At 07:40 AM 4/24/2000 , you wrote:
>---SNIP---
> First question is: The "universal harness" did not fit the stock
> coil harness or fit the coil receptacle.
>Is there a specified or unique harness I have to use? For now, I cut the
>wires to the coil and added quick connect push connectors. The MSD seems
>to be running fine but I just wanted to make sure I did this right.
>
> Secondly, I have a lot of noise radiated through my stereo
> now. Is there anything I can do to eliminate this?
>-Mike Brown
First off, get rid of those quick connect thingamajigs and use a soldering
iron and some solder. Rough connections on high frequency devices act like
transmitter antennae. Second, buy a filter choke and put it on the feed
lines to the brain box. Third, route the plug wires so they cross only
perpendicular, if possible, to battery voltage wires. Do not run the wires
parallel to a battery positive wire. Some cheap wires when run parallel to
another wire actually induce noise into the other wire. It's called
inductive capacitance (even some high dollar plug wires are cheap in
construction and material). And fourth, put a large capacitor in parallel
with the positive and negative feeds to the MSD box. Something rated for
20 to 30 Volts DC and at least 10,000uF. Should run you about $5 for a
10,000uF Electrolytic Cap and around $12 for a 20,000uF. One last thing,
check your grounds. Grounding is a major issue with EMI
interference. Keep the ground of the MSD isolated from any other ground,
and do not connect it directly to the battery negative. Ground it to a
body support or frame and at least two feet from any other ground
connection. Make sure the negative cable is connected to the engine block
well and the frame.
Others on the list may have suggestions you might try.
Mike
__________________________
mschwall@flash.net
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:50:54 EDT