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Do you really need a MSD box?


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wow really good in detail answers, way to go phil........im gonna dive back into my car real soon, gotta get that beast running again

 

"Do you really need a MSD box?" is a question geared toward yes/no answers.

If you want more detailed answers, ask more detailed questions.

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You have a perfectly good ignition transistor running your MSD box, just take the box out and run the SAME WIRE that used to go to it (points input) to the negative coil terminal. +12V switched to the positive side of the coil and then go into your Tuner Studio ignition settings and find the dwell setting. Change it from FIXED DUTY to dwell control, try 3.0 mS dwell time. DONE! Even pTurtle can knock that out in a day.
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ok went out in the shop tonight, and brought the laptop,

 

hooked the laptop up the my mpi comp, and turned the key and bam the computer linked up, did the setting change that scott said and went to crank and there was no rpm signal

 

I have 12 volts at the coil with the key on

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well, then mSD was not the prob. Check spark angle wire from dist to ecu. Maybe a bad pickup.

msd was the problem, msd would not power up while cranking the car phil..........when I uninstalled the msd box, i removed the coil wire from the coil and I found water underneath the coil wire, I think that is what caused the msd to go out

 

ill check everything tonight or a little later from now

 

ill prolly just order another msd box in a week or 2

Edited by PDodson
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Ok I'll give a small update, I checked all my wiring and added a ground

that I needed to add and I now have a rpm signal

 

I now need to figure out why I have no spark

 

Here is what I will look at,

Coil

Distri cap

Rotor

And I will check my plugs( need to check them anyway)

 

Anything else I need to check????

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