purpose of fuel regulation relay attached to airbox?

[5150ct]

any body have any idea what the purpose of this is and if its worth paying almost $200 dollars for? Mine is missing completely and was wondering how much difference this part makes?

[5150ct]

i guess its called the barometric pressure sensor upon further research. Mine is missing. I dont know how important it is, but it costs over $200 from the dealer. is it worth buying or just leave it as is?

[Acet]

I wouldnt pay 200 for it..

[5150ct]

Is it something the car needs to run correctly, or doesent make a difference in operation. I live in Ca. 20min from the ocean so im pretty much at sea level. I was reading that with the sensor missing or in operative the car calculates ratio at sea level anyway. Anyone have any input on this?

[TobyB]

How's your mileage?

I'd go looking in the pull- a- parts...

the M20 etas had one, too- but I don't know if they were the same. Neat inside-
really DOES look like a little mechanical barometer hooked up to a variable
resistor...

t

[Chuck C]

Not worth the $200. Don't worry about it being gone.

[Jaxx_]

My car ran fine on stock management without it. I'm guessing it only makes adjustment from 1atm if you are at higher altitudes... worst case is that you will run 10% richer for each 1000m above sea level.

[jeffnhiscars]

The cover has been off mine for years and at some point the slide arm moved which caused a high idle. Easy fix. Yes, it's an altitude compensator and no, you def don't need it.

If they are worth that much maybe I should sell mine :)