Hello, I am having problems with sputtering on my 1999 Grand Marquis. This past Monday I had the intake manifold crack almost 3/4 of the way around, and I and my uncle in law replaced it with a good one with the metal housing for the thermostat from a junkyard and completed that on Thursday. Friday it ran well on a hot day and I assumed things were okay, but then yesterday it began to sputter after startup and while idling, and it does it more when the transmission is changing gears while accelerating on the main roads. The check engine light also turned off on Friday (the day it was running fine) and after driving it about 10 miles or so yesterday, (after it started sputtering) it came back on again. Any ideas on what may be causing this?
have the same problem?
Sunday, July 21st, 2013 AT 6:23 AM