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PKRWUD · 06-24-2003, 08:01 AM

Seeing as you live just a few doors down from God, the altitude may be what's causing your code 22.

With the key on, engine off, measure the voltage on the signal wire. At 8000', it should read between 1.33-1.41 vdc. The higher the elevation, the lower the reading should be. Sea level is 1.55-1.63 vdc.

If it passes that test, do this:
Plug the vacuum hose going to the MAP sensor, and attach a vacuum pump to it instead. Start the engine and idle it between 1400-1600 rpms. Slowly apply 15" of vacuum to the sensor. Under these conditions, run a KOER test. Check for a code 22, and disregard any other codes. If 22 comes up again, replace the MAP sensor. If not, then inspect the vacuum hose going to the MAP for damage.

Take care,
~Chris

06-24-2003, 08:01 AM	#9
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Seeing as you live just a few doors down from God, the altitude may be what's causing your code 22. With the key on, engine off, measure the voltage on the signal wire. At 8000', it should read between 1.33-1.41 vdc. The higher the elevation, the lower the reading should be. Sea level is 1.55-1.63 vdc. If it passes that test, do this: Plug the vacuum hose going to the MAP sensor, and attach a vacuum pump to it instead. Start the engine and idle it between 1400-1600 rpms. Slowly apply 15" of vacuum to the sensor. Under these conditions, run a KOER test. Check for a code 22, and disregard any other codes. If 22 comes up again, replace the MAP sensor. If not, then inspect the vacuum hose going to the MAP for damage. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!