Join the community and post your question. Use our Ask-A-Tech for free now! ASE experts standing by.

Forum > Emissions Component > Question

1988 Pontiac Grand Am - EGR valve test failed. Need advice on as to why.

brand new egr valve holds vacuum and opens properly with engine off but will not when engine is idling this causes egr valve test fail. i would like to know why the diaphram would hold vacuum and open valve with engine off but not with it running
Answer:

Sounds like a possible defective EGR valve vacuum solenoid. We recommend tracing the entire EGR vacuum system. You'll need to inspect the backpressure valve (if equipped) and also the vacuum solenoid for the EGR valve. posted by SmogTips Support

Related questions and answers you might find useful:

How Do I Get a Smog Check Waiver? by Margaret

Do I Need a Smog Check This Year? by Joy

Mini Cooper DMV Registration Due in 5 Day Won't Pass Smog by anne

2001 Jeep Grand Cherokee Laredo with K&N Air Filter by David

1995 BMW M3 Gross Polluter High HC & NO @ 15MPH by Jared

View SmogTips.com in: Desktop / Mobile