I've got a problem with my mechanical advance.
It's a DSII, and i've welded the advance slot down to limit to 10*.
This all worked great a few days ago. At that time, I had the whole setup running with the pink resistor wire. Because of this, I had to set the idle above 1000 RPM or the voltage to the module would drop below 9v and it would not work (and the car would die). I went in and removed it to get a full 12v+ at the module/coil. At that point, I was able to lower the idle to about 500 rpm (screw on my YF all the way out).
At anyrate, that seemed great, but the advance stopped working properly. In fact, I was getting about 10* of retard w/ rpm. It was suggested on here to reverse the polarity of the reluctor to the module. I did some double-checking and discovered that I did have it backwards, so I reversed it. That stopped it from retarding w/ rpm - but it still doesnt work right.
Now, i've got it so that it is set at 10* initial. When I rev it up, I get about 4* of mech advance. Then - if I keep revving it up - it falls back to 10* (initial) - the mech advance goes away.
I don't know precisely what RPM because I can't see the tach and check the timing at the same time, but it jumps up right off idle and falls back around 3k rpm or so.
So, the base question is - why is my mech advance not working ? I have taken the distributor apart a few times and everything seems fine. I also locked out the vac advance, so that isnt a factor.
It's a DSII, and i've welded the advance slot down to limit to 10*.
This all worked great a few days ago. At that time, I had the whole setup running with the pink resistor wire. Because of this, I had to set the idle above 1000 RPM or the voltage to the module would drop below 9v and it would not work (and the car would die). I went in and removed it to get a full 12v+ at the module/coil. At that point, I was able to lower the idle to about 500 rpm (screw on my YF all the way out).
At anyrate, that seemed great, but the advance stopped working properly. In fact, I was getting about 10* of retard w/ rpm. It was suggested on here to reverse the polarity of the reluctor to the module. I did some double-checking and discovered that I did have it backwards, so I reversed it. That stopped it from retarding w/ rpm - but it still doesnt work right.
Now, i've got it so that it is set at 10* initial. When I rev it up, I get about 4* of mech advance. Then - if I keep revving it up - it falls back to 10* (initial) - the mech advance goes away.
I don't know precisely what RPM because I can't see the tach and check the timing at the same time, but it jumps up right off idle and falls back around 3k rpm or so.
So, the base question is - why is my mech advance not working ? I have taken the distributor apart a few times and everything seems fine. I also locked out the vac advance, so that isnt a factor.