When the truck is idling the timing is at 12deg when you accel as little as 100rpm the timing goes to max and stays there approx 40Deg you can accel /decel and timing stays pegged to 40deg until the rpm drops to 800 then timing goes to [...] is no breakout box...

FIX posted 1/20/2001

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle