Is this normal????? (About the volt meter gauge)

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Is this normal????? (About the volt meter gauge) #624751 07/09/05 05:24 AM

Joined: Jun 2003

Posts: 262

Tygger

Mudrunner

I just noticed today that everytime I floor my Rodeo, the battery volt meter drops from about 14 to 11-12. Is it normal for it to dip down????? Or is something wrong?

1997 Isuzu Rodeo S 4WD

Re: Is this normal????? (About the volt meter gauge) [Re: Tygger] #624752 07/09/05 06:06 AM

Joined: Feb 2001

Posts: 89

Cameron Park, CA USA

PassportMike Offline

Getting the Wheeling Fever

Yup, it's normal. I'm currently on my fourth alternator and they've all done that. I think I read somewhere else on this forum that one of the leads into the alternator tells it when engine vacuum is low (engine revving). The alt then somehow produces less voltage, causing less resistance on the engine.

'97 Passport

Re: Is this normal????? (About the volt meter gauge) [Re: Tygger] #624753 07/09/05 11:52 AM

Joined: Sep 2002

Posts: 326

Schenectady, NY

Canucklehead Offline

Mudrunner

Quote

I just noticed today that everytime I floor my Rodeo, the battery volt meter drops from about 14 to 11-12. Is it normal for it to dip down????? Or is something wrong?

This is discussed in the owners manual (if you have it).

Steve

'97 Rodeo 5spd. 3.2L SOHC V6 4WD

Re: Is this normal????? (About the volt meter gauge) [Re: Canucklehead] #624754 07/14/05 05:26 AM

Joined: Jan 2005

Posts: 81

Arnold,MO (St Louis)

EricW

Getting the Wheeling Fever

I have the same problem with my '96. At first I thought it was an alt. problem but I noticed that the only time that the voltage would drop was when the accelerater pedal was pressed. I was able to find that by turning the park lights or headlights on it would stop this from happening. <img src="/forums/images/graemlins/zombie.gif" alt="" />

1996 Trooper S 3.2 5sp OME919/ProComp ES9000
BFG Dueler A/T REVO 265/75R16 w/Snowflakes
1991 Trooper 2.6 5sp 33x12.5 BFG T/A

Re: Is this normal????? (About the volt meter gauge) [Re: Canucklehead] #624755 07/14/05 08:33 AM

Joined: Apr 2004

Posts: 310

trooperbc

Mudrunner

Quote

This is discussed in the owners manual (if you have it).

where in the owners' manual. what does yours say?

thanks

1992 sohc trooper 3.2l v6 automatic . . . as is

i love a good intermittent electrical challenge. . .especially when it's someone else's.

Re: Is this normal????? (About the volt meter gauge) [Re: trooperbc] #624756 07/14/05 11:32 AM

Joined: Sep 2002

Posts: 326

Schenectady, NY

Canucklehead Offline

Mudrunner

Quote

where in the owners' manual. what does yours say?

thanks

From page 2-8 of the 1997 (1996 as well?) Rodeo Owner's Manual:
"When the accelerator pedal is pressed, when driving or with the engine idling, the voltmeter will drop into the low voltage range. This results from a changeover in alternator voltage control designed for fuel economy improvement. However, the voltmeter needle will not drop if the head lights are turned on or if the engine coolant temperature remains low."

Steve

'97 Rodeo 5spd. 3.2L SOHC V6 4WD

Re: Is this normal????? (About the volt meter gauge) [Re: Canucklehead] #624757 07/14/05 05:12 PM

Joined: Jun 2003

Posts: 262

Tygger

Mudrunner

Didn't think something like that would be in the owner's manual, but thanks anyway. Glad that its normal...

If I accelerate moderately, the needle doesn't drop. It only drops when I punch the pedal to the floor.

1997 Isuzu Rodeo S 4WD

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