Question about 2001 Saturn S-Series
I recently took my 2001 Saturn SL to have it's required yearly emissions check performed prior to renewing my registration and for the first time since purchase it failed. I was told by the emission station that the No. 1 cylinder was showing a misfire. The car starts and runs fine with just a hint of vibration. However, when idling there is a sputtering sound from the exhaust. The same sound goes away when the car is above idle. The idle RPM is a constant 750 and never wavers. I have changed the plugs and wires with no change in the sputtering. I changed the wires less than a year ago and originally had two wires crossed, this was quickly corrected. Could this be the reason for the fault code and if so what can I do to have it reset, Any ideas? Also I still get great gas mileage.
Solved my problem: After more internet searching and consulting with my mechanic we determined it was the intake manifold gasket folding over into the #1 cylinder. This is common on Saturn engines. The gasket folds over leaving a leak in the vacuum system which causes the car to run lean. Check for a leak by spraying carburator cleaner around the #1 cylinder intake and you will hear the idle change if there is a leak. I had gasket replaced for $450 and car runs like new. My car is a 2000 saturn SL 1 with 60000 miles on it. Hope this helps someone.
Posted on Mar 18, 2009
Testimonial: "Thanks it really worked."
The intake gasket is know to "fold" on #1. Spray the #1 intake runner, where it meets the head, with some brake clean. With the engine running. If the idle changes, it is leaking. Replace the gasket.
Posted on Jan 24, 2009
I had this same problem and did as Bowmanew2002 and
rejakwilson suggested. It took me about 6 or 7 hours cause I really didnt have the tools to do the job but the part only cost me about $30 (after I spent about $300 figuring out the issue and replacing other parts). Anyways thanks guys
Posted on Dec 06, 2009
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