msd problem

D

dirteater33

New Member
Anyone evey had this prob? Have and msd unit, and all of the sudden the timing is off. It runs fine, as long as you set it by ear, but the timing is of by about ten degrees, and when you advance the timing with the distributer it actually retards it and the other way around. Have already checked balancer, cam, advance in distributor to see if was loose. And already called msd for ideas, and they basically told me it wasn't possible it was on there end.
 
What type of distributor are you running? Its possible it could be a distributor issue if its a gm distributor. If its a good distributor........id check to make sure your MSD is good and grounded. Also check to be sure its getting full 12 plus voltage. You running an alternator..or a 16 volt battery?? Those MSD's need alot of juice to keep them going. Ive seen bad batteries cause the MSD to do odd things......even burn coils up.
 
Distributer is an hei type, checked ground, even ran an auxilary, just in case. Battery is an optima yellow top, still good, don't run an alternator, never have. Same system we have ran for years,had this problem once before, distributor, module, cap, coil and it was fine, don't want to do that again, not to cheap!
 
I would bet on the distributor. Check to see if it has play in the shaft as this will cause the MSD to go haywire. Im guessing you have the module out of it???
 
Distributor wire

Make sure the wire from the box to the distributor(pick up wire) is not plugged in wrong. The green wire does not go to the black and green, and the purple wire does not go to the black and purple wire they are the exact opposite. I don't know why MSD does it that way but I've seen this problem from that cause before.
 
dirteater33

Check to make sure the Purple & Green trigger wires are not reversed from the MSD box all the way up to the trigger sensor in the dist. Since you say timing by ear seems to work, let me throw this out on the table. We have seen a timng light pickup being sensistive to its alignment on the #1 Cylinder. If it is clipped one way you get a true timing reading if you hook it the other direction it will throw the timing reading off. I have seen this issue at least 7 times this year alone, gotta love the quality control of the manufacturers. I hope this you some help!

ep33510

techwest@techwestracing.com
 
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