Q about off-road H &X pipes and O2 sensors

Chipdog · 04-10-2002, 10:26 PM

I have heard that once you get rid of the cats your O2 sensors do not work properly anymore. I take this for the truth because mine are all messed up. What do you guys do? I have heard about welding a small piece of metal behind them to bring the back pressure up but that didn't seem to work for me. Let me know what I should do or is it another one of those things to ignore while scaning for codes?
thanks
Chip

Conman · 04-11-2002, 12:27 PM

my car runs fine with the off road H and I don't ever remember pulling codes for the O2 sensors
As long as it runs fine I think the codes can be ignored, just my opinion

gtsr515 · 04-11-2002, 12:37 PM

Removing your Cats will not screw up your 02's, only age does that, removing the cats will make the car run richer.

Chipdog · 04-11-2002, 10:12 PM

I am getting a
91 Heated Exhaust Gas Oxygen sensor circuit indicates system lean (left HEGO
41 Heated Exhaust Gas Oxygen sensor circuit indicates system lean (right HEGO

Plus the good old 34 EVP voltage above closed limit (SONIC)

Both sensors have been replaced. Could they both be bad? Where do I go from here?

Chip

04-10-2002, 10:26 PM	#1
Chipdog Registered Member Join Date: Apr 1999 Location: Miami,Fl USA Posts: 297	Q about off-road H &X pipes and O2 sensors I have heard that once you get rid of the cats your O2 sensors do not work properly anymore. I take this for the truth because mine are all messed up. What do you guys do? I have heard about welding a small piece of metal behind them to bring the back pressure up but that didn't seem to work for me. Let me know what I should do or is it another one of those things to ignore while scaning for codes? thanks Chip __________________ 92 GT Convertible Hooker Headers, Headman X pipe, Flow Masters, 4.10s, BBK 1.5 drop, 73mm Mass air, 65 FMS TB, FMS Aluminum radiator, T-5 swap with a Steeda shifter. And a 9 pound Blow Job Last edited by Chipdog; 04-11-2002 at 07:06 AM..

04-11-2002, 12:27 PM	#2
Conman Registered Member Join Date: Apr 2002 Location: Kingston, Ontario Posts: 351	my car runs fine with the off road H and I don't ever remember pulling codes for the O2 sensors As long as it runs fine I think the codes can be ignored, just my opinion __________________ '88 lx, Black on Black, check it out here Spent all my money on school, what a dumb mistake I'm old enough to know better, but still too young to care.

04-11-2002, 12:37 PM	#3
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	Removing your Cats will not screw up your 02's, only age does that, removing the cats will make the car run richer. __________________ Remember...2nd place is 1st place for losers!

04-11-2002, 10:12 PM	#4
Chipdog Registered Member Join Date: Apr 1999 Location: Miami,Fl USA Posts: 297	I am getting a 91 Heated Exhaust Gas Oxygen sensor circuit indicates system lean (left HEGO 41 Heated Exhaust Gas Oxygen sensor circuit indicates system lean (right HEGO Plus the good old 34 EVP voltage above closed limit (SONIC) Both sensors have been replaced. Could they both be bad? Where do I go from here? Chip __________________ 92 GT Convertible Hooker Headers, Headman X pipe, Flow Masters, 4.10s, BBK 1.5 drop, 73mm Mass air, 65 FMS TB, FMS Aluminum radiator, T-5 swap with a Steeda shifter. And a 9 pound Blow Job

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