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I'm just wondering when i install my dizzy on a ea82t motor do i set the flywheel to 20 btdc on number one piston and then put the dizzy in or set it to 0 tdc put the dizzy in and then set it to 20 btdc using a timing light and turning the dizzy? I set mine to 20btdc and set the timing using a timing light to 20btdc aswell. It is ideling fine and driving good but is backfiring on deceleration and some timies on acceleration too. Not sure if i have done it right?.

I did a write up with pics in tech manuals for 3 plug dizzy. If you have 20dBTDC in 3 plugger, or 4 plugger with your plugs connected and checked the TPS switch then timing should be right. What else did you do to engine?