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Old 08-09-2009, 08:55 PM   #1
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Car: 1988 Flame Red Trans am GTA
Engine: Forged 355 4 Bolt, FIRST TPI
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oxygen sensor placent

hey everyone i got a simple question... i have a heated o2 sensor thats located at the end of the y pipe... i have long tube headers custom y pipe and flowmaster 80 series catback... it takes like 2 minutes for it to go into closed loop.... if i move my heated sensor to the driver side collector would it go into closed loop faster or heat up faster... im thinking that maybe i have the sensor too far back... like i said it works it just taking a little too long... i have it hooked to the fuel pump so its only on when the car is running.... thanks in advance...
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Old 08-09-2009, 09:28 PM   #2
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Re: oxygen sensor placent

Possibly, but O2 sensor heat is only one of the variables that the ECM looks at before deciding to go into closed loop. I had a 3rg gen with shorties and a heated O2 mounted close to the collector and it wouldn't go closed loop much faster than yours does, when started from overnight-cold.
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Old 08-09-2009, 09:41 PM   #3
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Join Date: Mar 2007
Location: Raleigh, NC
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Car: 1988 Flame Red Trans am GTA
Engine: Forged 355 4 Bolt, FIRST TPI
Transmission: built 700r4/vette stall
Axle/Gears: ls1 torsen 3.42 gear

Classifieds Rating: (8)
Re: oxygen sensor placent

well its not a big deal really i was just wondering why it takes like 3 mins or so......
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Forged 355 4 bolt, FIRST injection TPI, L98 headed, Hotcammed engine

Full Suspension, Lowered, probuilt/Stalled 700r4,LS1 3.42 torsen braced/girdled rear end

want: koni yellows, moser 9 inch, afr 180 heads, Danas road race 700r4 and vigilante 2800 stall
http://www.thirdgen.org/techboard/vb...=view&id=62362
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Old 08-10-2009, 02:41 AM   #4
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Re: oxygen sensor placent

Possibly waiting for engine coolant temp to get warm enough before going closed loop.
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Old 08-10-2009, 09:48 AM   #5
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Join Date: Mar 2007
Location: Raleigh, NC
Posts: 1,532
Car: 1988 Flame Red Trans am GTA
Engine: Forged 355 4 Bolt, FIRST TPI
Transmission: built 700r4/vette stall
Axle/Gears: ls1 torsen 3.42 gear

Classifieds Rating: (8)
Re: oxygen sensor placent

oh yeah i never thought of that..... yea after it is warmed up and i shut it off i does go into closed loop within a minute or so....
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Forged 355 4 bolt, FIRST injection TPI, L98 headed, Hotcammed engine

Full Suspension, Lowered, probuilt/Stalled 700r4,LS1 3.42 torsen braced/girdled rear end

want: koni yellows, moser 9 inch, afr 180 heads, Danas road race 700r4 and vigilante 2800 stall
http://www.thirdgen.org/techboard/vb...=view&id=62362
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Old 08-10-2009, 09:48 AM
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