Quote Originally Posted by metalchips View Post



I am guessing, but I would run a vacuum line right to the EGR valve. Activating and deactivating it and listening to your noise. Sound like when it comes up to operating temperature it turns the EGR valve on.

I looked at your year 79, that had vacuum EGR.
A LS1 uses that sparky electrical stuff! so my dumb Idea will not work
lol, no big deal..thanks for the help