Question about 1987 Oldsmobile Cutlass Supreme

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Where is oxygen sensor located?

Where is oxygen sensot located, I know it's somewhere on the manifold. Car is running rich.

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LOOK ON THE EXHAUST MANIFOLD CROSS OVER PIPE.

Posted on Jul 05, 2010

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I have the 305tpi and its running rich.the guy that owned it before i did eliminated the o2's...i'm just starting to put money ikt and i want to fix this running rich problem i have...what wou


well replace oxygen sensors that would cause engine to run rich if you remove or disconnect them oxygen sensor control fuel system it will cause engine run rich open loop mode on cold engine start ups as engine warms up it will go closed loop cause leaner fuel mixture.if you replace oxygen sensors could help rich fuel problem if not you could have intake manifold leak or faulty fuel pressure regulator.

Jan 24, 2012 | 1987 Chevrolet Camaro

1 Answer

1994 ford f150 oxygen sensor location


An Oxygen Sensor (O 2 S) or heated Oxygen Sensor (HO 2 S) is used on all engines. The sensor is mounted in the right side exhaust manifold on some V8 engines, while other V8 engines use a sensor in both right and left manifolds.

Heated oxygen sensors are located in the exhaust pipes below the exhaust manifolds. The sensors react with the oxygen in the exhaust gasses and generates a voltage based on this reaction. A low voltage indicates too much oxygen or a lean condition. Where as a high voltage indicates not enough oxygen or a rich condition.

Disconnect the Oxygen Sensor (O 2 S). Measure resistance between PWR and GND (heater) terminals of the sensor. If the reading is about 6 ohms at 68°F (20°C). the sensor's heater element is okay.

Hope this helps (remember to rating this free answer).

Oct 13, 2011 | 1994 Ford F150 Styleside Supercab

1 Answer

Car started running a little rough,and burning the fuel at about three times the normal rate. So i changed plugs and wires the car is running even worse real bad and if you give it gas it dies immediatly....


Do not do any mote to the plugs etc. Your Problem and it's solution lie elsewhere. The clue for me was your bad fuel consumption and running rough. Your engine is running too rich all the time which means the ECU is unable to balance the fuel air ratio. You do not state what year or model your car is so my answer is a bit generic but should help point you in the right direction. Also have any diagnostic codes read out at the dealer or Autozone. 1) Coolant temperature sensor - if this is faulty the ECU will assume that the engine is permanently cold (as in start up mode) and set long injection cycles. The engine will permanently run rich under these conditions. Check out the coolant sensor wiring, it's connections and the sensor itself. 2) MAF mass air flow sensor - on most cars this sits on collar immediately after the air cleaner/filter on the air ducting. If this dirty or faulty the ECU may assume that more air is entering the vehicle than there actually is and tries to compensate by injecting more fuel. 3) IAT inlet air temperature sensor - located with the MAF. If this faulty the ECU may cause the engine to run rich. 4) Oxygen sensor(s) - these are located on the exhaust manifold. When an engine reaches normal running temperatures it enters 'closed cycle' operation in which the ECU sets the fuel air mix by the signals it receives about the exhaust composition from the oxygen sensors. If the sensors say there is too much oxygen in the exhaust, due to a fault the ECU assumes that the engine is ruining lean and compensates by injecting more fuel. Note that when an engine is warming up the engine is said to be in 'open cycle' and the coolant sensor signal has priorty over that of that of the oxygen sensor.

Apr 04, 2011 | Chevrolet Beretta Cars & Trucks

2 Answers

What is a code 51


Is refer at O2 sensor, Code 51 - Oxygen sensor output indicates lean too long

Power loss light: Off
Limp-in mode: Engine allowed to run rich, but prevented from running lean

Possible Causes
Bad oxygen sensor - Replace the sensor which is located on the turbo housing near the down pipe (for turbo) or on the down pipe near the exhaust manifold.

Bad connection or wiring - Check the wiring and connections between the sensor and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts. Look for melted wire insulation near the exhaust manifold. A shorted connection to ground or any positive source will cause this fault code.

Low fuel rail pressure - See the Diagnosing Your Fuel System page.

Diagnostic Method - Trigger Parameters
- In closed-loop
- Sensor output indicates lean for more than 715 seconds (11 minutes, 55 seconds)

Results If Component Fails
A fault code 51 is stored, the circuit stays in closed-loop, and the logic module will still monitor the oxygen sensor signal. If the condition persists for four times what it took to set the code, the logic module will allow the engine to run rich, but prevent it from running lean.

Hope helps.

Mar 28, 2011 | 1996 Dodge Intrepid

1 Answer

Engine light came on took it to auto shop. they said it was a code 51


Fault Code 51 - Oxygen sensor output indicates lean too long

Power loss light: Off
Limp-in mode: Engine allowed to run rich, but prevented from running lean

Possible Causes
Bad oxygen sensor - Replace the sensor which is located on the turbo housing near the down pipe (for turbo) or on the down pipe near the exhaust manifold.

Bad connection or wiring - Check the wiring and connections between the sensor and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts. Look for melted wire insulation near the exhaust manifold. A shorted connection to ground or any positive source will cause this fault code.

Low fuel rail pressure - See the Diagnosing Your Fuel System page.

Diagnostic Method - Trigger Parameters
- In closed-loop
- Sensor output indicates lean for more than 715 seconds (11 minutes, 55 seconds)

Results If Component Fails
A fault code 51 is stored, the circuit stays in closed-loop, and the logic module will still monitor the oxygen sensor signal. If the condition persists for four times what it took to set the code, the logic module will allow the engine to run rich, but prevent it from running lean.

Hope helps.

Mar 28, 2011 | 1996 Dodge Intrepid

1 Answer

WHERE WOULD I PLACE AN OXYGEN SENSOR THAT PLACE UPSTREAM


Welcome to FIxYa.com


The upstream oxygen sensor is typically found on the exhaust manifold that is bolted to the engine block. It may be as far up on the exhaust as the the manifold piping located in the front of the engine under the hood. The sensor looks like a plug sticking out of the exhaust piping and will be the only plug inserted into the exhaust system.

Important:

Removal of the oxygen sensor is easier when the engine temperature is above 48CC

(120T).

' Handle the oxygen sensors carefully in order to prevent damage to the component.

Keep the electrical connector and the louvered end free of contaminants. Do not use

cleaning solvents on the sensor. Do not drop or mishandle the sensor.

REMOVAL

Numbers in ten in parenthesis correspond to numbered components in image.

1. Raise and support the vehicle.

2. Disconnect the sensor harness connector.

3. Remove the oxygen sensor.

Bank 1 Sensor 2(1)

Bank 1 Sensor 1(2)

A Bank2Sensorl(3)

A Bank2Sensor2(4)

INSTALLATION

Important: A special anti-seize compound is used on the oxygen sensot threads. The new

service sensors should have the compound already applied to the threads. Coat the

threads of a reused sensor with anti-seize compound P.N 5613695 or the equivalent.

1. Install the oxygen sensor.

Bank 1 Sensor 2(1)

A Bank sensor (2)

A Bank2Sensorl (3)

A Bank2Sensor2 (4)

Important: Make sure that all of the harness retaining clips are intact. The harness

must not contact any of the hot exhaust components. The HO2S pigtail has white

tape at the intervals, indicating the proper location of each retaining clip. When

connecting the sensor pigtail to the harness, ensure that the connector seal is

crushed uniformly all the way around between the connectors.

2. Connect the sensor harness connector.

3. Lower the vehicle

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Regards, Lee Davidian

Nov 05, 2010 | 1998 Cadillac Catera

2 Answers

Oxygen sensor i am having problem with


MANY THINGS WILL CAUSE RICH FUEL MIXTURE PROBLEMS.LIKE INTAKE MANIFOLD VACUUM LEAKS.EVAP CANISTER FUEL SOAKED.LEAKING EXHAUST MANIFOLD AND EXHAUST PIPES.LEAKING EGR VALVE GASKET.FAULTY FUEL PRESSURE REGULATOR. FUEL CONTROL SENSORS OUT OF CALIBRATION LIKE THE ECT IAT MAF SENSOR AND FAULTY STUCK OPEN FUEL INJECTORS.

Jun 03, 2010 | 1997 Cadillac DeVille

1 Answer

Plugs keep fowling out within 7 - 10 days


Check the oxygen sensor on the car. It will be located either in the exhaust pipe or the exhaust manifold. The oxygen sensor will either have the car run lean or rich depending on the anount of oxygen it registers sending a voltage signal either high or low to the power train control module. The pcm then will signal the other sensors to either burn more fuel or less fuel. Remove the oxygen sensor and inspect it, and if it looks carboned up then replace it. Hope this will help you.

May 25, 2010 | 2001 Dodge Stratus

1 Answer

Oil change on a 1987 4000s audi


Normal, indicates oil cleaning engine. Change oil every 3000 miles. Car may be running a little rich, have oxygen sensors checked, located on manifold underneath car. Also check egr valve for leak.

Jun 30, 2009 | 1987 Audi 4000 S

2 Answers

I need location of oxygen sensor on a 2001 town & country


ALL of your oxygen sensors are located i your exhaust system Your exhaust system starts at the exhaust manifold on the side of the engine and ends at the tail pipe by you back bumper. Your vehicle oxygen sensors are 4 of them there are two on each side of your exhaust the are actually screw into the exhaust they are like the nose of you engine to read how rich/lean the car is running. The are pretty simple to replace, they look kinda like spark plugs with wires attached to them the wires are usually colored white black and grey with plug connections on the end. To replace get a oxygen sensor socket and a ratchet and unscrew this socket can be bought at almost any auto parts place like auto-zone etc. Good luck and thanks for using FIX YA

Mar 22, 2009 | 2001 Chrysler Town & Country

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