View Full Version : 1990 DeVille idles rough

03-27-13, 10:14 AM
Title says it all.

When firing her up for the first time of the day, ususally she idles rough and struggles to accelerate. Lasts for about 30 minutes then runs smooth.

Anyone have this issue? or know good ways to diagnose it?

03-27-13, 11:17 AM
Sounds a lot like a vacuum leak.