Please Help Me Pass Emissions

mrnickleye · 02-01-2006, 01:33 AM

High NOx is caused by the EGR system not working. A bad valve, modulator (or both), or plugged passages (or all of the above).
Mine was the passages. The way its set up, and if they've never been cleaned out, I'd say that it a very likely cause.

See my earlier post. If you are pretty mechanically inclined, you'll see how to clean them out as you remove the valve, and the little cover on top of the intake manifold.

Use a vacuum cleaner and a coat hanger/screwdriver to scrape it out.

02-01-2006, 01:33 AM	#17
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	High NOx is caused by the EGR system not working. A bad valve, modulator (or both), or plugged passages (or all of the above). Mine was the passages. The way its set up, and if they've never been cleaned out, I'd say that it a very likely cause. See my earlier post. If you are pretty mechanically inclined, you'll see how to clean them out as you remove the valve, and the little cover on top of the intake manifold. Use a vacuum cleaner and a coat hanger/screwdriver to scrape it out. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.