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P 302 AND P0304 MISFIRING

ALL HAS BEEN DONE COIL ,PLUGS WIRES ROTOR AND CAP . CAN THE ECU CAUSE THE MISFIRING OF 2 AND 4 AND ALSO THE KNOCK SENSOR ?

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6ya6ya
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Posted on Jan 02, 2017

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onyeredson
  • 404 Answers

SOURCE: 1993 volvo 850 glt

Hello,
Have you made sure the rotor is turning in the distributor, as this sound like a cambelt failure.
Sorry to bear bad tidings if this is so.
Paul 'W'
Onyer~EDson(:0) {#><U.K.
Please remember to politely rate my effort!

Posted on Jan 21, 2009

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  • 1 Answer

SOURCE: car is stalling and idleing irradically.

I Would Suggest That You Complete A Engine Cylinder Leak Down Test.....(not A Compression Test But A Leak Down Test) this will tell you if you have internal problems....possible worn rings or a burnt valve(s) I would use a smoke machine to check for vacuum leaks also. Good Luck

Posted on Mar 26, 2009

timeclock624
  • 22 Answers

SOURCE: Happy holidays,my 89 volvo 240dl starts and runs

It is most likely that you have a hole in your vacuum hoses (check your flame trap too) or your 02 sensor is bad. i would check both. good luck:)

Posted on Dec 04, 2010

  • 3074 Answers

SOURCE: 1995 volvo 940 base have changed plugs,wires,

may be the ignition modulator

Posted on Jan 11, 2011

Testimonial: "The ignition module was the last thing we replaced.Had been hit in front end last month on that side. Now has whole tune up .Up and running again."

bluesman1956
  • 388 Answers

SOURCE: engine stalls out when put

If the mass airflow sensor is unplugged the on board computer can't read the air flow to the fuel system, hence the dying. Their is a cheap remedy that may work, you can purchase a MAS sensor cleaner and after you pull the sensor simply spray it liberally and it may work again. If this doesn't help you will need to replace the MAS sensor for the vehicle to run correctly.

Posted on Feb 18, 2011

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1 Answer

? code p0304 mean


P0304 Code - Cylinder #4 Misfire


Symptoms may include:
  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Causes A code P0304 may mean that one or more of the following has happened:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • 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.

Jun 30, 2015 | Cars & Trucks

1 Answer

I have a 2000 Dodge Dakota and has a 3.9. It's giving a p 304 code. Runs really really rough. valves rattle and everything. put seafoam cleaner through it ran it down the road and has stopped. Had the


DTC P0304: Cylinder 4 misfire detected. Probable cause:
1. Check for latest control unit software update
2. Faulty PCM or ECM
3. Fuel injector(s) faulty
4. Ignition system fault. Check ignition module, coil, spark plugs, and wires
5. Fuel system

Dec 09, 2014 | Dodge Cars & Trucks

1 Answer

Knock sensor


is the code coming up as P0300 to 312? if so it is a misfire check plugs and wires. cap and rotor. then injectors with a noid light.

Aug 05, 2012 | 1992 Toyota Camry V6

1 Answer

2002 elantra cyl 2 random misfire


Hi there: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.

For example, a P0302 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #2; same condition in P0301 - cyl #1, P0303 - cyl #3 and P0304 - cyl #4.

A code P0300 (or 301, 302, 303 or 304) 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

About your 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.

Mar 09, 2012 | Hyundai Motor 2002 Elantra

1 Answer

I would like to know what does this codes means 300 302 303 304 305 and what to do to fix it. I have change the sparks and cables, the coils and the Orings of the ingectors. please help me


P0300 random/ multiple misfire detected
P0302 misfire cylinder #2
P0303 Misfire cylinder #3
P0304 Misfire cylinder #4
P0405 Misfire Cylinder #5

This is pretty common thing, and if you have already changed out the wires, coils, and and plugs then you maybe having trouble with the ECU. The good news is that there are local shops (not as expensive as dealerships) that can either flash or replace your ECU. If you don't have a local shop in your area that does this kind of work, then you will be stuck with the dealership.

Good luck,
--Zim--

Jun 02, 2011 | Toyota Corolla Cars & Trucks

4 Answers

Got a p0304 code come up on my 2002 olds Bravada, replaced camshaft and it still didnt fixed it?


P0304 Code - Cylinder #4 Misfire Detected
A P0304 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #4.

Symptoms may include:
* the engine may be harder to start
* the engine may stumble / stumble, and/or hesitate
* other symptoms may also be present

Causes: A code P0304 may mean that one or more of the following has happened:
* Faulty spark plug or wire
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector
* Burned exhaust valve
* Faulty catalytic converter(s)
* Running out of fuel
* Poor compression
* 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.


Hope helps.

Apr 09, 2011 | 2002 Oldsmobile Bravada

1 Answer

1997 altma codes p0304,p0325 thanks mike


p0304 misfire on cylinder #4
p0325 knock sensor circuit

Could be a bad wire, plug, or coil pack on cylinder #4 (or bad distributor connection).

Knock sensor indicates a knock coming from the engine, perhaps from cylinder #4.

This may lead to a diagnosis if you change parts related to cylinder #4.

Good luck.

Jul 06, 2010 | 1997 Nissan.5 Altima

3 Answers

My S-10 keeps giving a P0300 dtc. Can't figure out what is setting this code. Usually misfires at idle. Any suggestions?


if u change plug wires ,coils ,plugs and still having problems check the injecter with a pulse light the one that dont pulse the pcm is bad are broke wire if all of them are pulseing then change the injecter.had the same problem on a 2000 s10 2.2

Apr 27, 2010 | 2000 Chevrolet S-10

1 Answer

Getting a code P0304 on my 1999 Dodge 1500 5.2L.I changed my spark plugs, wires, cap and rotor about 3-4 mos. ago and have had my check engine lite come on three different times and stay on for 3-4 days at...


the code that is given means that the coil, plug ,plug wires, for that cylinder could be bad, check spark plug and see if this is the problem or a bad wire.

Nov 14, 2009 | Dodge Pickup Cars & Trucks

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