Question about 1998 Nissan Pathfinder

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My 1998 Pathfinder sputters and eventually stalls out when the engine gets warm after about 15 minutes driving and no sensor code comes up?

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  • Trish Caillat Aug 04, 2010

    Furthermore, once the car shuts down for a while and the engine cools, it starts right back up again as normal.

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  1. If you have a carburetor, you may have a bad accelerator pump or power circuit: Replace accelerator pump or replace carburetor.
  2. There may be a vacuum leak: Check and replace vacuum lines as required.
  3. The fuel pressure regulator may be operating at too low a pressure: Check fuel pressure with a fuel pressure gauge. Replace fuel pressure regulator. (Generally not a DIY job)
  4. Idle speed set incorrectly: Set idle speed to specs.
  5. There may be some type of ignition problem: Check and replace distributor cap, rotor, ignition wires and spark plugs.
  6. There may be a fault in the computerized engine control system: Check engine control systems with a scan tool. Test circuits and repair or replace components as required. (Generally not a DIY job)
  7. The EGR valve may be bad: Replace EGR valve.
  8. The engine may have mechanical problems: Check compression to determine engine condition.
  9. The fuel injectors may be dirty: Clean or replace fuel injectors.
Thanks!!
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Posted on Aug 04, 2010

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Hi, to me the problem sounds like it could be an oxygen sensor problem. but as your not getting no codes then this could mean the catalytic converter is up the shoot if you have one fitted on your car.

the reason i say this is that your having problems when the engine is warm and if it then dont start till the engines cool then this points towards oxygen sensor failure but as your not getting a error code come up then this could mean your cat is up the shoot but that is as long as the oxygen sensor comes after the cat in the exhaust if the sensor comes before the cat then it points towards the sensor being at fault.

the reason it points towards the oxygen sensor is due to the fact the when the engine is cold the sensor is not working as it only starts working when the engine reaches a certain temp so if your car runs perfect when cold and then plays up when hot then this is usually a clear sign that the oxygen sensor(or lambda sensor for its proper name) is starting to fail, now usually when the car cuts out it wont start again until the engine has cooled and the sensor then switches off so your car will run again once its cooled down

their are a couple of things you could also check, check all the vacumn hoses that run around the engine, the ones coming from the mass air flow sensor check these for signs of splitting and replace if you see any.

but failing that i would check if the oxygen sensor comes after the cat and if it does then the chances are the cat is no good, how ever to rule out throwing money down the drain it would be a good idea to get the emmisions checked to make sure it was the catalytic converter at fault

let me know how you get on or if you need further assistance ok

Posted on Aug 05, 2010

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  • Nissan Master
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The engine would cut out when coming to a stop or making a turn but was fine when giving it gas. I suggest a fuel system flush done and a new fuel filter. First check fuel pressure. Other could any vacuum leak, test it.

Try properly setting the idle and testing the IAC (intake air valve) to make sure it's working. Also test the coolant temp sensor and the connector for corrosion on both of these items. Also possibly a failed injector if it sputters and doesn't idle or run smoothly. The fact that it almost stalls and tries to recover could be one of these issues.

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Posted on Aug 04, 2010

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