On Wed, 25 Feb 2009 20:06:07 -0600, "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
==========
Try the cheap fix first.

Add two cans of Berryman's B-12 FI cleaner to about 20 gallons of
gas and run that through the system.
http://www.berrymanproducts.com/Default.aspx?tabid=140

If this solves the problem you may want to start buying your gas
at another station.


Unka' George [George McDuffee]
-------------------------------------------
He that will not apply new remedies,
must expect new evils:
for Time is the greatest innovator: and
if Time, of course, alter things to the worse,
and wisdom and counsel shall not alter them to the better,
what shall be the end?

Francis Bacon (1561-1626), English philosopher, essayist, statesman.
Essays, "Of Innovations" (1597-1625).