I got Code 12 - EGR valve clogged problem or something. I took it out and cleaned it. I also cleaned the 4 passage on the intake where this EGR valve feeds the access gas. Drove it for 100 miles. Light came back on. I stopped the car and pull the vacuum hose that connects to EGR valve. No suction. Should it has suction when the car has been running for 35 mile and temp is at normal operating range?

thanks

 

well, I trace the vacuum line to the black box on the fire wall. I found the vacuum lines were pinched at the throttle body. I trimmed the vacuum line and plugs them back on. Will see tomorrow if this fix the problem......