O2 Sensor Question

stykthyn

I want to measure mine. It doesn't look that tall.

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#1

• Aug 30, 2013

• #1

I have two different O2 sensors in my car. One is a black sleeve over the wires and has three wires, the other is a white sleeve and has four wires. I was under the impression that EECIV wiring was set up for a 3 wire sensor. My buddy put in the 4 wire when we got ready for the first fire up after the rebuild. Since then I've had a miss and my passenger bank( the one with the odd sensor) reeks of fuel. Could the four wire sensor be the culprit?

 

madspeed

Colonel Mustard

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#2

• Aug 30, 2013

• #2

what year, the 87?

 

stykthyn

I want to measure mine. It doesn't look that tall.

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#3

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• #3

yes. its an 87

 

madspeed

Colonel Mustard

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#4

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madspeed

Colonel Mustard

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#5

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• #5

looks like you have 1 wrong sensor, as per the diagram they are both 3 wires

 

stykthyn

I want to measure mine. It doesn't look that tall.

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#6

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• #6

sho nuff. 3 wires it is. that will likely nix my rich condition, hopefully the stumble is a by product of that as well.

 

madspeed

Colonel Mustard

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#7

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most likely

 

mikestang63

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#8

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• #8

To the best of my knowledge you need the 3 wire. I replaced on of mine about a year ago. The 4 wire O2 are grounded through the harness, while the 3 wire O2 sensors ground through the body.

Wiring is as follows
gray wire is the ground
black is signal
white wires are heater

If you tried to use the 4 wire on a three wire car, you don't have a ground. The connector will actually plug in, but the mating connector on the car harness will not provide a ground and you can fry your EEC.

Are you getting a CEL?

 

stykthyn

I want to measure mine. It doesn't look that tall.

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#9

• Aug 30, 2013

• #9

not for the O2s which is why I never questioned it.

 

madspeed

Colonel Mustard

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#10

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• #10

Pull codes yet? Looks like you found the problem, but i'd run your codes for sure. At least run them after you swap in the correct sensor and clear them

 

stykthyn

I want to measure mine. It doesn't look that tall.

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#11

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• #11

yes, all my codes were for my smog pump and charcoal canister which have been removed. Had one for the TPS but that has been fixed. I plan on replacing both sensors, will pull codes and report back after that.

 

mikestang63

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#12

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Pretty sure the part #
Bosch 13942

 

Grabbin' Asphalt

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#13

• Aug 30, 2013

• #13

at @-zone the direct fit(shorter wire harness) was more $$$ than the universal o2(longer wire). I used a tie strap no issues and save a little $$

 

stykthyn

I want to measure mine. It doesn't look that tall.

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#14

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I saw a 3 dollar difference between the universal and the direct fit. one was 36 and the other 39.

 

Grabbin' Asphalt

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#15

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• #15

stykthyn said:

I saw a 3 dollar difference between the universal and the direct fit. one was 36 and the other 39.

Click to expand...

Now you know, .......and knowing is 1/2 the battle, ...G.I Joe!!!

That's $6 towards gas, nice combo meal after the install or ice cream plus at Sonic!!!!

 

Reactions: stykthyn

stykthyn

I want to measure mine. It doesn't look that tall.

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#16

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I'm all about a double whopper. add bacon.

 

Grabbin' Asphalt

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#17

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stykthyn said:

I'm all about a double whopper. add bacon.

Click to expand...

D@mn I'm gettin' hungry now!!!

 

jrichker

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#18

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• #18

stykthyn said:

I have two different O2 sensors in my car. One is a black sleeve over the wires and has three wires, the other is a white sleeve and has four wires. I was under the impression that EECIV wiring was set up for a 3 wire sensor. My buddy put in the 4 wire when we got ready for the first fire up after the rebuild. Since then I've had a miss and my passenger bank( the one with the odd sensor) reeks of fuel. Could the four wire sensor be the culprit?

Click to expand...

The 4 wire sensors are for the 4 cylinder cars. The extra wire is a ground, and I don't know if it is the sensor ground or the heater ground. You need 2 good O2 sensors with the 3 wire setup that the 5.0 Fox Mustangs use.