Question about 1995 Pontiac Firebird
Does the box have an electrical connector? If it does, it would be a solenoid that is commanded by the computer to turn on and send the vacuum signal on from the intake to the egr valve. It would do so when the engine is at normal operating temperature and is accelerated from off idle to higher rpms. The EGR valve would not open at idle, so there would be no vacuum signal to it during idle. If you open the throttle up a bit (with the engine warm) the vacuum signal should be going to the EGR valve.
Posted on Feb 15, 2014
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Posted on Jan 02, 2017
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