Question about 1997 Ford Thunderbird LX

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I just need to know what the vdescription is for the code. the code came up P0300

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PO300 IS THE GENERIC CODE FOR AN UNIDENTIFIED ENGINE MISFIRE. iT COULD BE CAUSED BY A SINGLE OR MULTIPLE CYLINDERS. BUT THE FREQUENCY OF THE MISFIRE IS NOT SUFFICIENT FOR THE MONITOR TO PINPOINT. POSSIBLE CAUSES CAN BE LARGE VACUUM LEAKS, EGR LEAKAGE INTO THE INTAKE MANIFOLD, EGR PASSAGE RESTRICTIONS, LOW FUEL PRESSURE, DIRTY FUEL INJECTORS, IGNITION COIL MALFUNCTIONS.
HOPE YOU FIND THIS USEFUL. HAVE A GOOD DAY.

Posted on Mar 14, 2011

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P0300 = Random multiple misfire detected

Posted on Mar 14, 2011

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1998 Pontiac grand Prix gt has motor vibration when started replaced plugs, maf code is po300 what could this be


Melissa, P0300 Random Cylinder Misfire, could be caused by bad plug wires,bad /weak coil, Ign. module,clogged bad fuel injectors,etc. will probably have to take it to a good tech to diagnose and est. repair. Check the attached links more info,instruction and guides, Good luck
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I am getting a po300 code i changed out the coils and still have a po300 code my car has a problem pulling off then seems to run good but still has a miss


still has a miss Larry, P0300 does mean misfire condition, but does not mean the coils were bad. Bad plugs,wires, injectors, coils, etc. can through this code.
Check the attached links, troubleshooting,instruction and guides, a lot of good info. Good luck .
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Code p0300 " multiple cylnder mis fire'


Hi there:

DTC P0300 - Random Misfire / Random/Multiple Cylinder Misfire Detected
Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.



A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.


Symptoms may include:

- the engine may be harder to start
- the engine may stumble / stumble, and/or hesitate
- other symptoms may also be present


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.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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try here
www.engine-light-help.com
what kind of shape are your plug wires in ?

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