Question about 1996 Dodge Neon

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For starters I've had the code for multiple cylinder misfires and that time I could get the car to go 30 mph but no more. No matter how much I pushed the pedal there was no response, I couldn't even hear the engine. Then I was driving on the expressway at 75mhp and the power was suddenly gone and it slowed down to a stop and shut itself off. What happened?

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  • jfoote02 Feb 24, 2009

    I did put in a fuel filter about a month or so ago. But the problems started two weeks ago. I've also put anti-freeze for gas in the fuel tank, as far as the amount of fuel in the tank it was at like a quarter the day it shut off. The check engine light always turns on.

  • Mike Butler
    Mike Butler May 11, 2010

    had a 95' do similar, got me to work when it was cool in the morning then a combination of heat from driving & pavement I guess, on way home, it died out. Sat, 20 min. trying to figure out what to do, and tried it again, started & got me home. Next day, same thing, same place. Had a fuel pressure gauge with me, (as I suspected fuel pump) hooked it up, and sure enough, only had about 2 psi when should have been 48-50psi. Waited 20 minutes, re-tested pressure was back up to 48, and got me home. If/when it quits, did you find sitting for 10-20 minutes it would start again?. Are you getting any codes from dash by cycling key?

  • Mike Butler
    Mike Butler May 11, 2010

    Have you had your fuel pressure tested, and or fuel filter changed lately? Try to pay attention to fuel level in tank,weather,hot/cold, how long you've been driving/engine running, and after it has time to cool down, aprrox. 1/2 hr, try starting it again. let us know. Have you tried adding "Heet" or similar in case of moisture in tank?

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Puul out all the belts and vave somebody to star the car , take look to the crank pulley if speed to much im thinking is timing problem. think about the mil. dont keep trying to star the car the valves can brake

Posted on Feb 25, 2009

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2 Answers

Why the loss of power and po300 code?


HARD TO SAY WITH OUT BEING THERE BUT THIS MIGHT HELP .
Crankshaft sensor Was the trouble with my 99 Chevy truck after replacing many components like coil cap rotor wires and so on .
http://www.obd-codes.com/p0102 Code P0300 Causes and Fixes Code p0300 is a code that is generated when your engine has a misfire that is not related to only one cylinder. Sometimes this code will be set in addition to other codes such as p0301 which means that there is a misfire on cylinder 1 (cylinder 1 is the number one cylinder when looking at the firing order. It is generally the forward most cylinder on the engine.). If these engine codes are present as well the you should diagnose those first as they are probably causing code p0300.
This code will set your check engine light and needs to be fixed as soon as possible. If it is not then you will probably need to replace your catalytic converter as well as the problem that is causing your misfire.
There are many causes for this obd code. Since it is a "random misfire" or "multiple misfire" this means that the misfire is on different cylinders and not just one all the time.
Common Causes
  • Low Fuel Pressure
  • Vacuum Leak
  • EGR system malfunction
  • Internal Engine Problems (such as low compression)
Less Common Causes
  • Faulty Coil
  • Faulty Spark Plugs and/or Wires
  • Camshaft or Crankshaft sensors
  • Ignition module
  • Computer

Jun 12, 2014 | 1998 Chevrolet Tahoe

1 Answer

Check engine light is on, any speed above 30mph it gives a flashing check engine light, acceleration feels bogged down, engine idle is rough and shakes the truck


I'm guessing you have over 100000 miles , definitely replace all the spark plugs and ignition cables and cap and rotor if your motor is such equipped. If you want a better idea of which cylinders are misfiring, go to your local Checker or Autozone and ask them for code retrieval, codes stored will give you an idea of what is failing. Code po300 is multiple misfire, po301 is cyl #1, po302 is cyl #2 and so forth.

Mar 09, 2014 | 2003 Chevrolet Silverado 1500

2 Answers

I installed a timing belt on my 03 kia sedona. a piece of the cover broke off and caused the cam to jump 6 teeth. i reset the timing am now getting code p300 p303 and p305. guess it is time to replace the...


yeah, it is time to replace your cylinder, because the P300 meansRandom/Multiple Cylinder Misfire Detected, the P303 means Cylinder 3 Misfire Detected, the P305 means Cylinder 5 Misfire Detected.
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Oct 29, 2012 | Kia Sedona Cars & Trucks

1 Answer

Have a 99 s10 with multiple cylinder misfire code. I've changed coil packs, ignition module(used) plugs, fuel filter, timing chain tensioner. Very little power. Any other suggestions as to what can...


Are your spark plugs oily,if so then your piston rings are bad.A compression test will tell you that these cylinder misfires will be low in compression,timing could be off.

Oct 23, 2012 | Cars & Trucks

2 Answers

Multiple misfire


Hi Jason:
A Random/Multiple Cylinder Misfire Detected unfortunately doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.

A code Random/Multiple Cylinder Misfire Detected 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.

Feb 26, 2012 | 2001 Pontiac Grand Am SE

2 Answers

Engine cranks but wont start has an obd p 300 &p304 help me


P0300 Random/Multiple Cylinder Misfire Detected, the 304 is for cylinder number 4 any of these could be wrong 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

Jun 21, 2011 | 1996 Eagle Vision

1 Answer

2 minutes afer starter car engine ligth come flasher and code p0300


P0300 Random/Multiple Cylinder Misfire Detected This is sometimes a symptom to a clogged fuel filter or fuel line. When was the last time the fuel filter was changed? There are a lot of problems that can lead to a random cylinder misfire. lack of fuel, lack of spark, lack of compression. Check all three of these. Please let me know if this answers your quesion and please rate my response for me. Thank you

Apr 09, 2010 | 1995 GMC Jimmy

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