View Poll Results: Will Gutting The Cats Cause The Check Engine Light To Iluminate ?

IT WILL

43.48%

IT WON'T

17.39%

IT COULD

21.74%

I KNOW THE ANSWER BUT WON'T TELL YOU

17.39%

Voters: 23. You may not vote on this poll

Trick Question !!!

Reply Subscribe

Thread Tools

Jan 13, 2006 | 09:50 PM

#21 (permalink)

chxf

Forum Regular

Joined: Apr 2005

Posts: 533

Likes: 0

From: Zurich, Switzerland

Re: Trick Question !!!

Quote:

Originally Posted by HDDP

I'm surprised you haven't heard of our famous quartet! We make the sweetest music with beer cans LOL...

Oh yeah! Of course, the fab four! *lol*

Quote:

Originally Posted by HDDP

Once I re-installed the exhaust system (with gutted cats) and replaced the 02 sensors, the CEL did not illuminate as expected... It has been a common myth that if you remove the contents of a catalytic converter on a car that is equipped with ODB2 or ODB3, the CEL will illuminate. This is not the case on my '04 Crossfire...

I remember one of my former cars had a broken O2 sensor. The CEL did not illuminate neither, but I felt a noticeable loss of power and a horrible smell from the exhaust. Then I was told that the broken sensor did not send infos to the chip which calculated a wrong air/fuel mixture.

Quote:

Originally Posted by HDDP

The increased odor is a testament to the effectiveness of the catalytic converter and how well it scrubs the hydrocarbons from the exhaust.

Yes, looks like. But I hope you don't ruin the engine. Good and safe drive!

Greets

Jan 13, 2006 | 09:57 PM

#22 (permalink)

Aero Blue

Forum Regular

Joined: May 2005

Posts: 949

Likes: 0

From: Macomb Township MI, USA

Re: Trick Question !!!

Quote:

Originally Posted by HDDP

I dyno'd the car about a year ago at Buttonwillow Raceway... They have a spec. miata shop there with a dyno... I'm going back to the track on Feb. 4th & 5th and going to TRY to get another run while I'm there. It's just the matter of whether I want to spend another $160 and cut into my track time...

The guys from Extrude Hone want a before and after dyno but are waiting for me to do it myself... NO LOVE !!! LOL

So, what kind of numbers did you pull? Also, I see your going back there on Feb 4th, well, that's my birthday so give em' heck!

Jan 14, 2006 | 02:14 PM

#23 (permalink)

HDDP

Thread Starter

Senior Member

Joined: May 2004

Posts: 4,094

Likes: 8

From: Charleston, SC

Re: Trick Question !!!

Quote:

Originally Posted by Aero Blue

So, what kind of numbers did you pull? Also, I see your going back there on Feb 4th, well, that's my birthday so give em' heck!

Original dyno done with 3,500 miles on the car over a year ago with zero modifications was 203 hp at the wheel. This will be the first dyno run done after the minor mods I've done to the car. I'm hoping to do it on Feb. 4th or 5th while I'm at the track.

Then will send the heads and intakes to extrude hone for work... Then repeat the process when they are reinstalled. That way both Extrude Hone and I will have hard #'s to determine the effectiveness of the process.