Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical> MSD Hiccup with fan switch.
User Name
Password
lost password?   |   register now

Thread: MSD Hiccup with fan switch. Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
11-15-2013 03:53 PM
EOD Guy Been there done that
11-15-2013 02:47 PM
Denny HEY !!! That's good news. I can see where I would shake my head...and probably laugh at the same time...
11-15-2013 02:34 PM
TylerS10 Ok, so I replaced a lot of wires rendering my electrical system NEW. Everything seemed to be in order 14 volts while running no problems. Then the problem came back again and it died at a light like a switch turned the Truck off. It was at that moment a light bulb appeared above me head. ( The kill switch!) Yep my 10 year old kill switch was acting up I could jiggle the switch and the MSD fired up.


I felt like a tard and was happy at the same time to finally track down the problem. Easy fix... in the end =)
11-13-2013 07:14 AM
Denny ((I did get lazy on the water pump its coming off the charge line from the alternator.))

I bet that is the problem. Never draw from the charge line, always from the battery. The battery has the extra punch, so to speak, and as a big capacitor, prevents sudden voltage drops.
11-13-2013 07:04 AM
TylerS10
Quote:
Originally Posted by Denny View Post
((Iím guessing the voltage regulator canít keep up with the start load from the electric motors.))

Sounds more like a voltage drop. The load should be off the battery, thus the battery amperage. Do you have the loads separate, and not drawing from the same line ? Are the chassis grounds, also grounded good to the engine block ? Eng, Frame, Chassis.
The MSD and fans have their own lines off the battery. I did get lazy on the water pump its coming off the charge line from the alternator. ( My be my problem right there )

The grounds are actually a bolt welded to the frame with a nut on top to lock down the ground wires.

Iím going to rerun the alternator charge cable back to the battery and move my water pump to its own line also hopefully that will do the trick.
11-13-2013 06:48 AM
Denny ((Iím guessing the voltage regulator canít keep up with the start load from the electric motors.))

Sounds more like a voltage drop. The load should be off the battery, thus the battery amperage. Do you have the loads separate, and not drawing from the same line ? Are the chassis grounds, also grounded good to the engine block ? Eng, Frame, Chassis.
11-13-2013 06:32 AM
TylerS10
MSD Hiccup with fan switch.

I'm kind of at a loss here with this annoying glitch. I went through the trouble of installing a 140 amp alternator over my 100amp. Added up all the amps in my system and came up with 65 amps total with everything on at the same time. Headlights both fuel pumps and so onÖ
My fans are wired to two 60 amp switches that are manually activated so I can cool the motor off in the staging lanes. My water pump is also wired in the same manner with 12 gauge wires. Grounds are directly to the fame.
MSD is wired independently from an aftermarket fuse box in the cab with 12 gauge wires and a ground going to the frame and battery just to be safe.
Here is my problem I have noticed if I turn the fans off and then on or the water pump while the motor is running I can see the MSD light flash off for a quick millisecond and the motor will hiccup slightly. I have never noticed this till I had to purchase my MSD Digital 6Al since my old MSD 6Al died.
Faulty MDS box?.... Or will a high voltage capacitor for the MDS resolve the issue? Iím guessing the voltage regulator canít keep up with the start load from the electric motors.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -6. The time now is 06:35 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.