Thread: M103 EGR Valve
View Single Post
Old 09-03-2002, 04:44 PM
sixto's Avatar
sixto sixto is offline
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,124
First test the EGR valve itself. Fit a metal plate between the EGR valve and the exhaust manifold. This will prevent any exhaust gas leakage from upsetting the engine vacuum.

The fact that the EGR valve vacuum actuator won't hold vacuum is not of any consequence at idle since the EGR circuit shouldn't be active at idle. With no vacuum signal the the EGR valve, it should stay closed.

I'd like to understand why some M103s have an EGR valve and some don't. I've never heard of a CA spec vs 49 state spec M103. Is there such a distinction?

91 300SE
87 300SDL
Reply With Quote