Bad Cat Or?

[jays850]

O.k. I've had so many f****ing codes since I put on my down-pipe and then IPD e.c.u. it's pissing me off. Not one code before all this! I was getting front O2 codes so I changed that and they went away, now I keep getting a 443 code (cat efficiency low). So I'm wondering if my new (no name cat) is bad? Here's what cat I have but in 2.1/2 inch.

http://cgi.ebay.com/ebaymotors/3-Catalytic...1QQcmdZViewItem

So is this CAT just a piece of sh*t and can't handle the flow or do I now need the rear O2 sensor. Both stock sensors where working great on stock exhaust. Anyways I can always tell the code has been set because I can't boost over 8-9 psi so reset then everthing is fine for a day or 2.

[RussB]

That sure looks like the cat that K&R installed on their exhaust systems...

I have had 2 dp's, and that cat has failed on BOTH of them. Many 442 CEL's and the catalyst broke loose and rattles around like crazy.

is it a Canammex?

to answer you Q, yes, that cat sucks BigTime. replace it with a Magna-Flow and be happy :)

[jays850]

That sure looks like the cat that K&R installed on their exhaust systems...

I have had 2 down pipe's, and that cat has failed on BOTH of them. Many 442 CEL's and the catalyst broke loose and rattles around like crazy.

is it a Canammex?

to answer you Q, yes, that cat sucks BigTime. replace it with a Magna-Flow and be happy

Thanks, don't know brand but will be getting a magna-flow soon!

[AlvinL]

DTC information 4-4-3

Condition

The ECM continuously monitors the TWC's efficiency by comparing the signal from the rear HO2S with the signal from the front HO2S. When the TWC's efficiency deviates too much, the ECM sets DTC 4–4–3.

Possible source

-Uneven compression.

-Air leakage in the intake system.

-Air leakage in the exhaust system.

-Incorrect fuel pressure.

-Defective TWC.

Fault symptom

Can result in poorer performance.

Code 4-4-3 (TWC Efficiency)

1) Check for other codes. If any code for misfiring is stored (Codes 4-5-1, 4-5-2, 4-5-3, 4-5-4, 4-5-5, 5-4-2, 5-4-3, 5-5-1, 5-5-2,

5-5-3, 5-5-4, 5-5-5, 5-4-4 or 5-4-5) perform that testing first. If Codes 4-3-5 or 4-3-6 are stored, perform testing for that code first. If none of the above codes are stored, go to next step.

2) Perform a compression check on all cylinders. Repair as necessary. If compression is okay, go to next step.

3) Check for air leakage in intake system. Repair as necessary. If there is no air leakage in intake system, check for air

leakage in exhaust system. Repair as necessary. If there is no air leakage in exhaust system, check fuel and residual pressure. Repair as necessary. If fuel and residual pressure are okay, retest using new TWC.

[jays850]

DTC information 4–4–3

Condition

The ECM continuously monitors the TWC's efficiency by comparing the signal from the rear HO2S with the signal from the front HO2S. When the TWC's efficiency deviates too much, the ECM sets DTC 4–4–3.

Possible source

-Uneven compression.

-Air leakage in the intake system.

-Air leakage in the exhaust system.

-Incorrect fuel pressure.

-Defective TWC.

Fault symptom

Can result in poorer performance.

That's interesting. I probably should check fuel pressure stock pump at 144k, as everything else is new