Question about 1998 Nissan Pathfinder

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1998 nissan pathfinder p0300 code loss of power at take off replaced wire plugs cap and rotor also tps and mass sensor and valve cover gaskets leaking and replaced all vacuum lines on vehicle what is wrong?

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  • Nissan Master
  • 35,737 Answers

DTC P0300 indicates random multiple misfires were detected. You have replaced a lot of parts but probable causes include:
1. Fuel contamination (not mentioned above)
2. Ignition module (included above?)
3. Fuel system

Posted on May 07, 2014

Testimonial: "very informative thanks"

  • Jonathan Hunter
    Jonathan Hunter May 08, 2014

    would the crank angle sensor be the same thing and if so where is it located?

  • Scott Jun 23, 2014

    My frontier and Altima did the same thing. It was the distributor on both. It started with wanting to stall and using more gas than normal. Have it checked before it fouls out the entire ignition system

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6ya6ya
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Posted on Jan 02, 2017

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  • 33 Answers

SOURCE: 1998 nissan sentra wont start

have you checked the timing belt?

Posted on Feb 17, 2009

johnjohn2
  • 5763 Answers

SOURCE: I have replaced EGR,pvc,plugs,wireset, cap

check aux air control valve , thats what controls the idle it may be bad,also with that kind of mileage i would replace the mass air flow sensor ,do that first, good luck , the mass air flow sensor has alot to do with your gas mileage .

Posted on Nov 07, 2009

  • 1374 Answers

SOURCE: leaking coolant from head gasket area and valve

Well the head gasket job will cover the valve cover gasket ( you have to do one to get to the other) Bring it to a repair shop its about a $1500 job.

Posted on Apr 19, 2010

kel1guy2002
  • 3740 Answers

SOURCE: R&R EGR Valve 97 Nissan

It takes a 17 mm wrench to losen the tubing on both sides of the valve. Then it is a matter of unmounting the bracket and pulling off the vacuum line. Make sure that you losen both lines BEFORE unmounting the bracket or you will never get it off. Sometimes getting the tube fitting (flare nut) loose requires a flare nut spanner wrench. Some EGR vlaves on have one flare unt and have gasket under the EGR valve where it mates to the manifold. Make sure you replace the gasket if yours has one.

(flare nut spanner wrench)
http://t3.gstatic.com/images?q=tbn:JXlnPyZf9DSRLM:http://www.samstagsales.com/images/sw24-11x13.jpg

I also recommend that you use a long piece of solid copper wire #10 to push through the tubes to remove the carbon build up.

It really is a matter of time. The most difficult thing about changing an EGR valve is getting the flare nut(s) loose.

Thanks for using FixYa.

Kelly

Posted on Jun 22, 2010

em1cl
  • 463 Answers

SOURCE: Vehicle: 1998 Nissan Pathfinder

Hello,
When the MAF on most vehicles reach a point of preventing the engine from starting, you can usually just unplug it and the engine will start. If that doesn't work-
You may want to try having the O2 sensor, ( Oxygen sensor ), checked. It works with other components of the emission system and can cause similar symptoms as the MAF, including preventing the engine from starting.

Donnie

Posted on Feb 21, 2011

Testimonial: "Other similar issues are the cam position sensor, which is located inside the distributor. It's easier to just replace the distributor."

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1 Answer

What is code p0300?


P0300 - Random, Multiple Cylinder Misfire Detected Fault Code Definition
  • Random, Multiple Misfire Detected
Symptoms
  • Check Engine Light flashing
  • Rough running, hesitation, and/or jerking when accelerating
  • In some cases, there may be performance problems, such as dying at stop signs or rough idling, hesitation, misfires or lack of power (especially during acceleration), and a decrease in fuel economy
Common Problems That Trigger theP0300
  • Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable)
  • Incorrect ignition timing
  • Vacuum leak(s)
  • Low or weak fuel pressure
  • Improperly functioning EGR system
  • Defective Mass Air Flow Sensor
  • Defective Crankshaft and/or Camshaft Sensor
  • Defective Throttle Position Sensor
  • Mechanical engine problems (i.e.-low compression, leaking head gasket(s), or valve problems

Jul 25, 2014 | 2000 Dodge Durango

2 Answers

Why the loss of power and po300 code?


HARD TO SAY WITH OUT BEING THERE BUT THIS MIGHT HELP .
Crankshaft sensor Was the trouble with my 99 Chevy truck after replacing many components like coil cap rotor wires and so on .
http://www.obd-codes.com/p0102 Code P0300 Causes and Fixes Code p0300 is a code that is generated when your engine has a misfire that is not related to only one cylinder. Sometimes this code will be set in addition to other codes such as p0301 which means that there is a misfire on cylinder 1 (cylinder 1 is the number one cylinder when looking at the firing order. It is generally the forward most cylinder on the engine.). If these engine codes are present as well the you should diagnose those first as they are probably causing code p0300.
This code will set your check engine light and needs to be fixed as soon as possible. If it is not then you will probably need to replace your catalytic converter as well as the problem that is causing your misfire.
There are many causes for this obd code. Since it is a "random misfire" or "multiple misfire" this means that the misfire is on different cylinders and not just one all the time.
Common Causes
  • Low Fuel Pressure
  • Vacuum Leak
  • EGR system malfunction
  • Internal Engine Problems (such as low compression)
Less Common Causes
  • Faulty Coil
  • Faulty Spark Plugs and/or Wires
  • Camshaft or Crankshaft sensors
  • Ignition module
  • Computer

Jun 12, 2014 | 1998 Chevrolet Tahoe

3 Answers

Cylinder misfire p0300


START THE ENGINE AND LIFT THE IGNITION WIRE LISTEN FOR SPARKS.IF ONE OR MORE CYLINDERS DON'T CHANGE THE WAY IS RUNNING ,YOU GOT THE BAD CYLINDER. LOOK FOR BURN MARKS ON THE WIRE(BLUE/WHITE SPOT)IF SO REPLACE THE WIRE.SOME TIMES VALVE COVER LEAKING IN THE TUBE. REPLACE VALVE COVER GASKET,BLOW THE OIL OUT BEFORE REMOVE THE SPARK PLUGS.REMOVE THE SPARK PLUGS AND INSPECT THE ELECTRODE.GOOD ELECTRODE WILL BE WITH SHARP EDGE ,IF ROUND OR LIKE CONE REPLACE WITH DENSO OR NGK ORIGINAL EQUIPMENT . REMOVE THE DISTRIBUTOR CAP AND LOOK FOR OIL IN THE CAP. IF OIL INSIDE REPLACE DISTRIBUTOR. IF NO OIL INSPECT THE CAP AND ROTOR FOR THICK WHITE DEPOSIT OR ROTOR FOR BLACK BURN MARKS. REPLACE CAP AND ROTOR.IF EL.SYSTEM IS OK SPRAY CARB CLEANER ON INTAKE MANIFOLD AND LISTEN FOR RPM CHANGE.IF CHANGE THE RPM REPLACE MANIFOLD GASKET.

Mar 29, 2014 | 1998 Acura Integra Type R

2 Answers

I HAVE A P0300 OBD CODE I DID A COMPRESSION TEST TO ENGINE AND IT PASS THE TEST,I DID CHECK EGR VALVE,CHANGE SPARK PLUGS,IGNITION WIRES, CAP AND ROTOR, I DID CHECK TPS SENSOR MAF SENSOR,FUEL PRESSURE,AND...


p 0300 code is for random misfires
random misfires are more from dirty /faulty injectors or low fuel pressure than anything else
have a pressure test done to check pressure regulator , filter and pump operation
use a can of quality injector cleaner or remove and clean the injectors

Apr 06, 2017 | 1997 Nissan Pathfinder

1 Answer

I have a 2002 GMC Sierra 1500. 4.3 liter engine. I brought it to autozone and they put the gauge on it and got two codes P0140 and P0300. I had my distributor cap replaced, ignition rotor, plugs ,wires,...


Clean mass air flow sensor with a nonchlronated brake cleaner,install new air filter and check all vacuum lines for leaks then check for vacuum leak around or at intake manifold.Code P0140 is for mass air flow sensor code P0300 is a multiple misfire which more than likely is a vacuum leak possibly intake manifold gaskets leaking.

Apr 11, 2011 | 2002 GMC Sierra 1500

2 Answers

P0305 code, new plugs, wires, cap, rotor, coil, fuel filter and still getting p0305 code any good ideas?


means misfire in #5 cylinder. found this for you. hope this helps
Common Problems That Trigger the P0305
  • Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable)
  • Incorrect ignition timing
  • Vacuum leak(s)
  • Low or weak fuel pressure
  • Improperly functioning EGR system
  • Defective Mass Air Flow Sensor
  • Defective Crankshaft and/or Camshaft Sensor
  • Defective Throttle Position Sensor
  • Mechanical engine problems (i.e.-low compression, leaking head gasket(s), or valve problems
Common Misdiagnoses
  • Fuel Injectors
  • Oxygen Sensor(s)
  • Power Train/Drive Train problem

Jan 05, 2011 | 1999 Chevrolet Suburban

1 Answer

Leaking coolant from head gasket area and valve


Well the head gasket job will cover the valve cover gasket ( you have to do one to get to the other) Bring it to a repair shop its about a $1500 job.

Apr 19, 2010 | 1998 Nissan Pathfinder

1 Answer

96 olds ciera trouble codes p0122 p0300 missingthrough entire ran


A code P0122 may mean that one or more of the following has happened:
  • TPS not mounted securely
  • TPS circuit short to ground or another wire
  • Faulty TPS
  • Damaged computer (PCM)
Possible Solutions Some recommended troubleshooting and repair steps are:
  • Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
  • Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
  • If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
  • If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it's not rubbing on anything, grounding, etc. The code may come back.
A code P0300 may mean that one or more of the following has happened:
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer
Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak
in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Dec 13, 2009 | 1996 Oldsmobile Cutlass Ciera

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