1993 Saturn SC2 Trying to pass smog

1993 SATURN SC2
128 MILES • 4 CYL • 2WD • MANUAL
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JUANCBX3
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  • 30 POSTS
my car is high in NOx and already reduced everything else egr was bad and changed it new one didn't work neither after warm wount hold vaccume tech told me to get an egr for an 88 chevy model that the egr is different. Im trying to find out if the EGR are ran with back pressure from the exhast?

Thanx for the advice u can provide
Jan 28, 2009 at 9:02 AM
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DOCFIXIT
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GM does use a backpressure EGR. Was passageways cleaned when EGR was replaced? Is timing advanced?
Jan 28, 2009 at 2:14 PM
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JUANCBX3
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  • 30 POSTS
its electronicly controled and its a new engine
Jan 28, 2009 at 7:03 PM
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