Hey guys,

The write up on using the AEM EMS N2O tables for protection in event of an alcohol pump mechanical failure are great.... but I learned today after unplugging my Alcohol pump yesterday to send it in for repairs that the SMC kit shows a "spray" light when the pump is un-pluged.

That means that for a mechanical pump failure the AEM will protect you..... but for an electrical failure the AEM is no protection at all.

Keith

 

I belive this will only happen if the sensor wires become ungrounded, chances are slim for this to happen but yes anything is possible. There are several other things that can happen as well with as many moving and electrical parts that you have.

 

I am still going to have my SMC hooked into the EMS, partial protection is better than none. I just wish my SMC head unit was located where I could see the LED's. If the spray LED stayed on, and you could see it you would know there was an electrical problem.

The 03's use the intercooler spray light to indicate that the alcohol is spraying using the EMS output for the spray light.... I wonder if there is a light (other than check engine that I am using as a shift light) that people with out the intercooler spray system could use.

Any ideas?

Keith

 

Keith GTVEVO has the SMC and i have the AMS kit on my car. Mine has seperate LED's etc.. I have them mounted on my pillar and I have it hooked up to the EMS and the IC sprayer light turns on when the pump is spraying. It works perfect man. I think you can use the check engine light.



Tommy chime in brother on Keiths Question.

 

Yes , you can output the NOS activation to any switch on the EMS including the normal ground switches so you could wire up your own LED to indicate it is spraying. When the spray is on the EMS will ground the LED and it would then indicate things are spraying.

When the light is on I remember measuring the voltage at around 4 volts, I will test to see what the voltage goes too when it becomes ungrounded because if it happens to be different you could also test the use of the Switch #7 On Below along with the on above to capture certian voltages in the activation point. I will test this once I get a chance to see if the voltage does change. If it works you could use both.


CRAP Correction: You would need to use an open output pin instead of a switch. So you could actually power the LED instead of grouding it. Since you don't have the IC Spray light you should still be able to use that pin inless it is in use for somthing else.

 

I went out and measured the voltage and they are basically the same without ground as it is when the light kick on for spray, I should of realized this becuase that is exactly what the pump does to turn on the light is break the ground connection once the pressure sensor reaches its desired setting.

If you wanted to use a different approach you could impliment an actual flow sensor and change the AEM setting to obey those rules. Either way would work but the fault rate should be pretty null with this consern. A light would help give you an indication at least.