Author Topic: 1986 GMC P/U with ESC  (Read 49 times)

Offline tayto

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1986 GMC P/U with ESC
« on: June 28, 2020, 09:36:00 PM »
My 1986 GMC 1/2 ton Pickup has electronic spark control, basically just knock detection and it can retard the timing. It has currently been bypassed, but wondering if it is worth repairing. I will be swapping in my 355 over the next month. The internet says to get rid of it, but i don't see any harm in pulling timing if knock is detected. Thoughts?