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post #6 of (permalink) Old 01-21-2004, 08:14 PM
Join Date: Apr 2002
Location: Lebanon, PA
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Re: MSD box


My 92 as well as friends 94 and 93 Silverado all had MSD boxes installed. We both had internment miss and occasional rough running engines. The only conclusion we came to was that factory GM TBI distributors are JUNK! My friend installed a MSD TBI pro billet distributor on his 94 and it no longer missed. He then bought one for his 93 truck and it was cured as well. I unfortunately sold my truck before I changed out the distributor. I would look into purchasing and MSD distributor. But until then, I would say your timing is off. You should be able to get away with 5 degrees of advance. You also might want to gap your plugs bigger, and MSD instructions tell you to do that to.

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