and chapter 20 inside, charge.
pdf page 118 for gas engine, if diesel next few.
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Wont Start

Your alternator should put plenty of voltage out at an idle, you might take it out and have it checked.
Most local parts houses have the equipment to check them without charging you.
If the alt is not working your car will run until the battery goes dead and alot of cars wont run without a charged battery and alternator not working.
You might also have a problem with the voltage regulator, or I should say that that is where your problem may lay.
Good luck
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