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What would cause the 6 cylinder to misfire in a 3l That is in a 1998 caravan?


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2007-12-30 04:57:29
2007-12-30 04:57:29

I just changed my plugs and wires today. The Service Engine Soon light is off. I am not a mechanic and honestly, I don't think you have to be one. It is not complicated, but it is difficult. I did go ahead and change my ignition rotor and distributor cap. I am glad I gave this a shot, but I probably wouldn't try it again. It is now vibrating quite a bit and I need to figure this one out. I hope this helps you...


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It means that more than one cylinder has a misfire history. PO301 would be cylinder number 1 misfire. PO302 would be number 3 cylinder misfire.

If you have a "check engine" light on, start with having the codes read. A misfire code can tell you which cylinder or cylinders are having problems. A misfire could be the cause of your engine vibration.

it will feel like a misfire but should not cause a single cylinder misfire code. a bad maf ( mass air flow ) would and can set random multiple misfire codes, lean bank 1 and 2 just like a clogged fuel filter or restricted exhaust ( cat )

sounds like a cylinder misfire..check spark plugs and wires..usually a code will show which cylinder it is, should replace all though

Bad plug? Bad wire? Bad piston or valve (do a compression test)

Most likely a bad coil (each cylinder has one) located at the top of each spark plug

Most likely a bad ignition oil. Each cylinder has its own coil mounted at the top of the spark plug

P0303 is cylinder #3 misfire. P0300 would be random misfire. Either way you need to diagnose the case of a misfire. Check spark plugs, plug wires(if equipped), cylinder compression, fuel inectors, and wiring.

I talked to mechanic and he fixed 5th cylinder misfire on Dodge engine by changing chank shaft postition sensor. It came out on code reader though.

Usually a bad coil , or plug. if the injector was bad , the computer would have coded for it. But the cylinder 3 coil and plug arent that easy to get to. Its the one at the fire wall

That would be that there isn't enough gas getting to them

it would be nice to know which engine we are talking about but generally no would be the answer ----most are not adjustable and those that are would most likely be destroyed by the rotating component

It could just be a bad spark plug wire or the spark plugs need changing.

Trouble code P0300 means: Multiple Cylinder Misfire Trouble code P0302 means: Cylinder 2 Misfire Detected Trouble code P0303 means: Cylinder 3 Misfire Detected I would change plugs and wires

usually a misfire is either the spark plug or coil pack for that cyl. first I would change plug then change coil pack Take to dealer is still under waranty? Try replacing spark plugs.

Spark plug, plug wire, distributor cap, injector, internal engine in a blown head gasket.

There are several things that can cause your 2003 or Expedition to misfire. The most common cause is a plugged catalytic converter.

If your plugs, wires, cap, rotor and a compression test check out okay I would suspect the #3 fuel injector.

I'm not a mechanic / technician but it might be the spark plug , spark plug wire , not the proper air / fuel mixture to that engine cylinder , and there are probably other causes

Worn, faulty or dirty spark plug; cracked or worn spark plug wiring or loose connection.

If the check engine light is flashing at 1 second intervals , an engine cylinder misfire has been detected

I would make sure power is getting to the fuel injector use a noid light to test it. You may also want to check the fuel pressure also the intake manifold may have a leak that can cause a misfire as well. Glad your compression is good. That is a sure sign its something simple.

That would be an engine cylinder misfire , but either more than one or it can't determine which engine cylinder is misfiring

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