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exhaust smell without cat convertor

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the wrath

Active Member
Joined
Sep 29, 2002
Messages
1,340
i removed the cat and put on a test pipe and now i have a very strong odor coming from the exhaust it gets in my clothes and it will burn your eyes what can i do to stop it from doing that without putting the cat back on
 
Tune the car to idle a little leaner while still NOT knocking. Use a scantool to check what kind of KR you're getting. Or just learn to live with the smell of performance :P
 
You might want to try unplugging the power from you're ecm and then plugging it back in and taking it for a drive.That way the computer can relearn.
Drive the car as soon as you plug it back in it learns better that way.
 
Or - Put 116 Octane in the tank, and you might learn to like the smell. Nothing like the smell of race fuel in the morning..
 
Have you removed the seal on the cowl at the back of the hood? If you have, put it back.
 
Originally posted by jdodman
Or - Put 116 Octane in the tank, and you might learn to like the smell. Nothing like the smell of race fuel in the morning..

Nothing like it morning,noon or night.
 
Originally posted by jdodman
Or - Put 116 Octane in the tank, and you might learn to like the smell. Nothing like the smell of race fuel in the morning..

This makes it a lot easier to deal with.
 
There's really not much you can do with a closed loop chip as no matter where you set the fuel pressure or what injector you have in there, the computer is always trying to lean to 14.7:1 A/F which is set in the chip and no one changes this because you can't simply change that value w/o changing a lot of other items.

You can reset the ecm but when its learning it will get to the value that it wants to have and your eyes will keep on burning.

With a open loop chip you can play with the maf numbers around idle and change the default open loop A/F as long as you make up for the removed fuel when you go into PE via either PE/RPM or MAF corrections.

Plus its always worse when the car is warming up because its running off the richer open loop value anyway as the car warms up.

Happy motoring..
 
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