Re: Rich and Rough Part II - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Rich and Rough Part II
Posted by REM in Seattle (more from REM in Seattle) on Mon, 9 Jan 2006 06:19:28
In Reply to: Re: Rich and Rough Part II, Jeremy R., Sun, 8 Jan 2006 22:06:02
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Water in the gas would make it run rough, but probably not rich. The water would cause the fuel to be harder to ignite so it could explain the mis-fire. Adding some gas dry (pure alcohol)to the fuel would help suspend any water, but I would hesitate to add anything in this situation as you do not want to add more variables to the problem.
Perhaps a failing O2 sensor could fool the ECU and cause the engine to run too rich?
REM in Seattle
2005 Saab 9-3 Aero Convertible; 5-speed; 7000 miles
1998 Saab 900SET; 5-door; Automatic; 81,000 miles
1984 Saab 900T; 3-door; 5-speed; 242,000 miles (RIP)
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