Quote:
Originally Posted by Tripler
What is the EGR and how do I test it.
Mike
Sent from my SM-A205W using Tapatalk
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EGR... Exhaust Gas Recirculation. An emissions device used on vehicles from the 90s through (to a small degree) today. It puts exhaust gasses back into the intake to help minimize NoX emissions. The valve should be closed at idle and gradually opens as rpms and load come up. If it stays open at idle and low rpm rough running is the result. You will need an FSM (Factory Service Manual) to test it properly. If your doing any type of work on these cars an FSM is a must have. Internet input, as you have seen from this thread, will send you in a million different directions. Follow the test procedures in the FSM. As a stop gap measure find the EGR valve and the tube that goes to your intake manifold. It goes in right behind the IAC valve on the passenger side of the plenum. Disconnect the tube from the plenum. Find a way to plug the tube (an accordingly sized rubber stopper will do the trick) Then reconnect the tube to the plenum. Please make sure that whatever you plug it with can?t be sucked into the plenum! If that solves your problem your EGR is the issue. Usually they stick open when they go bad. But please... get an FSM and read up on the various LT5 systems. There is also a commonly available training manual that does an excellent job of explaining the various systems. I believe LGAFF sells them on CD.
H
