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My car misfires on hard acceleration new plugs and O2 sensr

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Misfire po300


Error Code: P0300
Description:
Random/Multiple Cylinder(s) - Misfire Detected
Problem Area:
Air Intake System leaking.
Fuel Supply faulty.
Injector(s) faulty.
Ignition Cable(s) and/or Spark Plug(s) faulty.
Ignition coil(s).Exhaust Gas Recirculation (EGR) Valve stuck/open.
Camshaft Position Sensor faulty.
Low compression.
Wiring.

Solutions:
Check Misfire Recognition.
Check Air Intake System.
Check Fuel Supply.
Check Injector(s) and Injector Sealing.
Check Ignition Cable(s) and Spark Plug(s).
Check Ignition Coil(s).
Check Exhaust Gas Recirculation (EGR) Valve .
Check Camshaft Position Sensor.

Feb 25, 2014 | Chevrolet Cobalt Cars & Trucks

1 Answer

Mazda misfire


Yes. If the O2 sensor is faulty, it can tell the computer the fuel mixture is too rich when in fact is is too lean.

Jul 03, 2013 | Cars & Trucks

1 Answer

1997 honda civic idle and acceleration misfires


The first you should be taking when getting error code should be to replace the faulty spark plugs and their respective wiring. Also check for faulty distributor and ignition coil. If everything till now is fine then and only then go for cleaning throttle body.

Jun 25, 2013 | 1997 Honda Civic

1 Answer

02 sensor heater circut malfunction


htr ckt malfunctions are mostly due to worn or faulty htr elements in ur sensor. i would first chek all ur fuses to make sure u even have voltage going down to ur o2 sensr, if they check out good then safe to say ur o2 sensr is faulty an should b replaced....good luck

May 01, 2011 | 2003 GMC Sonoma Extended Cab

1 Answer

What can cause a 2005 Hyundai Sante Fe check engine light to come on and get all these codes: p0134 - o2 sensor circuit no activity detected (bank 1 sensor 1), p0151 -oxygen sensor circuit,low voltage...


i would check ur fuses that supply voltage to ur o2 sensors, their in the fuse box and usually r labeled o2 sensr. sounds like the o2 sensrs dont have power

Apr 09, 2011 | Hyundai Santa Fe Cars & Trucks

1 Answer

Vsc & check engine light on. Code reads cylinder 2 misfire I have changed the plugs swaped coil with another cylinder swaped vsv's swaped injector plugs with another cylinder always shows misfire #2...


You may need to look at your exhaust system. If you have a leak, your O2 sensors will send the wrong reading to your engine which will in turn tell your engine to fire differently. Your code will come up reading as a misfired bank. See if you have an exhaust leak first, then see about changing out the O2 sensors behind the leak.

Jun 21, 2010 | Cars & Trucks

1 Answer

O2 Sensor Problem?


yes an o2 sensor can cause those symptoms so can a minor vacuum leak --bad ignition wire -clogging fuel filter --sticking egr valve etc.

Mar 01, 2010 | 1999 Toyota 4Runner

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