Question about 2000 Nissan Sentra

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The cilynder #1 and spark plug is wet with gas,I did chenged the injector an fuel pressure regulator,still the same engine is shaking, nissan sentra 1993

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  • Barry May 11, 2010

    Is this a DIS car? If it is check the coil pack for that cylinder, sometimes they will fail and only fire on one side.

  • yadayada
    yadayada May 11, 2010

    did you check compression on that cylinder ?

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  • Nissan Master
  • 705 Answers

Did you change the spark plug?? Your car (1993) has a distibutor assy, which means it has ignition wires for each plug. How are your wires??cap?? rotor?? Have you ever done ignition tune up?? If the answer is yes and you have already installed new injector and pressure regulator (althoug it still could be a injection issue/ECM or computer, because ECM is what drives the injectors. If the ECM or wiring to #1 injector has an issue, the injector will not fire off and put gas into the cylinder, resulting in a misfire.) Remove #1 injector connector and check to see if you have power/12V on one side of the connector. If you have 12V there, than check the other wire for continuity to the ECM. You will need wiring diagram to find the right wire color at the ECM. That other wire goes into the ECM to the driver which opens and closes the injector depending on your demands as far as gas pedal input. That driver may be bad, causing the injector not to shoot gasoline. Than I would be looking into a engine issue, such as burned valve, or head gasket problem (coolant getting into #1 cylinder, flooding your spark plug). Tough to diagnose over the computer and not looking at it my self. Let me know what you find.

Posted on Dec 21, 2008

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Priority Action Part Type Cause
1 Inspect Battery Battery Discharged or Faulty.
2 Inspect Battery Cable Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Fuel Filter Clogged or Dirty Fuel Filter.
3 Inspect Distributor Cap Distributor Cap Cracked or Burned.
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6 Inspect Wireset Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter Starter Motor Faulty.
9 Inspect Fuel Pump Low Fuel Pressure.
10 Inspect Solenoid Switch Faulty Starter Solenoid Switch.
11 Inspect Relay - Fuel Pumpat Faulty Fuel Pump Relay.
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14 Inspect Starter Drive Faulty Starter Drive.
15 Inspect Fuel Injector Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank Fuel Tank Empty.
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20 Inspect Distributor Worn, Loose, or Incorrectly Installed Distributor.

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