Need help ASAP...LS2/3/L92 question

[Shawn MacAnanny]

The way DOD works is it has two solenoids which allow oil pressure to go into 4 cylinders lifters which 'deactivate' these lifters and keep them from opening and closing the valves. This keeps them from needing fuel and also from pumping air into your exhaust giving your 02 sensors false readings.



You can just leave it unplugged as the default mode is OFF without the singnal from the ECU the solenoids remain closed. If you want to removed the heads you can just swap the lifters with LS1 lifters and all will function that way no matter what.

If your engine has DOD you will need the 6012 box as im almost positive its cam sensor is on the front of the timing covers which means its a 4x cam sensor and has a 58x reluctor wheel. I am using the 6010 box on my 68 firbeird ls1 and i couldnt be happier. No need for a distributor.

I'm assuming you are running a 6012 box here's what to check. Hook up the laptop to the MSD box and see what voltage you are getting at the box. The box wont fire with less than about 12.3 volts or so.

See if the box displays RPM through the laptop. You need about 200rpm to get the box to fire the plugs. This is very critical. Stick a jumper box on it and try.

Are your running one of the timing pills in it? It wont start without one unless you have uploaded you custom tune. Also it wont run you custom tune if you have a timing pill in the box.