LS1 Timing Control Module for Edelbrock - forumsey Aug 24, 2011I purchased a Module/intake package July 2010 last year to use with my engine on a T-Bucket build. My first start-up of this engine was April 2011. My problem is #1 and ((#4) Edit) Cylinders do not fire. They appear to put out a spark. I checked compression in all 8 cylinders and have 150 in both of the non-firing cyls. and around 180-185 in the firing cyls.[PDF] MSD LS1 Timing Control Module - 91238, 7118 - Trouble MSD LS1 Timing Control Module - 91238, 7118 - Trouble Shooting This box is designed to be used exclusively on Gen. III small block Chevy engines only (LS1, LS6, LQ4, LQ9, LM4, LM7, Etc). All Gen. III engines feature a 24X crankshaft reluctor wheel and a 2x (50%) camshaft sensor.
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