Double D racing Posted March 10, 2014 Report Share Posted March 10, 2014 A friend of mine gave me a MSD box to use. its been kept in good condition.Is there any way to test it before I put it in the car ? Putting a new motor in, don't really want any kind of mis-fire.... Link to comment Share on other sites More sharing options...
jwmbishop Posted March 10, 2014 Report Share Posted March 10, 2014 Wire it up to distributor mounted in a vice and spin the distributor? In car test - The way to test the MSD Unit, you will disconnect the white wire from the yellow on the timing control.Disconnect the coil wire at the distributor cap and lay 1/4 from ground, this is where it will spark.Turn the ignition key to the "ON" position, do not crank, make sure there is 12 volts at the small red wire of MSD.Take the white wire of the MSD 6 Unit and touch and release from ground, every time you touch and release from ground it will spark at the coil wire.If you do not get a spark, swap the coil with a different coil, it doesn't have to be new, as long as it is a good working coil.Do the same test, if you get a spark then it was a bad coil, if you still do not get a spark then you know it is a bad MSD unit, but double check that all connections are good and tight. Edite to add - this is only for spark/no spark test. To make sure it works correctly all through the RPM with the CD and scatter controlled - only MSD can test it from what I've heard... Link to comment Share on other sites More sharing options...
Double D racing Posted March 12, 2014 Author Report Share Posted March 12, 2014 I wonder if they do things like that...you send it to them, they test it for a fee.... Link to comment Share on other sites More sharing options...
sm44 Posted March 12, 2014 Report Share Posted March 12, 2014 I have sent them distributors and they go through them and ship them back. They look brand new and cost about $100.00. I'm pretty sure they will test a box just not sure if it is free or not. Link to comment Share on other sites More sharing options...
jwmbishop Posted March 12, 2014 Report Share Posted March 12, 2014 Call em - 915-855-7123, toll free 888-673-7859. Joe or JD are the easiest techs to understand when the talk goes real technical. Their support department is awesome - but busy so emails take a couple days... Link to comment Share on other sites More sharing options...
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