CEL with High Flow Cat?? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Venator · 05-24-2014, 05:18 PM

I have been going to a few exhaust shops to find out costs. All of them have been saying that a HFC will throw a CEL. Have any of you experienced this?

Digitalanalog · 05-24-2014, 05:22 PM

I think it would depend on the cell count of the cat. 100 cell cat wouldn't be as effective as a 400 cell cat.

Venator · 05-24-2014, 05:34 PM

Quote:

Originally Posted by Digitalanalog

I think it would depend on the cell count of the cat. 100 cell cat wouldn't be as effective as a 400 cell cat.

I looked at that but from what I have seen most HFCs online are 200 cell. I would imagine that a 100 cell would throw a CEL.

Apoc · 05-24-2014, 07:55 PM

Quote:

Originally Posted by Venator

I have been going to a few exhaust shops to find out costs. All of them have been saying that a HFC will throw a CEL. Have any of you experienced this?

Considering there are 2 cats if you remove or change the primary cat in the stock header you may throw a CEL. If you replace or remove the secondary cat in the front pipe you shouldn't see any CELs.

Venator · 05-24-2014, 07:59 PM

Anyone out there see any CELs wth a catted header? Like ft86speedfactory?

Digitalanalog · 05-24-2014, 09:27 PM

Quote:

Originally Posted by Apoc

Considering there are 2 cats if you remove or change the primary cat in the stock header you will like throw a CEL. If you replace or remove the secondary cat in the front pipe you shouldn't see any CELs.

You are right, I'm on 4 hours of sleep and not thinking clearly.
Cat or no cat in the front pipe won't give a cel as its not monitored. That car is just a helper to clean up

kodyo · 05-24-2014, 11:48 PM

Quote:

Originally Posted by Venator

Anyone out there see any CELs wth a catted header? Like ft86speedfactory?

I think I saw one reported, but a lot of these cars have secondary mods, so hard to say.

I'm getting that header and have no plans to tune anytime soon.

fender9530 · 05-25-2014, 07:02 PM

I have the ft86 header and no CEL over a couple thousand miles.

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05-24-2014, 05:18 PM	#1
Venator Senior Member Join Date: Feb 2014 Drives: Asphalt FR-S Location: Central PA Posts: 315 Thanks: 159 Thanked 59 Times in 43 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	CEL with High Flow Cat?? I have been going to a few exhaust shops to find out costs. All of them have been saying that a HFC will throw a CEL. Have any of you experienced this? __________________ And Jezza spake unto them and proclaimed that he who shall be last, shall be sideways and smiling.

05-24-2014, 07:59 PM	#5
Venator Senior Member Join Date: Feb 2014 Drives: Asphalt FR-S Location: Central PA Posts: 315 Thanks: 159 Thanked 59 Times in 43 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Anyone out there see any CELs wth a catted header? Like ft86speedfactory? __________________ And Jezza spake unto them and proclaimed that he who shall be last, shall be sideways and smiling.

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05-24-2014, 05:22 PM	#2
Digitalanalog Senior Member Join Date: Mar 2014 Drives: '13 BRZ Limited, '95 BMW M3 Location: Colorado Posts: 104 Thanks: 13 Thanked 67 Times in 25 Posts Mentioned: 0 Post(s) Tagged: 2 Thread(s)	I think it would depend on the cell count of the cat. 100 cell cat wouldn't be as effective as a 400 cell cat.

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