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NG900 & OG9-3 Performance, Mods & Tuning Covers Tuning & Performance modifications for the NG900 (1994 to 1998) & OG9-3 (1999-2002) & '03 Convertible

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Old 26th December 2009
PeteM PeteM is offline
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Exclamation running lean!!?

hey everyone, merry christmas. i have a custome made downpipe thats catless with a stock tune, and i herd that the car is running lean and i would like to know if it is.. how lean is it running and how bad it is for the engine
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  #2  
Old 26th December 2009
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'97 Saab SE Turbo '97 Saab SE Turbo is offline
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If you think that your engine is running lean, you need to install a monitoring sytem like the Innovate LM2 that will monitor A/F ratio. It requires a new bung for the sensor, and it's not cheap, but it will tell you what your A/F ratio is... Ron
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Old 26th December 2009
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With just a dp the car shouldn't be running lean. Do you hear sounds of detonation? Running lean isn't good. I recently replaced an engine after the #4 piston cooked itself. A few weeks ago I installed a wideband air/fuel gauge to monitor the new motor. It's cheap insurance to monitor your motor and not too bad to install. Good luck.
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Old 26th December 2009
PeteM PeteM is offline
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i dont notice any detination, how much are widebands? and where can i get em?
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Old 27th December 2009
John Z Williams John Z Williams is offline
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You can also get on a dyno and they can check the a/f at the same time for about 65 bucks. You can buy a cheap scan tool and have at least some narrow band a/f data, should tell you if its really bad, but the dyno with a/f would be the cheapest best cost effective way to know for sure.

If it is lean, its usually because of a weak fuel pump, there is enough fuel injector to adjust for no cat easily.

good luck,

John
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  #6  
Old 27th December 2009
PeteM PeteM is offline
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i would also like to mention that ive had the downpipe on the car for around 4 months and so far ive had no problems what so ever
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