"Robert Swinney" wrote:

Our 2004 Pontiac Bonneville GXP has developed a low speed miss. It is particularly noticeable when
the engine is cold. It seems to miss only at idling speed and is worse before the engine warms up.
The miss goes away when you load the engine under acceleration. At only 36000 miles it shouldn't
need a major tune-up. I am guessing a dirty fuel injector. Any ideas appreciated.

Bob Swinney


If it was my car, I'd say my number 1 intake runner gasket failed again. Try spraying
some brakekleen near intake / head junction and see if engine tone changes.

Wes