Low Voltage & Idle Issue
08-18-2010, 01:20 PM
#1
Honda-Tech Member
Thread Starter
Join Date: Feb 2003
Location: ORLANDO, FL, USA
Posts: 169
Likes: 0
Received 0 Likes
on
0 Posts
Low Voltage & Idle Issue
What's up guys I've noticed with the key on the ON position, my voltmeter shows 12.4-12.5. Once I turn on the car the volts clock in at 13.9-14.0 and within about 20-30 minutes of driving they go down steadily to around 13.2-13.4. This is with no additional load aside from my boost gauge, PLX wideband, an Apexi AFC and the voltmeter itself driving around during the day.
At night though with the headlights on and the car idling the volts come in at 12.5-12.8 or 13.0 at best and if I switch the oem foglights on it goes down to anywhere between 12.0-12.2 sometimes lower. With either or on (headlights & foglights), or both, the idle is very rough and sometimes the car shuts off when coming to a stop.
I'm running a 130amp Alternator with a 4 gauge wire going straight to the battery. I was running an Odyssey PC680 battery but have since switched back to a conventional Autostart Gold battery from Advance Auto to see if it was the battery but with no luck, same issue. I've also upgraded the big "3" to 4 gauge wires as well.
I was told that this may be an issue that could be solved by upping the idle but turning the idle screw on the throttle body hasn't helped either. It idles around 800-840 right now so I was thinking about maybe bringing it up some thru Crome to see if that changes anything but any other ideas out there? Anyone have an idea on what voltage I should be seeing with the headlights on & off?
Just in case its a 92 civic with a boosted LS running 1000cc injectors again using Crome, no AC, no PS and running a Fluidamper crank pulley. Any help would be greatly appreciated.
At night though with the headlights on and the car idling the volts come in at 12.5-12.8 or 13.0 at best and if I switch the oem foglights on it goes down to anywhere between 12.0-12.2 sometimes lower. With either or on (headlights & foglights), or both, the idle is very rough and sometimes the car shuts off when coming to a stop.
I'm running a 130amp Alternator with a 4 gauge wire going straight to the battery. I was running an Odyssey PC680 battery but have since switched back to a conventional Autostart Gold battery from Advance Auto to see if it was the battery but with no luck, same issue. I've also upgraded the big "3" to 4 gauge wires as well.
I was told that this may be an issue that could be solved by upping the idle but turning the idle screw on the throttle body hasn't helped either. It idles around 800-840 right now so I was thinking about maybe bringing it up some thru Crome to see if that changes anything but any other ideas out there? Anyone have an idea on what voltage I should be seeing with the headlights on & off?
Just in case its a 92 civic with a boosted LS running 1000cc injectors again using Crome, no AC, no PS and running a Fluidamper crank pulley. Any help would be greatly appreciated.
08-18-2010, 02:30 PM
#4
Honda-Tech Member
Thread Starter
Join Date: Feb 2003
Location: ORLANDO, FL, USA
Posts: 169
Likes: 0
Received 0 Likes
on
0 Posts
Re: Low Voltage & Idle Issue
The alternator is brand new about 2 weeks old but when I took it to get tested this weekend I was told it checked out fine. Maybe I should take it out and get a second opinion at Autozone or something?
08-18-2010, 02:57 PM
#5
Honda-Tech Member
Join Date: Aug 2010
Location: Cloud Nine, Utah
Posts: 136
Likes: 0
Received 0 Likes
on
0 Posts
Re: Low Voltage & Idle Issue
Yeah i would get a second opinion, unless you you or a buddy has one of these,
http://www.toolfetch.com/Category/Au...rs/ASO6042.htm
Love this thing.
http://www.toolfetch.com/Category/Au...rs/ASO6042.htm
Love this thing.
Thread
Thread Starter
Forum
Replies
Last Post
