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Trizney · 07-01-2008

Has anyone replaced their vacuum sensor recently? This is the one under the plenum used to control the secondary throttle valves.

The new one I got from the local GM parts store looked correct except for on the connector side, there ws a third nipple for vacuum. I tested this and it was ported to the same vacuum source going to the secondary throttle valves. I just plugged this up.

Maybe these new sensors read differently?

Man I dont' want to pull the plenum again.

07-01-2008	#3
Trizney Join Date: Sep 2005 Location: Austin, TX Posts: 32	Re: Code 56? Has anyone replaced their vacuum sensor recently? This is the one under the plenum used to control the secondary throttle valves. The new one I got from the local GM parts store looked correct except for on the connector side, there ws a third nipple for vacuum. I tested this and it was ported to the same vacuum source going to the secondary throttle valves. I just plugged this up. Maybe these new sensors read differently? Man I dont' want to pull the plenum again.