What is this Switch on my ECU?

[GoTRicEo0]

What is this thing? All I know is that the ECU came with a switch and the that it was tuned by Field with an active rom.Some machanics say its a boost controler or different tuning settings.Any ideas?

[ca18det_boy]

I'd guess maybe a high and low boost setting.

[1990flatblack240]

plug it in your car and flip the switch, easy as that.

[GoTRicEo0]

Everything is installed in my car right now. I can't feel or tell the differences on both settings.

When I flip the switch, all I see is the red LED on and off.

[karmakaze]

Everything is installed in my car right now. I can't feel or tell the differences on both settings.

When I flip the switch, all I see is the red LED on and off.

pull off the cover and give us a detailed picture on what it is hooked up too.

[namwons_240]

im guessing its a switch between the main board for stock ecu maps to the daughter board for the boost up maps...thats if theres a daughter board in there.

[GoTRicEo0]

Well.. here's the internals

Edit~Btw.. do you guys think you could tell me what those IC are for?
Modified by GoTRicEo0 at 3:47 PM 3/25/2006

[GoTRicEo0]

any other opinions?

[teddy]

Could be a switch to control switching between a race map and street map. I've seen some rom's that allow you to program two maps onto them and switch back and forth.

[biglipzit]

It is most likely a difference between fuel maps... one for race gas and one for street gas or something of the sort. My ECU came like that tuned by KS rom with a switch also. One of the rom's gave me more agressive fuel maps and no limits... I say flip it and check out your rev limits. More than likely one might go past the stock ecu rev limit... I am sure both have had the speed limitors removed like mine did.