95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Lowe RPM with heavy electrical load

Old Mar 12, 2003 | 07:11 PM
  #1  
Skydigger's Avatar
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From: Victoria, BC
Lower RPM with heavy electrical load

Quick question.

My '86 tends to bog down slightly when I am using a heavy electrical load. I noticed this the other day playing with the power windows. The RPM drops a hun or two. I also noticed it today with all the wipers on.

I know the alternator was replaced recently but the batter the previous owners put in looks very small.

Would a larger battery cure my ills or is it something else?

Thanks,

Warren

Last edited by Skydigger; Mar 12, 2003 at 07:21 PM.
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Old Mar 12, 2003 | 07:21 PM
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From: Shandon, CA
I'd check and clean all contacts at battery, alt., starter,etc.. Then check alt. output and voltage at battery. My guess is a bad ground.
Nathan
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Old Mar 12, 2003 | 07:28 PM
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From: Colorado Springs
100-200 RPM is very low. Sounds like the alternator is having to work too hard to make all that power. The EFI system should be able to keep the revs up though.

Is it an automatic?
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Old Mar 12, 2003 | 08:21 PM
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Thanks for the tips.

100 - 200 RPM is how much it drops from idle. I'd say just from the tach that it drops to about 600 when under load and in gear.

Yes it's an auto but not for long. I'm putting a G52 in it soon.


Warren
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Old Mar 13, 2003 | 04:31 AM
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From: SC
Hey Skydigger,

Mine tends to do the same thing - power windows, sunroof, etc, all make the rpm's drop slightly until I am done using them.
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