Lean on both banks is often a vacuum leak in the common intake area. Inspect all vacuum lines that connect to theintake manifold, also closely inspect the intake boot from the MAF to the engine. Any vacuum leaks in these areas will cause the engine to run lean. You can also try carefully spraying the intake area with carb cleaner while the engine is idling, if the engine changes when you spray an area, you have found a leak.
Tuesday, May 25th, 2010 AT 8:20 AM