msd no worky???
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Senior User
Joined: Sep 2003
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msd no worky???
i just installed a msd 6a into my 88 460. it has a holley projection d fuel injection system. it starts up great but die as soon as i let go of the key. i have 12 volts at the coil with the key turned to on so i do not think the problem is at the wiring of the coil. it seems more like no fuel supply when i let go of the key. any ideas? just one more question. i bought the distributor wiring harness to to make the conversion from dura spark to msd cleaner. but when i opened up the package the harness was only 6" long. where did they think i was going to mount the msd box?? on the distributor cap???? maybe i am misunderstanding something here. anyway any help would be appreciated.
Freshman User
Joined: Nov 2003
Posts: 43
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From: michigan
You probably have figured out what I'm going to say, but I was a little confused by your last post. I just put an MSD 6A box on my '94 with (almost) no problems. One of the key things is that the thick red wire go directly to a CONSTANT source of power - not switched. MSD reccommends straight to the battery, although I found the feed to the power distribution box on the LH fenderwell much more convenient. You don't even have to run a fuse, as the MSD box is fused internally (hey - that's what the directions say!) Anyhow, mine didn't work at first, so I reversed the trigger feed going into the box and this got it going like a champ (MSD's directions did not match my truck's wiring colors!)
Yeah - the wires are too short! I extended mine (solder all connections!) and mounted the box on the LH inner fender just behind the washer reservoir. Looks good and runs good so far. . . .
Yeah - the wires are too short! I extended mine (solder all connections!) and mounted the box on the LH inner fender just behind the washer reservoir. Looks good and runs good so far. . . .
FTE *******
Joined: Jan 2004
Posts: 791
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From: Pittsburgh, PA
On the MSD there should be a larger diam red as well as a larger diam black. This is the main power/ground for the MSD box. Make sure it is going to a hot source such as a battery. With this red wire getting heat from the battery and the ground going to a good solid ground your box should be able to go live.
Here is a link to MSD's website page that is a PDF file of the original instructions with detailed info: http://www.msdignition.com/pdf/6series.pdf Copy and paste it into your address bar if it is not displayed here as an active link.
Here is a link to MSD's website page that is a PDF file of the original instructions with detailed info: http://www.msdignition.com/pdf/6series.pdf Copy and paste it into your address bar if it is not displayed here as an active link.
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Senior User
Joined: Sep 2003
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i did figure it out. because i had an aftermarket fuel injection system i need a tack adapter. 4 wire connections later it was all good!
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