Rotospeed

iTrader: (8)

its a 85 gs stock 12a, with a s4 turbo, locked dizzy and a holley 600.

i had the dlidfis on the car befor but removed it when installing the turbo set up, so with the stock ign. i time it at 10-0 and it runs good but when i hook up the msd box the timming is way off and i need to turn the dizzy 1 tooth to set it at 10. thats ok but then the closest i can get the timing split is about 25 deg. and that is the problem.

the msd set up is a sci box using the purple and green wires with a sheilded cable to a gutted igniter. its got 2 stock coils for the direct fire.

so what can i do to fix this timming? or if its not going to work with this box ill just go back to the dlidfs set up..... but i would like to have the msd working.

thanks for eney help.


and ill get some pics up in a bit.

j9fd3s

iTrader: (3)

if the timing changes with and without the MSD, something is backwards.

bad 83

iTrader: (3)

Are you using the MSD to trigger the leading and the trailing, or what? I am running a MSD 6A on the leading with a second gen leading coil. No issues.

Rotospeed

iTrader: (8)

as in......pick up wires or what?? im not sure what to check.

trailing is stock. leading is gutted igniter to msd box to 2 fb coils to plugs.

if the purple and green wires are switched would that do it??

84stock

iTrader: (5)

I run the mazdaspeed wiring diagram for my msd, timing didn't change at all. You have something drastically wrong. Did you boost prep your holley and run a rrfpr.

Rotospeed

iTrader: (8)

yes its boost preped and ive got a rrfpr for a carb.

ill start going over the wireing again.

has no one els had this problem

84stock

iTrader: (5)

Read one of your old posts where you changed the exhaust. Nice looking setup.

j9fd3s

iTrader: (3)

purple and green would do it, um if the wires were crossed in the gutted ignitor that would do it.

Rotospeed

iTrader: (8)

crossed wires in the igniter it was. fixed it and the timming is good, once i finnish up a couple of other things in the next few days i can finish tunning it.

THANK YOU GUYS !!!