Cranks But No Start

By radicaltoy
January 11, 2011 in Ask A GM Technician

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radicaltoy

Posted January 11, 2011

I am working on a 2006 GMC sierra with a 4.3L has 50000 miles. I am getting plenty of fuel but no fire at the coil. Tested the IC timing control from PCM to ICM with dmm ac volts had 4 volts. Tested ground to IC module with test light to B+ test light illuminated ground was ok. Tested Ign 1 voltage from fuse box to ICM w/ test light light illuminated. Tested Ign coil control from ICM to Coil with test light to B+ light blinked but was dim. Tested Ign 1 voltage from fuse box to coil had 12.2 volts.Coil has been replaced still no fire. Has new crank sensor Any help would be greatly appretiated

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