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Cat and resonator delete



The check engine light will come on and you might lose fuel mileage if the computer keeps thinking the cat isnt working good enough, and of course it gone so it might.
 
Ok with a clogged cat it will get bad gas mileage also?,it's getting roughly 20 now,I thought without a cat the car will breathe better and improve,how loud will it be without it on?
 
If the cat is clogged that can also cause bad gas milage. W/o cat is a very minimal noise increase. If you remove the resonator you will get lots of nasty rasp and it will sound bad. Remove the cat, leave the resonator.
 




bummer. I usually just throw them up on CL or the local facebook buy/sell and some random guys will pick them up for anywheres from 50-150 for cats.
 
You can just pick up a universal Magnaflow converter on EBay for $50-75 bones.

Or, get a bolt-in downpipe from Milzy if they're still in business...they make 3100/3400 stuff.

If you went that route, not only would you keep the MPG's...but they'd probably improve along with getting better performance out of it as well.
 
The only problem is that if you delete the cat without deleting that second sensor on your computer, you could throw a code because it's an o2 sensor that sits right after.. It may also effect your fuel mixture.
 


How do I delete the sensor,I thought I only seen 1 which was at the firewall,don't they make something to plug in it to make the computer think it's there
 
Thought those 02 sims didn't work on 01+ because the car would be stuck in cat diagnostic mode and burn a crap load of a gas and whack out your fuel trims.

Sent from BFE
 
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