Cleaning the EGR port
September 9, 2010 10:54 PM Subscribe
How should I clean my EGR port? The check engine code says "inadequate flow through the EGR valve."
posted by noonknight to grab bag (3 answers total) 1 user marked this as a favorite
I have a 1997 Saturn SL-2.
I have tried two ways: 1. Mechanically by running a speedometer cable (attached to my drill, end of the cable intentionally frayed) through the port between the EGR valve and the air intake. I took the throttle body and EGR valve off and ran it through from both ends of the port. This didn't help much.
2. Chemically by putting the throttle body back on and spraying a whole can of Chemtool throttle-body cleaner spray into the suction of the EGR valve attachment flange. The engine was running and the Chemtool made the engine stutter a lot, so it was getting the whole way through the system.
After the above treatment, I reset the check-engine light by disconnecting the battery for a while. The light came on after about three days of driving.
I guess the check-engine light may be indicating some other error code, but probably not.
The EGR valve seems to be working as the valve opens when I apply a 9V current to the outside poles of the valves electrical connectors.