no spark 1989 F-250 , 460 cu inch.

Asked by Sep 14, 2017 at 12:22 PM about the 1989 Ford F-250 STD Standard Cab 4WD LB

Question type: Maintenance & Repair

used troubleshootmyvehicle,com to check power ,grounds etc.  The coil is not getting a pulse from ignition module to ground. Replaced the ignition module, the pip . Found that if I unhook the computer it will spark. tried new ecm but it acts exactly the same.

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