one more question if i put in a DLIDFIS will my tach still work??? or would i have to put my old autometer one from my old car?? if it will work where would i hook it up? will i need a tach adapter thinggy from MSD?? and yes i used the search

 

you tach will still work since you are not changing the trailing ignition and tach works off trailing

 

schwanks fer da ansaw

 

Dont the early models run off the leading? I beleive I learned that lesson on Jermey's 79 when we converted it to electronic

 

So you pull the tach wire off of the leading clip and put in on the trailing clip...

 

mar3, did you wake up on the wrong side of the bed again?

 

Well I guess the point is mte if your converting it to direct fire

 

That and don't the MSD boxes have a spot on them labeled "tach"??

 

well for DLIDFIS you have to convert the ignition to the later models anyways

 

I've been forced to the Saturday shift again here at SBC.........................dill weed.................

 

mike-p quoter

 

It doesn't make any difference! I have DLIDFIS and I run my tach off the leading.

 

I've tried my tach on Leading and Trailing but keep it on Trailing so I'll know if my Trailing ignitor or coil ever dies.

 

If the trailing goes, it's just gonna run a little rough. Wouldn't it be more disastrous if the leading ignitor went and you didn't catch it in time? Or not?

 

'79 and '80 have the tach off of the leading coil because the trailing coil is shut off some of the time, in order to keep the thermal reactor fed with unburned HC's.

'81-later don't use thermal reactors, so Mazda switched the tach signal to the trailing coil.

 

The anti-rice superstar has done it again, ladies and gentleman!! Switch it back, Jeff20B or suffer the consequences...

 

Hey now, I'm also an anti-rice

Anyway, if one of the Leading ignitors ever died, it would feel like it's running on one rotor. Thus no need to hook the tach to the Leading side. Also, if a Leading ignitor dies and you happened to have kept your old coil to cap wire, you could run L and T through your cap just like stock and never be stranded. My article explains all this and more. Click my www button.