cheapest place to get acdelco o2's
Registered User
Joined: Jul 1999
Posts: 1,041
From: Robinson, IL
Originally posted by lt1camaroman93
I had the same problem with the car droping out of closed loop at stoplights with groty long tubes and true dual 3". And for my car open loop is a big big no no. when i drop out of closed loop the car dies it runs so rich, thanks to the wonderfuly large cam with next to no vacuum at idle. But when in closed loop it will idle fine and everything, so i am trying to get it to stay in closed loop as much as possible, and for me that mean heated o2's. Also how can i get ahold of jason cromer?
I had the same problem with the car droping out of closed loop at stoplights with groty long tubes and true dual 3". And for my car open loop is a big big no no. when i drop out of closed loop the car dies it runs so rich, thanks to the wonderfuly large cam with next to no vacuum at idle. But when in closed loop it will idle fine and everything, so i am trying to get it to stay in closed loop as much as possible, and for me that mean heated o2's. Also how can i get ahold of jason cromer?
GM 3-wire O2 sensor 25312185GM $37
GM 3-wire sensor adapter harness "connector" 12117025 $13
Prices are from Dal.
The weather pack harness enables one to use a GM 3-wire sensor without cutting and spicing into the sensor wiring. It is not required but I like it for easy future sensor replacement. This harness has three long leads to help with the connections. I used Posi-Lock fittings to connect everything along with an in link fuse for protection. Be certain to use power on when key is switched to ign.
Registered User
Joined: Jul 1999
Posts: 1,041
From: Robinson, IL
Registered User
Joined: Oct 2000
Posts: 2,915
From: Sacramento
Originally posted by Fatdog
Stock O2's(single wire) for stock manifolds (exhaust),3 or 4 wire for headers.Previous posts have suggested that the headers don't get hot enough to send signals to the computer for the rich lean thing.My02
Stock O2's(single wire) for stock manifolds (exhaust),3 or 4 wire for headers.Previous posts have suggested that the headers don't get hot enough to send signals to the computer for the rich lean thing.My02
Registered User
Joined: Feb 2007
Posts: 169
From: Glendale, AZ
FYI - 4 wire O2 sensors provide a ground for both the sensor and heater seperately.
1 wire - signal, grounds through the manifolds.
3 wire - signal, heater positive, and a ground for the heater.
4 wire - signal, signal ground, heater, heater ground.
Advantage of the 4 wire being that if the threaded bung in the header/manifold gets rusty/corroded, you still have a good ground for the signal.
1 wire - signal, grounds through the manifolds.
3 wire - signal, heater positive, and a ground for the heater.
4 wire - signal, signal ground, heater, heater ground.
Advantage of the 4 wire being that if the threaded bung in the header/manifold gets rusty/corroded, you still have a good ground for the signal.
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