Question about Nissan Sentra

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2002 Nissa Sentra 1.8l Starts fine but when

2002 Nissa Sentra 1.8l Starts fine but when warmed up and drops to around 7-800 RPM it begins to misfire consistently with short intermittent periods (less then 1/4 sec) of surging. Surging appears to be idle smoothing out then it begins to misfire again

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How many miles on it? I had to replace my engine at 220,000. When is the last time you had a tune up? Could be a couple of things. You might get more ideas on a Nissan forum.

Posted on Nov 05, 2013

Testimonial: "Problem Fixed 2002 Nissan Sentra 1.8 177000K runs smooth at warm up then rough at idle engine misfiring ECU would not throw any codes. Replaced MAF sensor and idle was the same but I then received P0302 cylinder 2 misfire. Swapped coils with #3 and same P0302. Swapped plugs and code changed to P0303 cylinder #3 misfire. Changed all plugs, runs fine. The plug had a hot soak failure. For some reason the ECU could not code the misfire until the MAF was replaced. I believe it was on the edge because when I cleaned the sensor the car failed to run any more. Yes, correct cleaner used."

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Surging idle speed

check your high idle valve may need to be replaced.situated at the side of throttle body.

good luck
cyril

Posted on Jul 26, 2008

mas66
  • 104 Answers

SOURCE: 1996 acura integra idle surging?

Check this out, http://www.hondahookup.com/forums/showthread.php?t=147179
Step by step guide to diagnosing idle issues on your honda.

Posted on Oct 25, 2008

66 chrgr
  • 1011 Answers

SOURCE: 2000 durango 5.2 cold starts, engine stalls or rpm surging

i know this may sound stupid but if your battery is old or a little weak on this vehicle the idle air control solenoid will act speradicley hunting for were it should be and the vehicle will stall.replace battery

Posted on Feb 01, 2009

  • 12 Answers

SOURCE: rough idle / engine surges until power is applied

Sounds like a possible vaccume hose leak?

Posted on Feb 07, 2009

godspeed808
  • 125 Answers

SOURCE: olds alero 2.4 idle fuel pressure

most likely idle air control sensor or low engine coolant I know sounds funny but IAC uses coolant to regulate idle. Idle air control valve or throttle body positioning sensor.

Posted on Feb 26, 2009

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