Can ECU take no cats?

[robfenn]

Hi,

We have a Taitec on order and will also be taking off the cats. I am wondering if this means the ECU will need to be fettled or will it overfuel to the point of danger?

Thanks

-Rob

 

[rk-nsx]

what year car?

Hi,

We have a Taitec on order and will also be taking off the cats. I am wondering if this means the ECU will need to be fettled or will it overfuel to the point of danger?

Thanks

-Rob

 

[robfenn]

It's a 2001 model...

 

[rk-nsx]

you will most likely get a CEL without cats.

 

[docjohn]

yes.

 

[NetViper]

I had no cats on a 95, no problem at all. Just LOUD AS HELL. Cats are back in now.

 

[docjohn]

95&96 throw intermitent soft cels,but from what I've heard 3.2l ecus are less tolerant.

 

[Larry Bastanza]

You will most likely get 0420 and 0430 cat effeciency CEL's. The ECU measures the effeciency of the cat reacting to mixture changes. The 95-96 models were more tolerant then the 1997+ cars.

HTH,
LarryB

 

[robfenn]

Is this dangerous then, should i be getting a different ECU?

Cheers,

-Rob

 

[docjohn]

well if you don't mind driving around with the cel on,annoying.Plus you won't know if a new problem tripping a cel occures after.Switching the ecu to what?Although things may be different in Europe,in the US it is a pita to switch back to obd-1 and or a stand alone aem system,kinda too much work simply to eliminate the cats.Search the FI forum for folks who went there.

 

[NSX+EVO]

I would suggest using 4 18mm spark plug anti-foulers. Drill out two of them with a 1/2 drill bit. Then screw the drill out one into the one that is not. Install this into the pipe along with the O2 sensor and this should cure your CEL.

 

[robfenn]

Thanks