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I have a 2004 Chevrolet Silverado I am getting the battery not charging message I replaced the alternator and battery. When I crank and run my truck it seems to be idling really low to the point of wanting to cut off. Sometimes it does cut off and that's when I get the battery not charging message when I am on the gas it is fine it is when I am idling or slowing down, can someone help me?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: engine wants to die and idles rough when slowing down and you can smell gas

the throttle body is probably gummed up. You need to buy some throttle body intake cleaner and clean the throttle body. After you've cleaned it up, recconnect the battery and it should reprogram the engine's idle and your problem should be solved. It's pretty easy.

Posted on Feb 10, 2009

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SOURCE: Idle Problem when you slow down of come to a stop idle goes low

THis has happened to me in the past. My fix was to clean the throttle body. The problem began after my battery died. The computer was defaulted back to its original settings after replacing the battery. Once I cleaned the throttle body, everything was fine. This happened at about 85,000 miles.

Posted on Mar 13, 2009

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SOURCE: 2001 chevy silverado 1500 v8 battery drain after sits for 1or2day

, do a simple test on the charging system...check battery voltage. should be 12v or better. start engine & check volts at idle, no accessories on. volts should read 13.5 -14v. Turn on all accessories(including headlamps on high) volts should drop slightly but should not creep down. Definitely not below 12.5. If voltage drops lower than 12.5, the regulator (in the alternator) is not working. either change regulator or change entire alternator. Alternator drive belt should have sufficient tension so that alternator cannot be turned easily by hand. If it can, check belt tensioner.

Posted on Mar 18, 2009

  • 9 Answers

SOURCE: My 1989 Daihatsu Charade CLS (3 Cylinder) has a low idle

The E-brake light is on because the brake is slightly on, or the fluid is low, or the brakes are failing It sounds like the fluid is getting low from normal brake wear and not a problem. Just get the front brakes cheched and replaced. Don't put any fluid in because the new brake pads which are thicker will take up the space the fluid has dropped and push the fluid back to the correct level

Your engine is shutting down at idle because of a a bad seal on the engine induction system. It is the big duct that connects to the engine air intake. Leave the car running at idle, E-Brake on, and squeeze the big black duct going from the air filter to the engine, Does the car shut off? Next check small little hoses that attache to this big air duct. Try moving them a little to see if the engine runs different.

If these are good then I would shut off engine and remove this duct. A hose clamp holds one end. A slotted srewdriver will work to remove this clamp. The other end, at the Air Filter simply unclamps by hand.

The Throttle Valve is the first thing you see in the engine, it is inside the intake just after the duct you removed between the Air Filter and Intake. Have some one open the Throttle by stepping on the gas pedal and see if it is clean around the edges. If not, use some cleanning alcohol from your medicne cabinet to clean this area. A toothbrush will get into the tight spaces. Wipe clean with paper towel. Autozones sells a special cleaner called Throttle Valve cleaner spray. Use this not Carburator Cleaner.

If it still runs bad a idle the idle valve could be dirty and now you need more tools to remove it and clean too.

Posted on May 27, 2009

kb8dns
  • 494 Answers

SOURCE: 04 silverado P0446 low idle

Sound to me like the computer has gone into "limp" mode, it is working just good enough to make it to a repair center. At this point it needs to go on an analyzer and make the necessary corrections then the computer will have to reset it self. Some analyzers can get rid of the bad code and the computer will come back by it self. But something has gone bad and the computer is compensating for it.

Posted on Feb 11, 2010

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1 Answer

Why do alternator charge sometime and sometime don't?


From what I know about it you crank the car with the battery. When the car cranks the alternator supply's voltage to run your car and recharge the battery. I would think your alternator is working all the time your car is running. If you think it is not take the negative cable off the battery that way the alternator is the only voltage supply. If your car shuts down you know there is a issue with the alternator. Measure voltage with the cable off battery that will tell you what your alternator is putting out.

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14 volts is close (14.5-14.8 volts is required
and 9 when shut down indicates a bad battery
have it load tested and then have the alternator tested for rectifier pack operation
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There's a possibility that the alternator isn't putting out power to charge ththe battery anymore. To do a quick test, start the car and while it's running, remove the negative battery cable. If the car dies, the alternator isn't working anymore. If the car stays running, there's an electrical problem in the system somewhere.

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i would have the battery checked out 1st, it could very possibly have a bad cell in it. if battery checks out ok, then have the alternator checked out.

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sound like the alternator is going bad.that could be your cranking problem.if alternator dont keep battery charged.the battery will be too weak to crank truck.

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Ck the charge rate at the battery posts. The proper range is 23.6 to 14.2v , The higher the voltage the llower the amps. Ie; at 13v Alternator is about 10% under capacity. @ 12v it is charging at max capacity. @ 15 v isthe alt is not charging but frying your battery. 9amps is ok if battery is fairly charged but at start up it should sit on 13-13.6 volts. for about 15 seconds the start climbing to less charge towards 14.2.

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