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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 07-27-2007, 06:06 AM   #1
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tuning and resetting ecu

It seems when I first reset my ECU the car has a very deep exhaust sound and boosts well. Over time (period of a few weeks to a month) it seems that both the sound and the performance seems to diminish.

Anyone else experience this? Is it just the t7 adapting to normal driving?

I don't have a boost gauge except for the factory one so I don't have any readings to back up my theory. The factory guage goes into the red zone, but never past halfway in the red zone.
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Old 07-27-2007, 06:07 AM   #2
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Yes, this sounds like adaption of some sort. There are sooo many causes for it though, don't really know where to start other than to check your plugs and clean the MAF.
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Old 07-27-2007, 06:22 AM   #3
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Plugs are 5K miles old. Where is the MAF?
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Old 07-27-2007, 06:32 AM   #4
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Mass Air Flow sensor, it will be right next to the air intake. Should be silver and have a connector with wires.

Also called the AMM, Air Mass Meter.
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Old 07-31-2007, 09:33 PM   #5
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Found a picture of a MAF on ebay so I know what I am looking for:

http://cgi.ebay.com/ebaymotors/SAAB-...QQcmdZViewItem

But I do not see it in my car - is it attached to the shield for the open air intake? I am not seeing anything that is open with a screen...
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Old 07-31-2007, 09:54 PM   #6
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Found a picture of a MAF on ebay so I know what I am looking for:

http://cgi.ebay.com/ebaymotors/SAAB-...QQcmdZViewItem

But I do not see it in my car - is it attached to the shield for the open air intake? I am not seeing anything that is open with a screen...
It's usually attached just after the filter and heatshield if you run an open air filter.
http://genuinesaab.com/gallery/93b23...nNick/IMG_8103
Between the heatshield and blue silicone hose in that picture.
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Old 08-01-2007, 06:51 AM   #7
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Got it - thanks.

To clean - just pop it off and make sure there is nothing obstructing the screen?
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Old 08-01-2007, 02:57 PM   #8
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anyone know how to clean a MAF?
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Old 08-01-2007, 03:06 PM   #9
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Carb cleaner, I beleive. I'm pretty sure but I just would hate to say that and have it be wrong on such a potentially expensive part.

I beleive Jameson has doen this multiple times. His IM is Ribz80, I dont think he'd mind if you dropped him a line.
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Old 08-01-2007, 03:08 PM   #10
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They sell AMM cleaner now.
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Old 08-01-2007, 04:37 PM   #11
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Carb cleaner, I beleive. I'm pretty sure but I just would hate to say that and have it be wrong on such a potentially expensive part.

I beleive Jameson has doen this multiple times. His IM is Ribz80, I dont think he'd mind if you dropped him a line.

Thanks, I will IM him.
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Old 08-09-2007, 01:20 PM   #12
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Bump

Anyone know how to clean the MAF?
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Old 08-09-2007, 02:02 PM   #13
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like drew said they sell air mass meter cleaner at auto stores
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Old 08-29-2007, 11:27 AM   #14
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I bought the cleaner - my question is where do I spray? I searched the web and found some instructions with pictures for Ford and Nissan - those seem to come apart (the black section vs. the screen) with small sensors inside. Mine seems to be all one piece - see picture below.

http://cgi.ebay.com/ebaymotors/SAAB-...QQcmdZViewItem

Do I spray in the screen section (seems to be a few sensor looking things) or the black housing?
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Old 08-29-2007, 11:39 AM   #15
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Spray how the air flows through it, so through the mesh section...


Also, if you have a tune, you should invest in a boost gauge. They are nice to have, and provide lots of info.
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Old 08-29-2007, 11:49 AM   #16
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If you're running a stock turbo probably the 1st gauge to add should be a pyrometer for EGT's. I bought a tuned file to run in my car temporarily while I worked things out with T-7, and it would have melted my engine eventually.

These cars run really hot with the small restrictive stock turbos, even with stock software. After the pyrometer, wideband air fuel ratio is next most important for not blowing up your engine, IMO.
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First T7 19T turbo setup. First T7 Deka 80lb. injector setup.
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Old 08-29-2007, 12:07 PM   #17
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Was thinking of the boost gauge - but didn't see the convertible pod on GS - or the guage itself?
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Old 08-29-2007, 12:21 PM   #18
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If you're running a stock turbo probably the 1st gauge to add should be a pyrometer for EGT's. I bought a tuned file to run in my car temporarily while I worked things out with T-7, and it would have melted my engine eventually.

These cars run really hot with the small restrictive stock turbos, even with stock software. After the pyrometer, wideband air fuel ratio is next most important for not blowing up your engine, IMO.
Blowing up my engine??? I was tuned by the master from Sweden...
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Old 08-29-2007, 12:22 PM   #19
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Yeah, well, that won't help you if you have HARDWARE issues.
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Old 08-29-2007, 12:38 PM   #20
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Yeah, well, that won't help you if you have HARDWARE issues.
True, at the time of my tune hardware checked out fine, but I guess I should monitor...

Were did you get your gauge?

Thanks,
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