Question about 1993 Oldsmobile Cutlass Ciera
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Posted on Jan 02, 2017
SOURCE: Failed AZ emmisions test
On the side of the dome shape intake manifold closest to the belts, there is either a sensor with a 3 wire plug going to it or just a vacuum hose (it depends on what engine you have in your car as some have the valve visible while others have it hidden). If you have the dome, remove it and you'll see something that looks like a lid. take the lid off and the pcv valve will be behind the lid
Posted on Aug 21, 2009
SOURCE: FAILED EMISSIONS
possible but could be head gasket or valves , or worn rings and is by passing the pistons going straight out the end ...or maby settings are wrong ? try carb cleaner and inspect visually air-filter etc.
Posted on Aug 26, 2009
I have a 94 Tbird with a reading of 790 NO ppm at 1871 RPM, I put about a liter of water into the intake at about 2000 RPM and changed vacum lines to EGR valve,(may have been cracked), now the reading is only 214 NOppm at 1348 RPM. This much change I don't understand. Maybe this info may help someone.
Posted on Sep 17, 2009
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