Question about 1998 Audi A4

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A4 Quattro,misfire detected cyl4.

P0304 Code Appears.Ignition leads/bad plug in cyl4/or possibly the coil pack.???

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Jeremy Dellow

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Coil packs are relatively common failures on the B5 A4, although it's usually on the four-cylinder turbo. Swap the coil pack with another one on the bracket, clear the code, and then run the car and scan for codes. If the code doesn't change, then the problem is plug or wire. If it follows to a new cylinder driven by the same coil that is currently failing at cylinder four, then it's the coil pack.

Posted on Aug 15, 2008

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Have codes P0304 & P1314, jaguar, 2002, 2.5L. Sputters going up steep grade and dies out to idle, must repeat until over grade. Otherwise runs great with power & acceleration


For Shop Owners AutoCodes OBDII Code List P0304 JAGUAR P0304 JAGUAR - Cylinder 4 Misfire Detected 0 Comments ' Add Comment Possible causes Faulty spark plug 4 Clogged or faulty fuel injector 4 Faulty ignition coil 4 Fuel injector 4 harness is open or shorted Fuel injector 4 circuit poor electrical connection Ignition coil 4 harness is open or shorted Ignition coil 4 circuit poor electrical connection Insufficient cylinder 4 compression Incorrect fuel pressure Intake air leak

Read more: https://www.autocodes.com/p0304_jaguar.html

The code p1314 means that the catalytic converter is under a lot of stress and is burning too hot

P1314 JAGUAR - Misfire Rate Catalyst Damage Fault Bank 2 0 Comments ' Add Comment Possible causes Cylinder compression low Low fuel pressure Clogged fuel injectors Faulty / worn out spark plugs Faulty ignition coil Faulty fuel injectors Faulty Engine Control Module (ECM)

Read more: https://www.autocodes.com/p1314_jaguar.html

Mar 31, 2018 | Cars & Trucks

1 Answer

I have a Saab with a service code P0304 I looked into it usually bad ignition coil...I replaced the coil but No go, any ideas?


P0304 code means - Cylinder 4 Misfire detected.

Possible causes are:

- Faulty spark plug 4
- Clogged or faulty fuel injector 4
- Faulty ignition coil 4
- Fuel injector 4 harness is open or shorted
- Fuel injector 4 circuit poor electrical connection
- Ignition coil 4 harness is open or shorted
- Ignition coil 4 circuit poor electrical connection
- Insufficient cylinder 4 compression
- Incorrect fuel pressure
- Intake air leak

Jul 24, 2015 | Saab Cars & Trucks

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

2 Answers

How to fix diagnostic code for 1999 vw passat po304 po305 po306


Hi. You have misfires on cylinders 4, 5 and 6. If there are no faults on cylinder 1, 2 and 3 then I would check the power to the left bank injectors. Also check spark plugs and ht leads. If there are running issues then this should be an easy fix. If the faults are very intermitant then it can be a bit tricky to isolate.

May 18, 2014 | 1999 Volkswagen Passat

1 Answer

Misfire code p0304


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.

Oct 14, 2012 | 2008 Ford Expedition

1 Answer

P0304


Hi there:
DTC 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

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 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 23, 2012 | 2002 Mercedes-Benz C-Class

2 Answers

Why does p0304 appear when engine warms up on 2002 c240


Seems to be a misfire code, you could have a partially clogged injector. You can have them tested at a local car shop.

Feb 09, 2012 | 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

3 Answers

Is p0304 code basically a tune up?


P0304 stands for #3 cylender is misfireing.
Cuases can be.
1. Bad spark plud wirers
2.badspark plug
3.vacuum leak
4. a leaking intake manifold
5.headgasket leak
6. bad cylender rings
7.bad coil
hope this helps give feedback Fixya

Feb 06, 2011 | Ford Taurus Cars & Trucks

1 Answer

I have 97 cavalier with 148,000 miles 2.4l dohc went to do my smog check n show has a code po304 cylender 4 is misfire the guys did a compression test on the cylender showed 65 psi only. the car had new...


P0304 Code - Cylinder #4 Misfire Technical Description Cylinder #4 Misfire Detected
What does that mean? 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.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebookcopyscape.gif SymptomsSymptoms 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
.

Feb 01, 2010 | 1997 Chevrolet Cavalier

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