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Put new plugs and wires and o2sensor and engine is still missing

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Engine dont wor right or dont start?
Hawe you checked air flow sensor and vacum leaks?

Posted on Mar 17, 2011

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Have no power on exceleration put in new plugs wires cap new carb and computer has 130 lb compresion on all cylinder


Plugged catalytic converter , Do a exhaust back pressure test ! Pull the O2sensor install back pressure gauge .

Mar 17, 2015 | Cars & Trucks

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01 a6, cyl 1 2 3 show misfire on obd2 scan above idle,plugs wires coil injectors fuelfilter o2sensors allgood


What is the code you are getting? Have you checked the engines compression and all cylinders are in good shape? Do that test and get back to me.

Jun 16, 2012 | 2001 Audi A6

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WIRING DIGRAM PLUG WIRES


so what are you working on make model and engine and year

Apr 25, 2012 | Oldsmobile Regency Cars & Trucks

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Missing


engine missing could be caused by faulty spark plugs and wires,bad ignition coils,dirty fuel injectors,leaking egr valve,low cylinder compression,intake vacuum leaks.many things will cause engine to miss, first do minor fix,replace distributor cap and rotor,replace spark plugs and wires,clean fuel injectors,replace fuel filter and air filter,if this minor tune up dont help engine and engine still missing, do a vacuum test and compression test to check condition of engine.engine could be worn out have low compression by worn valves and pistons rings.

Jan 04, 2012 | 1995 GMC Jimmy

1 Answer

I have a 1998 isuzu Amigo 2.2L 4 cylinder. I get 2 codes that stay on all the time and I can't figure out the problem: PO300 and PO141(pending). I have trouble starting it, exhaust smells bad at times,...


P0141 O2Sensor Heater Circuit Malfunction (Bank #1 Sensor #2)
P0300 Random/Multiple Cylinder Misfire Detected

The random multiple cylinder misfire can be caused by a bad O2 Sensor.

Try to change the O2 Sensor out, they can be tricky though, with the threads sometimes becoming gauled if removed when cold.

REMOVAL & INSTALLATION
  1. Start the engine and allow it to reach normal operating temperature, then turn the ignition switch OFF.
  2. Disconnect the negative battery cable.
  3. Open the hood and locate the O2sensor connector. It may be necessary to raise and safely support the vehicle for access to the sensor and its connector. NOTE: On a few models, it may be necessary to remove the passenger seat and lift the carpeting in order to access the connector for a downstream O2sensor. Fig. 1: Since sensor locations vary between vehicles, the first step in removal is to locate the O2sensors (arrows) . . . 90914p02.jpg
    Fig. 2: . . . and the sensor connector (2), which is usually near the O2sensor (1), but removed enough from the heat of the exhaust system 89714p26.jpg
    Fig. 3: Disengage the sensor pigtail connector half from the vehicle harness connector half 90914p03.jpg
    Fig. 4: For flange type sensors, loosen the hold-down fasteners . . . 90914p04.jpg
    Fig. 5: . . . which happen to be nuts in this particular case - some models may use bolts rather than nuts 90914p05.jpg
    Fig. 6: Then, pull the sensor out of the exhaust component 90914p06.jpg
    Fig. 7: For screw-in type sensors (arrow) . . . 89714p22.jpg
    Fig. 8: . . . either use a box end wrench to loosen the sensor or a socket designed expressly for this purpose . . . 89714p23.jpg
    Fig. 9: . . . then remove the sensor from the exhaust component 89714p24.jpg

  4. Disengage the O2sensor pigtail connector from the vehicle harness connector. NOTE: There are generally 2 methods used to mount an O2sensor in the exhaust system. Either the O2sensor is threaded directly into the exhaust component (screw-in type) or the O2sensor is retained by a flange and 2 nuts or bolts (flange type). WARNING
    To prevent damaging a screw-in type O2sensor, if excessive force is needed to remove the sensor lubricate it with penetrating oil prior to removal. Also, be sure to protect the tip of the sensor; O2sensor tips are very sensitive and may be easily damaged if allowed to strike or come in contact with other objects.
  5. Remove the sensor, as follows:
    • Screw-in type sensors: Since O2sensors are usually designed with a permanently-attached wiring pigtail, it may be necessary to use a socket or wrench that is designed specifically for this purpose. Before purchasing such a socket, be sure that you can't save some money by using a box end wrench for sensor removal.
    • Flange type sensors: Loosen the hold-down nuts or bolts and pull the sensor out of the exhaust component. Be sure to remove and discard the old sensor gasket, if equipped. You will need a new gasket for installation.
  6. Perform a visual inspection of the sensor. Black sooty deposits may indicate a rich air/fuel mixture, brown deposits may indicate an oil consumption problem, and white gritty deposits may indicate an internal coolant leak. All of these conditions can destroy a new sensor if not corrected before installation. To install:
  7. Install the sensor, as follows: NOTE: A special anti-seize compound is used on most screw-in type O2sensor threads, and is designed to ease O2sensor removal. New sensors usually have the compound already applied to the threads. However, if installing the old O2sensor or the new sensor did not come with compound, apply a thin coating of electrically conductive anti-seize compound to the sensor threads. WARNING
    Be sure to prevent any of the anti-seize compound from coming in contact with the O2sensor tip. Also, take precautions to protect the sensor tip from physical damage during installation.
    • Screw-in type sensors: Install the sensor in the mounting boss, then tighten it securely.
    • Flange type sensors: Position a new sensor gasket on the exhaust component and insert the sensor. Tighten the hold-down fasteners securely and evenly.
  8. Reattach the sensor pigtail connector to the vehicle harness connector.
  9. Lower the vehicle.
  10. Connect the negative battery cable.
  11. Start the engine and ensure no Diagnostic Trouble Codes (DTC's) are set.
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Oct 31, 2010 | 1997 Pontiac Grand Am

2 Answers

2003 ford f150 misses at idle starts fine runs fine new fuel filter new o2sensor


One thing to take a look at is the vacuum elbow on the back of the throttle body.

Remove the plastic throttle body cover, and check the vacuum line.

Ignore the IAC notation, this is the only picture I have handy, showing the vac line just above the IAC.

1a489d1.jpg

Dec 19, 2009 | 2004 Ford F150

2 Answers

Replace oxygen sensor


REMOVAL & INSTALLATION Start the engine and allow it to reach normal operating temperature, then turn the ignition switch OFF. Disconnect the negative battery cable. Open the hood and locate the O2sensor connector. It may be necessary to raise and safely support the vehicle for access to the sensor and its connector. NOTE: On a few models, it may be necessary to remove the passenger seat and lift the carpeting in order to access the connector for a downstream O2sensor. Disengage the O2sensor pigtail connector from the vehicle harness connector. NOTE: There are generally 2 methods used to mount an O2sensor in the exhaust system. Either the O2sensor is threaded directly into the exhaust component (screw-in type) or the O2sensor is retained by a flange and 2 nuts or bolts (flange type). WARNING To prevent damaging a screw-in type O2sensor, if excessive force is needed to remove the sensor lubricate it with penetrating oil prior to removal. Also, be sure to protect the tip of the sensor; O2sensor tips are very sensitive and may be easily damaged if allowed to strike or come in contact with other objects. Remove the sensor, as follows: Screw-in type sensors: Since O2sensors are usually designed with a permanently-attached wiring pigtail, it may be necessary to use a socket or wrench that is designed specifically for this purpose. Before purchasing such a socket, be sure that you can't save some money by using a box end wrench for sensor removal. Flange type sensors: Loosen the hold-down nuts or bolts and pull the sensor out of the exhaust component. Be sure to remove and discard the old sensor gasket, if equipped. You will need a new gasket for installation. Perform a visual inspection of the sensor. Black sooty deposits may indicate a rich air/fuel mixture, brown deposits may indicate an oil consumption problem, and white gritty deposits may indicate an internal coolant leak. All of these conditions can destroy a new sensor if not corrected before installation. To install: Install the sensor, as follows: NOTE: A special anti-seize compound is used on most screw-in type O2sensor threads, and is designed to ease O2sensor removal. New sensors usually have the compound already applied to the threads. However, if installing the old O2sensor or the new sensor did not come with compound, apply a thin coating of electrically conductive anti-seize compound to the sensor threads. WARNING Be sure to prevent any of the anti-seize compound from coming in contact with the O2sensor tip. Also, take precautions to protect the sensor tip from physical damage during installation. Screw-in type sensors: Install the sensor in the mounting boss, then tighten it securely. Flange type sensors: Position a new sensor gasket on the exhaust component and insert the sensor. Tighten the hold-down fasteners securely and evenly. Reattach the sensor pigtail connector to the vehicle harness connector. Lower the vehicle. Connect the negative battery cable. Start the engine and ensure no Diagnostic Trouble Codes (DTC's) are set. Posting pictures next......

Jun 06, 2009 | 2001 Toyota Tacoma

1 Answer

Foul no 4 plug new cat plugs wires dis cap rotar button only happens in hot weather taken to dealership new plugs new o2sensor one week later same problem


replace the valve seals for # 4 cylinder, they are allowing excessive oil to be pulled into the combustion chamber through the valve guides, these go because the #4 cylinder runs the hottest..

May 11, 2009 | 1997 GMC Sierra

1 Answer

98Eclipse 2.0 nonTurbo 5speed 180,000 miles ,code PO301


The po301 is a misfire code. The backfire can be caused by a excessive amount of fuel, bad valve timing etc.
My guess is you have damage to an exhaust valve that may have occurred when you had the timing belt problem.A compression test will indicate if you have a leaking exhaust valve.The reason for the backfire is the exhaust valve is still partially open when the spark plug fires.

Jan 03, 2009 | 1998 Mitsubishi Eclipse

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