Question about 2000 Kia Spectra

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Diagnostic code p0301 idles rough after warming up, check engine lite is on, when accelerating check lite flashes and car bogs down letting up on gas helps engine catch up

Posted by m j fiorini on

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  • Anonymous Mar 28, 2014

    getting p0301

  • Anonymous Mar 28, 2014

    check engine lite flash some time while driving

  • Anonymous Mar 28, 2014

    Check engine lite start flashing while driving

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2 Answers

Colin Stickland

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Try taking the O2 sensor out the before the cat and try it ,yes i know it will be noisy but try it in case cat is blocked ,if that doesnt work then change the coil pack and check the wiring loom to the coil pack in case the wiring plastic coating has gone all powderey

Posted on Dec 06, 2011

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Greg Bernett

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P0301-

Trouble Code Conditions:
Engine runtime 3 seconds, engine speed change under 1200 rpm, and the PCM detected a misfire condition present in one cylinder during the 200 (Catalyst) or 1000 revolution (Emission) test range.Note: If the misfire is severe, the MIL will flash on/off on the 1st trip!

Possible Causes:

  • Fuel metering (fuel injector dirty) problem affecting Cylinder 1
  • Base engine (compression) problem affecting Cylinder 1
  • Ignition system (spark plug or plug wire) problem on Cylinder 1

Posted on Dec 06, 2011

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Related Questions:

1 Answer

Quest idles rough and when accelerating and service engine light is flashing


Nobody can answer correctly until you (or let someone) read OBD code.

"Check Engine Light flashing" means there is (or are) potential error on system.
(Flashing = Potential. maybe temporally, stays on = permanent. need to fix)
there are 100s of error codes.

When you go Autozone or some autoparts store maybe AAA, they can connect "OBD code reader" and read error code for you for free.
You can buy cheap code reader under $30 for now and future use.

Code may show like P0301, it means misfire on #1 cylinder for example.
sometimes just gas cap not tight closed show error code.
Reading OBD error code is starting point .

Feb 26, 2016 | 2005 Nissan Quest 3.5

2 Answers

P0456 and p0301


The most common misfire causes on the cars I've worked on have been:
  1. Spark plugs
  2. Spark plug wires
  3. Ignition coil
  4. Fuel injector
  5. Wiring to fuel injector
  6. Timing Belt
  7. Vacuum leak or stuck open EGR
  8. Contaminated fuel or bad fuel pump
  9. Weak compression
  10. Blown head gasket


Article Source: http://EzineArticles.com/1982987

Feb 11, 2012 | 2005 Dodge Neon

3 Answers

Would an idle control valve cause a car not to accelerate?


no, idle air control valve is literally to control your idle speed.
what happen when you press on gas? car shakes, RPM goes up, or engine just bogs down?

Mar 09, 2010 | 2004 Infiniti I35

1 Answer

Loss of power on acceleration. engine bucking.


check transmission fluid.change fuel filter and air filter.try changing up on where you buy gas .because bad gas causes problems.

Jun 26, 2009 | 1999 Ford Taurus

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