HFC installed

pokeyl · 11-23-2011, 11:28 PM

Paided $150 plus tax to have them installed (best money I ever spent) took two exhaust techs 1.5 hours to change them. Got a CEL 25 min after install but love the deeper sound and throttle response seems sharper.(

XwChriswX · 11-23-2011, 11:35 PM

Try taking some steel wool and placing it inside the U-bung and then put in the o2 sensor. Disconnect the negative battery terminal or just clear the CEL and then see if it comes back.

If it gets down to what coarsness of steel wool, medium will work fine.

LakeShow · 11-24-2011, 01:00 AM

Which brand? Damn that's my fear of the HFC, that CEL.

djpathfinder · 11-24-2011, 01:05 AM

Do yourself a favor and get an Uprev dyno tune and have that O2 sensor omitted...optimize your system (improve air-fuel ratio as well as free up even more HP and low to mid-range torque) and eliminate the HFC-caused CEL...kill 2 birds with one stone.

pokeyl · 11-24-2011, 10:33 AM

Quote:

Originally Posted by LakeShow

Which brand? Damn that's my fear of the HFC, that CEL.

ERZ cats. sure work good. I got them used 3 or 5K on them. Still looked new, just discolored from the heat. Last user told me I would have a CEL!

It's all good, After I tune no more aft O2 for me.

6MT · 11-24-2011, 10:51 AM

Quote:

Originally Posted by djpathfinder

Do yourself a favor and get an Uprev dyno tune and have that O2 sensor omitted...optimize your system (improve air-fuel ratio as well as free up even more HP and low to mid-range torque) and eliminate the HFC-caused CEL...kill 2 birds with one stone.

The permanant fix to the rear o2 sensor CEL problem with HFC's or test pipes.

efuseakay · 11-25-2011, 08:23 PM

Just an FYI. I have the ERZ HFCs as well. And the L-shaped o2 bung extensions. No CEL in 15,000+ miles.

11-23-2011, 11:28 PM	#1 (permalink)
pokeyl Track Member Join Date: Nov 2010 Location: DFS Posts: 891 Drives: ??? Rep Power: 54	HFC installed Paided $150 plus tax to have them installed (best money I ever spent) took two exhaust techs 1.5 hours to change them. Got a CEL 25 min after install but love the deeper sound and throttle response seems sharper.( __________________ It's not my fault I'm old, I was born a very long time ago!

11-23-2011, 11:35 PM	#2 (permalink)
XwChriswX WFLYIDNNE Join Date: Jul 2009 Location: In The Fastlane Posts: 50,648 Drives: 02 GDB WRX Rep Power: 451	Try taking some steel wool and placing it inside the U-bung and then put in the o2 sensor. Disconnect the negative battery terminal or just clear the CEL and then see if it comes back. If it gets down to what coarsness of steel wool, medium will work fine. __________________ Bonnie - Stage 2, Audio build coming this fall! R.I.P. Abby 3/29/10 - 3/30/14

11-24-2011, 01:00 AM	#3 (permalink)
LakeShow A True Z Fanatic Join Date: Dec 2010 Location: L.I., NY Posts: 5,307 Drives: Everything Rep Power: 25	Which brand? Damn that's my fear of the HFC, that CEL. __________________ \|2013 Audi S4\|Ibis White/Black\|S-Tronic P+\| \|2013 370z\|PearlWhite/Persimmon\|Touring/Sport/Nav\|F.I. CBE 18" CF\| \|Sold\|2011 370z\|Gun Metallic\|Touring/Sport/Nav\|

11-24-2011, 01:05 AM	#4 (permalink)
djpathfinder A True Z Fanatic Join Date: Mar 2010 Location: Edmonton, Canada Posts: 12,910 Drives: 2012 GT-R BE Rep Power: 733	Do yourself a favor and get an Uprev dyno tune and have that O2 sensor omitted...optimize your system (improve air-fuel ratio as well as free up even more HP and low to mid-range torque) and eliminate the HFC-caused CEL...kill 2 birds with one stone. __________________ 2012 GT-R Black Edition Jet Black 2010 370Z 40th Anniversary // SOLD

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11-25-2011, 08:23 PM	#7 (permalink)
efuseakay Enthusiast Member Join Date: Mar 2010 Location: The DAYNGA ZONE! Posts: 404 Drives: 2010 G37xS Sedan Rep Power: 15	Just an FYI. I have the ERZ HFCs as well. And the L-shaped o2 bung extensions. No CEL in 15,000+ miles.