neon output mods

Karl · Post by **Karl** » Sat Apr 01, 2006 3:49 pm

I have a ver 3 board with Mn&s 24s13.

I completed the DSM input mods and neon output mods as per the Diyautotune.com website. When I run it on the stim or put in the car and crank it over. I get both outer leds flashes just like they should; however, I only get spark on one coil pack. I have checked the coil pack and it is fine. The one that is not sparking is the built in vb921 not the extra one I installed. Also this is the one that has it's output on pin 36.

I have the pin 2 of the vb921 igbtout jumpered to Iac2b does this correspond with pin 36?

pin 2 of the secondary vb921 jumpered to ign does this correspiond to pin 31?

What is a different way to route this through the db37. I am thinking I just have a juimper wrong or I am trying to use the wrong pin.

thanks

Karl

Monotalonawd · Post by **Monotalonawd** » Sat Apr 01, 2006 9:33 pm

I think you have Igbtout and Ign mixed up!

If you jumper Ign to Igbtout, spark signal for the first vb921 will be on pin 36.

For pin 2 of the second vb921, you put it on any free pin; if it's on Iac2b, the 2nd spark signal will be on pin 31.

Karl · Post by **Karl** » Sun Apr 02, 2006 2:29 pm

Hey, I tried it your way and no luck. I still have only one set firing. I compared your setup to my original, and they are the same except the pin 2 on the vb921 are opposite. Should work the same just send them out on opposite pins. Anyway, both ways don't work. The leds are flashing and I notice one the vb921s is hotter than the other. Do these things go bad very often. I need to test the second v921 to see if its bad. I have been running it on the stim and comparing voltage flucuations with the first vb921 and they don't quite match.

Any ideas guys.

Karl