egr

hi everyone i failed smog in my 88 b2200 nox way too high i fixed timing, cleaned EGR (alot of carbon build-up), new cat, o2 sensor, and full tune up. it seems the EGR is not working. its not getting any vaccume to it i see the vaccume line going to a set of silonoids? what triggers them to send vaccume to EGR... ANY HELP WOULD ROCK thanx!

Did you test to see if the EGR will hold a vacuum? Use a hand held vacuum tester and a piece of tubing. It won't matter where it's hooked up or controlled if it won't hold a vacuum.

also, make sure you got all the carbon and that you get a good seal when the vacuum is applied.

ya its clean and holds vacuum their is no vacuume coming from the duty solenoid valve............ im going to check over the vacuum routing any ideas about testing items that controls the EGR????????