Tricking stock ECU

[mutley531]

I have an '07 Apex Mountain with an Impulse turbo. It has the standalone ECU, but I am using the stock tachometer. Since it is the standalone, the stock ECU is not connected to the coils, so I am getting codes 33, 34, 35, and 36 on the tach. I am wanting to eliminate these codes. I have tried connecting a 1.6 ohm resistor to the stock wiring harness to simulate a coil, but the code still exists. Does anyone have any ideas on what I could try to eliminate these codes?

I have ridden with them for 2 winters. It is not that big of deal, as the tach works with the codes flashing, but it makes the clock obsolete and makes it less likely for me to notice any other code flashing, as there are always codes scrolling. Any help/ideas would be greatly appreciated.

 

[mutley531]

Anyone have any ideas? I am willing to try some different things. I chose the 1.6 ohm resistor since that is within the range of the primary resistance of the stock coils (1.19-1.61 ohms @ 68F).

I imagine others are running a standalone with the stock tach. If anyone has any insight I would greatly appreciate it.

 

[mutley531]

I will try a resistor closer to the center of the range of the specs for the stock coils. I have ordered some 1.35 ohm resistors to try. I will report back what I find. Still, any help would be greatly appreciated.

 

[tjc]

have you talked to Impulse? I would imagine this is not the first time this happened?

 

[hotmail]

I will try a resistor closer to the center of the range of the specs for the stock coils. I have ordered some 1.35 ohm resistors to try. I will report back what I find. Still, any help would be greatly appreciated.

i used 1.3 ohm

 

[mutley531]

i used 1.3 ohm

Hotmail:

Can you tell me how you have the resistor(s) hooked up? Any help would be appreciated.

 

[hotmail]

Hotmail:

Can you tell me how you have the resistor(s) hooked up? Any help would be appreciated.

i will post some photos, the sled is in the neigbour citty. all the stock wiering have been taken off ,but will take it out of the box for you. im going for the autronic sm4 this winter

 

[mutley531]

That sounds great. I'd really appreciate it.

 

[mutley531]

Ok. After further research into this, it seems that the ECU is probably looking for an inductance "kick" (sudden high voltage) from the coil when the coil is triggered. It seems that instead of a simple resistor I may be able to use an inductor to simulate each ignition coil.

Does anyone know what the inductance of the stock Apex coils is? I do not have the tools to measure it.