Hi,

I have a 89 Chevy Suburban, does anyone know what the correct Map Sensor Resistance values should be?? How I can find that out?? I called a dealer in town and they couldn't tell me. I am getting a check engine light code for it.

Thanks,

swb1

Although it is a resistance device, it uses a Wheatstone bridge to sense absolute pressure and vary the output. It is best tested with normal voltage applied and monitoring the output voltage at varying absolute pressures. Simply leave teh electrical connector on it and backprobe the terminals. Compare the output voltage at a known vacuum or MAP to the table:

http://72.19.213.157/files/MAPTable.gif