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:: orion :: »
https://forums.nicoclub.com/orion-u7549.html
Sun Apr 04, 2004 4:53 pm
EGR is located on the intake manifold...it's function is to add exhaust gas to the intake manifold under certain conditions.
It's controlled by what's called the BPT valve, which operates via vacuum.
Sounds like your EGR valve is stuck open, which allows exhaust gas into the intake even at idle, when it's not supposed to be open.
You can pull it off the intake (3 X 12mm bolts), clean it with carb cleaner, maybe free it up...it's juts a simple diaphram.
Good Luck... - Brian