hey again-well, as I have been working on the timing the tan wire to ECM has been hooked up. was wondering if it should be. you're saying to unhook it to time it or leave it hooked up? really wish I could get an answer on my dist. mod. did it like tom Quinn did his, took all advance off[weights and springs and advance pod], marked breaker plate and outer ring with a scribe line, but failed to mark line all the way to dist. housing, and welded breaker plate and outer ring moved when I was adjusting gap on star wheel to pick-up coil. and I didn't have a reference line to move it back to, so think I kind of lost my" home base" position, or 0 degrees spot. used the place where tom locked his down as a reference point. just don't know how critical that is. think ive got it close. just freaks me out. never had this problem. got to be something simple. been trying to find answers today, ill hit it again tomorrow. maybe that thing will bust right off before the day is out. Ha- sure hope so. thanks for your help.5/16 direct return to the tank is perfect.
The timing however...
The timing is stored in the PROM and is controlled by the ECM and the ignition module. Disconnecting the bypass wire tells the computer that the timing is at 0 degrees. When you reconnect the wire the ECM should advance the timing by whatever value is stored in the PROM. You may be 12-14 degrees off.
Do you know which wire is the jumper?