I installed dc jdm headers and carsound cat. My check engine light came on its saying bad cat. has anyone else thrown this code, if so how did you fix it and does it effect performance.

 

did you reset the ECU?

i never had a problem with my Toda or Spoon header and Carsound cat...

 

Did you connect the 02 sensors?

 

yeah i reset the ecu twice the light comes on about a week after resetting the ecu

 

is the cat new?

 

If it comes on after that much time, you very well may have a bad cat. Been down that road myself.

 

how do i know if you have a bad cat. what happened to you.

 

[QUOTE=rockwilda]did you reset the ECU?

QUOTE]

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastitr01 &raquo;</TD></TR><TR><TD CLASS="quote">how do i know if you have a bad cat. what happened to you.</TD></TR></TABLE>

Well, if the bricks are falling out you will hear them rattling around. That's what happened to me.

 

Theres no rattling noise from the cat. Does the check engine leight effect peerformance when its on?

 

As far as I know, it will only affect performance if the cel triggers "limp mode" and your rev limiter becomes 6k. Good luck, I'm thinking of doing the same headers myself.

 

check the 02...if its plugged in dude. i missed that today workign on a customers car.

 

is there anything else i should check for? Does anyone elses exhaust smell after installing carsound cat?

 

yes sounds like a o2 or cat problem... theres nothing else electical that has sensors besides those two componets

 

Brand new cat and brand new O2 here, and I still have a code 67. It could just be that the O2 sensor isn't getting hot enough for some reason

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by py1188 &raquo;</TD></TR><TR><TD CLASS="quote">Brand new cat and brand new O2 here, and I still have a code 67. It could just be that the O2 sensor isn't getting hot enough for some reason</TD></TR></TABLE>

hmm code 67... weird cuz if it was the heater i thnik it would be code 1 or something right?

 

To check the secondary O2 sensor first. Ideally the secondary O2 should be putting out less than 0.45V (lean) and should be holding fairly constant with the car warmed up. If it's on the rich side (more than 0.45V) then it'll definitely trigger the code 67.

Quick check on the cat is you should see a temperature rise between the inlet and outlet. A 100deg celcius rise in temp. indicates it is indeed oxdizing the exhaust. If you have access to a pyrometer or ideally an infared pyrometer it's a fairly easy check.

Code 67 is 2 trip logic, low catalyst efficiency must happen in 2 different key cycles to trip the CEL. The 1 week delay indicates that possibly the cat is weak. Do the temperature check.

What model Carsound did you get?