Question about 2002 Mazda MPV

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Misfire in cylinder 3

I have a misfire in cylinder 3. What can I do to fix it?

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  • skbk718 Apr 06, 2009

    I have an cylinder 3 misfire code for my 07 Nissan Sentra...does anyone have any tips on that one?

  • adrianpatern Apr 22, 2009

    My 02 MPV started shaking in idle and at low speeds one month ago. Mechanic said a coil was "fried". The problem seemed fixed for about 2 weeks and then it started the same thing again... I'm wondering if I should trade it in before I start having additional problems.



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I recently had that (po303) misfire in cyl. 3 on my 2002 Mazda MPV LX with the 6cyl. 3.0 ford duratec engine (the only engine installed that year). 75k miles. The engine was studdering while at idle and upon accelleration. It was worse when the AC was on. The check engine light came on. I went to Advanced Auto Parts. They loaned me a code reading handheld computer. An Actron OBD II. PO303 misfire in cyl.3 was the verdict. I then got on the internet to do some research. Found that the problem could be a number of things. Coil packs and/or wiring harness, spark plugs, egr valve and/or ports, fuel pump or filter, fuel injectors etc. etc.. I decided to try what I thought was the simpilist remedy first. I purchased new spark plugs, retrieved some tools from the garage and opened the hood. Though I've performed all the other routine maintenance items like oil changes, battery maintenance, air filter etc., I never really looked for or noticed the spark plugs or their location. The front bank of 3 plugs was a breeze to change out but the rear bank....well they havn't been changed yet. Not so simple. At that point I decided that since I would have to remove the intake manifold and all the wires,hoses and etc. would have to be unattached, I might as well change the 3 coil packs and recondition the 6 fuel injectors while I had it apart. The cost and hassle of those fixes then lead me back to do what my old school, auto mechanic all his life father, alway told me. "Look at the easy fixes first". Many of us think that since everything nowadays is so complex that the fix must be complex also. Well, I then purchased a bottle of Chevron Techron Fuel Injector Cleaner. So many other brands were on the shelf to choose from. Seafoam, Lucas, Shell, CRC, STP, etc., etc.. Through netsurfing I discovered an old CARTALK Q & A. They kinda gave a halfhearted nod to the Chevron product. It stuck with me so I tried it. Within 10 miles the engine began to run better. The more I drove the better the performance. The Check engine light went off. No more misfire in cyl. 3 and no more code po303.

Posted on Dec 07, 2008

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Try gapping your plugs. Book says around .040, but proper gap on a MPV is .052-.055... That was my problem. New gap fixed it... after I replaced the wires, coil pack, checked for vacuum leaks, sea foam in tank.. etc.. etc... turns out it was just a stupid mis-print in the wally world book... new gap and all is good.

Posted on May 26, 2009


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SOURCE: numver 3 cylinder misfire 2001 sable

Yep, bad plug or wire.

Posted on Nov 28, 2008

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SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced

  1. P0171: This means that the oxygen sensor has detected a lean air-fuel ratio. This can be caused due to a vaccuum leak or a problem in the HO2S circuit or the HO2S (Heated Oxygen Sensor) itself. (Bank one Sensor one). This is commonly located along the exhaust pipe. It could also be a bad Mass Air Flow sensor or a bad Engine Coolant Temperature sensor. Diagnostic checks will be needed to be carried out to be verified though
  2. Well as for the other codes, it means #3&4 cylinders are misfiring. It is a possibility that the P0171 code mite have caused the others to show up. I can be wrong though. But it is a strong possibility. If the air fuel mixtue is too lean indeed, mis-firing will occur, unless it is an actual electronic and not a mechnical problem. By the way, when these codes appear, how is the engine's performance. Does it remain the same or behaves poorly?

Posted on Feb 14, 2009

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SOURCE: 2000 ford winstar sel update to problem

i had asimiliar misfire on my 2000 windstar.the first thing to check is a broken valve spring by taking off the valve cover the other is a o2 sensor bank 2 i believe is the downstream.if not the valve spring then either the coil pack or thecontrol module. either way it is fairly inexspensive

Posted on Mar 08, 2009

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SOURCE: cylinder three misfire?

coil pack, or plug or plug wire.

Posted on Jul 09, 2009

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SOURCE: Code says misfire in cylinder 3. How do I know

You will need to find the firing order of the engine you have to determine where Cylinder 3 is located.
Please read this link for more information

Posted on Jun 03, 2010

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