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I also get a p0304 and a p0316 code

I changed the plugs , wires,and coil pack

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Type: OBD PO304
OBD PO316

Posted on Nov 20, 2014

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3 Answers

P0303, P0316


You have a misfire on #3 for code p0303 & misfire for code p0316

Apr 20, 2011 | 2002 Ford Taurus

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

I have a 2003 Escape XLT that is misfiring with a code of p0316 and p 0306. What do i need to check or repair?


P0306 is cylinder 6 misfire..P0316 is misfire in the first 1000 revolutions. A proper tune up will probably take care of the code. This includes spark plugs. I have the Mercury Mariner equivelent engine and you will need to remove the upper intake plenum to replace the plugs. It is plastic so take extra care when removing and re installing. I did not have to use new gaskets. There is a "coil pack" on each spark plug so no wires to change. I would change the air and fuel filter also.

Jan 05, 2011 | Ford Escape Cars & Trucks

2 Answers

2004 Ford Escape with 3.0L V6. misfire with flashing "check engine" light. Codes retrieved are P0316 and P0304


P0316 = engine misfire
P0304 = #4 cyl
A very common problem is a bad COP or coil. They can be expensive ($75? at part store), so you could try switching the coil with another cylinder and see if the code changes location with the coil.
They are easy to replace. Unplug the connector. Remove the one screw (8mm?). Pull straight out.


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Nov 29, 2010 | 2004 Ford Escape

2 Answers

What can cause OBD Codes: P0302, P0304 and P0306


I have an 2002 Kia sedona the code p0304 means an 4 cylinder misfire and also the wiring and plugs.I noticed an while back that when I press the gas smoke will come from my tailpipe and now my van is hesitating to go and it stumbles and the check engine light is on,I have the same code p0304.

Apr 13, 2010 | 2003 Kia Sedona

2 Answers

P0302 #2 cylinder miss fire code. Replaced plugs and wires but at 40 mph runs very rough. Idles smoothly but not when put in gear.


I have a 1999 ford escort 2.0, its got a miss on cylinder 3 and 4. I changed the wires and the coil pack but its still missing. When scanned I get code p1506, p0303 and p0304

Jan 02, 2010 | 2000 Ford Windstar

2 Answers

What could be the cause of a p0304 code on my 2005 mazda mpv. the check engine light is blinking


Cylinder 4 is misfiring. Take it to a mechanic and have them take a look at it. Im guessing its the distributor, Spark plug, or spark plug wire on cylinder 4

Dec 09, 2009 | 2005 Mazda MPV

1 Answer

A4 Quattro,misfire detected cyl4.


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.

Aug 15, 2008 | 1998 Audi A4

1 Answer

Trouble codes


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.
Code P0316
i've heard of the 5.4l's with the "cop" set up devolping moisture under a coil. if it hasn't again that is most likely the problem. to prevent this you could remove each coil and apply dielectric grease to the tops of the plugs.

Aug 04, 2008 | 2004 Ford Ranger

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