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Hey guys, I’ve been trying to figure out why my car gets a low idle when warm and wants to stall. I got a little closer to the problem, I think. As I was leaving work, I hit some speed bumps causing the electrical connection from the alternator to fell out (This happened twice already). Car is a 1994 Prelude H23A1 btw. The car idled way better without that connection on. It seemed to idle higher than before. The idle was nice and smooth and it didn’t want to stall out like it did before like in this video. http://www.youtube.com/watch?v=N38W_LX_yck Anyways, I wanted to ask if the problem indeed could be related to the charging system or alternator/battery. I jumped my connector under the dash like 1 1/2 months ago and I got a code 20 for Electrical Load Detector even though my CEL didn’t light up on the dash. I reset the ECU and has no codes 1 1/2 months later. I got a multimeter and checked the battery voltage after a quick drive and it read 4.7 volts. I’m hoping It’s an easy fix.
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[quote=”college man” post=75962]You could have a slight problem not enough for the computer
to recognize.[/quote]Exactly, it could be failing enough to affect idle, but not enough to set a code.
Like Eric said check all connections, check for voltage drops on both positive and ground wires.
[quote=”LanEvoX” post=76558]Anything lower then 14.5 volts while engine is running is considered low voltage. As the others have stated, make sure all wires are clean and get your alternator connector fixed. If you still have this issue after all connections have been cleaned and double checked for looseness I would replace the alternator. I had the problem of my alternator just flat out die on me a few months ago. Both battery and brake light came on at the same time.[/quote]
With all due respect, that’s not true. There is no ‘magic number’ for alternator output, just a range.
Keep us posted on your progress after your testing.
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