+5v source for MAP sensor

[E30godz]

I'm trying to find a 5 volt power source that i can tap to power the 2 bar map sensor im using to monitor boost. i wasnt aware that i needed a 5 volt source and wired it up to a 12 volt source from the car.


Is there a wire that i can use?

did i fry the MAP sensor?

[E30-323ti]

Is the AFM supply 5v??

You may need one of those voltage reducing diode things from an electronics store, pretty cheap.

[aaron_silva]

Doesnt a resistor lower the voltage?

Aaron

[mspiegle]

a resistor should lower the voltage, but you would probably want a regulator of some sort i think.

And yes, doesn't the AFM get a 5v reference voltage? use that

[E30godz]

yes i can get a voltage regulator, that wouldnt be too bad.

Does anyone know the color/where the wire is located that sends power to the AFM?



and did i fry my MAP?

[mspiegle]

you may have gotten lucky with your MAP. I did stupid shit on my MAF and didn't fry it. Depends on the protection circuitry.

Why don't you probe the lines w/ a voltmeter to find a constant 5v?