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0311htp Frugal06 Z

To remove the upper plenum, you'll need to disconnect a few vacuum lines as well as the sensor plugged into the bottom of the plenum. Reinstalling the plenum can be made easier by loosening the bottom bolts of one side of the runners.
1989 Pontiac Firebird Formula TPI Head Work - Rocking and Rolling

 To remove the upper plenum, you'll need to disconnect a few vacuum lines as well as the sensor plugged into the bottom of the plenum. Reinstalling the plenum can be made easier by loosening the bottom bolts of one side of the runners.  View Related Article

 

 

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