I have a 1989 Buick LeSabre 3.08, and it will backfire in the intake manifold. It can also be hard to start like it's not getting gas, but once started it runs great. Could this be the EGR valve?

Answer

You might want to check this post:

http://hubpages.com/auto-repair/Engine-Backfires-D...

Updated on April 2, 2018

Original Article:

Symptoms of a Bad EGR Valve
By Dan Ferrell
working