O2 sensors - ZR-1 Net Registry Forums

secondchance · 03-19-2016

After having gone through a head gasket failure/rebuild, I am thinking of replacing O2 sensors before taking fuel ratio readings at 1,000 rpm intervals. and having Marc touch up the PROM chip.

Any suggestion/preference for O2 sensors? Is this another component I have to watch for and avoid "made in China"?

A26B · 03-19-2016

Quote:

Originally Posted by secondchance

............ Any suggestion/preference for O2 sensors? Is this another component I have to watch for and avoid "made in China"?

Avoiding Made in China may be harder than expected. You can rule out ACDelco, Standard Motor Products, Denso, Delphi, etc.

Scrrem · 03-19-2016

Let me know what you find. I'm going to change mine as well.
Rich

Hib Halverson · 03-19-2016

Quote:

Originally Posted by secondchance

After having gone through a head gasket failure/rebuild, I am thinking of replacing O2 sensors before taking fuel ratio readings at 1,000 rpm intervals. and having Marc touch up the PROM chip.

Any suggestion/preference for O2 sensors? Is this another component I have to watch for and avoid "made in China"?

For about the last 15 years, I've used Denso O2Ses in my LT5. In fact, I have Denso O2s in most of our cars. I feel they work better and longer than either Bosch or Delpi sensors.

Also, on using O2Ses to take "fuel ratio" readings...keep in mind that you cannot use narrow-band sensor readings to measure how the system is fueling in PE because narrow band sensors are not accurate at any AFR other than stoichiometric. To test power enrichment at WOT, you need a wideband.

secondchance · 03-20-2016

Quote:

Originally Posted by Hib Halverson

Also, on using O2Ses to take "fuel ratio" readings...keep in mind that you cannot use narrow-band sensor readings to measure how the system is fueling in PE because narrow band sensors are not accurate at any AFR other than stoichiometric. To test power enrichment at WOT, you need a wideband.

Understood. I'll discuss WOT enrichment strategy with Marc.

Thanks!

XfireZ51 · 03-20-2016

Unfortunately, we don't have left and right bank tables for WOT tuning so it will optimize one side (the one w the WBO2)and not the other. The PE fuel mods are done in 500rpm increments.

Hib Halverson · 03-20-2016

Log some data then look at the LTFT (block-learn) values for both banks.

Put the wideband in the side which runs the more lean. Do your PE cal. You'll know that the other side is never going to be more lean.

Z51JEFF · 03-21-2016

I replaced mine with Bosch I think. I've got a question that just boggles the mind,why are Chinese products just crap? I would have no problem buying Chinese parts if they weren't crap but jeez,it's nothing but total crap. Now,back on topic,can't remember but one of the 02 plugs is extremely difficult to get to and plug in.

secondchance · 03-23-2016

Received a pair of Bosch sensors. It says "assembled in USA". What does that mean? Still better than "made in China"?

LGAFF · 03-23-2016

it means get that car on the dyno.....

03-19-2016	#1
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,723	O2 sensors After having gone through a head gasket failure/rebuild, I am thinking of replacing O2 sensors before taking fuel ratio readings at 1,000 rpm intervals. and having Marc touch up the PROM chip. Any suggestion/preference for O2 sensors? Is this another component I have to watch for and avoid "made in China"?

03-19-2016	#3
Scrrem Join Date: Feb 2009 Location: Alexandria, Virginia Posts: 1,467	Re: O2 sensors Let me know what you find. I'm going to change mine as well. Rich __________________ 1990 Bright Red Coupe #608 380 Stroker, Ported Heads/Intake/Housings/TB Haibeck Secondary Delete Chip / Pete's Cams George Braml Intake / FIC Injectors Coated SW Headers / Corsa Bill Boudreau B/B ZF6 / Viper 4.10 gears Ron Davis Radiator Pioneer AVIC-Z140BH NAV Fikse FM5's 285 / 335 / C6 Brakes WAZOO Member

03-20-2016	#6
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: O2 sensors Unfortunately, we don't have left and right bank tables for WOT tuning so it will optimize one side (the one w the WBO2)and not the other. The PE fuel mods are done in 500rpm increments. __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

03-20-2016	#7
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 899	Re: O2 sensors Log some data then look at the LTFT (block-learn) values for both banks. Put the wideband in the side which runs the more lean. Do your PE cal. You'll know that the other side is never going to be more lean.

03-21-2016	#8
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,078	Re: O2 sensors I replaced mine with Bosch I think. I've got a question that just boggles the mind,why are Chinese products just crap? I would have no problem buying Chinese parts if they weren't crap but jeez,it's nothing but total crap. Now,back on topic,can't remember but one of the 02 plugs is extremely difficult to get to and plug in.

03-23-2016	#9
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,723	Re: O2 sensors Received a pair of Bosch sensors. It says "assembled in USA". What does that mean? Still better than "made in China"?

03-23-2016	#10
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: O2 sensors it means get that car on the dyno..... __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359