Distributor circuit description '92 Ty

[doyle]

I have searched and cannot locate a circuit description of the distributor and would like to understand how the computer (tan wire black stripe ) controls the advance/retard mechanically? magnetically? Also, the significance of the number one position of the rotor. Mine will not start with the circuit open (wire off).

Thank you,
Doyle

 

[sly dvl]

Re: Distributor circuit description '92 Ty

It doesn't control the timing mechanically, rather electronically. That tan wire is the "bypass" line. Under about 400 RPM the ECM will let the Ign Module control the timing. Over 400 RPM the ECM sends a 5 volt signal on the tan wire to tell the Ign Module that "hey, I'm in control now and you will fire the coil when I tell you too, since I know the eng temp, load, RPM, etc..."

Your base timing may be way off and that's why it won't run with the tan wire unplugged...

 

[Logan]

Re: Distributor circuit description '92 Ty

Your timing may be too advanced...when it runs does it sound like there is a lot of valve clatter? If so twist the distributor all the way clockwise to retard it as much as possible and see if it will run. If it will at least idle long enough to get your timing light out you may be in business if not you may need to reset the timing. I had some problems when I put my new engine in and ended up having to pull the distributor and starting over. Make sure you use the timing mark that is further to the right when facing the balancer.

Or you can move the wires around the cap if you have play in them if you don't want to deal with that but honestly it will probably only take a couple of hours and maybe 3 to 4 beers.