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On Friday I got my Loudmouth cat back put on, and also put on my whisper lid and k&n filter. I've gotta say that I like the loudmouth, I don't think that it's too loud at all, and my girlfriend agrees.

I also got bored and ported and descrened the MAF housing and cleaned the MAF sensor. I'm happy with the mods, seems like I got a bit more HP than before.

The problem is that now at crusing speeds, when I take my foot off the gas, the car tend to backfire a little. This happens from about 30mph and up, whenever I let off the throttle. Also, now there's a whisteling sound when I get on the throttle. Any ideas on any of these new symptoms?

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'98 Formula. Came with 160 degree thermostat and free ram air.
Soon to get Loudmouth catback, whisper lid and K&N filter, smooth air bellows, TB bypass

Whistling is from the lid

The backfire is from the Loud mouth, dont worry when you take the cats off or put a cam in, its going to get louder, and more rediculous.

Porting the MAF just messed with the entire tune of the car, you will get an SES light at some point, the car needs to be tuned to the new flow rates.
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2002 Navy Blue Metallic Trans-Am, 6 Speed, Leather, T-tops. SLP Flow Pack, M/T Street Radials, Free Mods, otherwise stock. Moser 12-bolt and BMR Suspension soon to be installed.

"Miles Per Hour is not a distance that you can race"-Ronald Bastura
http://www.fquick.com/BlackScreaminMachi Hit me up!

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Posted By: SkItZoGrYoHoN On: 05-30-2007 @ 01:51:37     Reply | Top | Edit

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Ok, thanx. I was planning on getting a tune next anyway. Will it hurt anything if it takes me 2 or 3 weeks to get it tuned? (guess I shoulda asked that BEFORE I did it, eh?)
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'98 Formula. Came with 160 degree thermostat and free ram air.
Has Loudmouth catback, whisper lid and K&N filter, smooth air bellows, TB bypass and ported/descreened MAF

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Posted By: SkItZoGrYoHoN On: 05-30-2007 @ 22:55:00     Reply | Top | Edit

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Thanx for the info!
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'98 Formula. Came with 160 degree thermostat and free ram air.
Has Loudmouth catback, whisper lid and K&N filter, smooth air bellows, TB bypass and ported/descreened MAF

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Posted By: Havok_2 On: 06-02-2007 @ 02:58:56     Reply | Top | Edit

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i wouldnt have descreened maf.

i heard its hit/miss with lt1s

but a big no no on ls1s.
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12.1@110 1.56 60 ft. BOLT ONS 3400 stall lifting driver tire

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