Hi everyone

I'm new to the forum, never posted before. I have gotten a lot of great info though, so thanks for that. I do have a problem that I am going to throw out there in hopes i can get a few answers.
I have a 2004 X-type with the 2.5 motor. It poped a check engine light some time ago and i had it scanned at the local auto parts store. It came up as a miss fire on the 2 4 6 cylinders. I have noticed no issues other wise. There is no skipping, sputtering, hesitation, lack of power or trouble idling.
I tried pulling the negative battery cable in hopes of resetting it and it staying off. However it did nothing. I'm embarrassed to say that its all I did however because it didn't really affect the way it drove. I put a TON of miles on and regular maintenance is done regularly and premium fuel is always used.
Its inspection is coming up and this needs to be taken care of. I'm pretty mechanically inclined and would like to take care of this myself. all the research i have done has come back empty.
So please help if you can.

Thanks in advance.

 

What were the DTCs stored in the system when it was scanned?

How many kilometres/miles are on the vehicle?

 

I'm sorry I never wrote down the code. I'm going to scan it again an I will let you know. It had 140000k on it.

 

I'm sorry I never wrote down the code. I'm going to scan it again an I will let you know. It had 140000k on it.

 

BigP, please keep in mind that the cylinders in question are the ones nearest the radiator. So, this is actually fairly good because these are the easiest to get to. I would say to first start with pulling the #2 coil (behind the passenger headlight, just to the left side of the airbox). See what the plug well looks like. Is there oil in there? If so, then odds are that is the source of your problem and most likely you are going to need a new valve cover gasket. If the plug well is dry, then I would pull the plug and see what it looks like. Look at this chart (https://s.yimg.com/fz/api/res/1.2/UE...ug+Reading.jpg), see what your plug look like compared to this. That may help us narrow down whether you are having a spark issue or a fuel issue.

The other thing that I would tell you to look at since you live in the salt belt is to look a little further to the left of your #2 coil. You should see where all of the coils ground themselves to the block. You will want to remove those terminals (should be 6 of them as I recall) and clean them back up and get them back to a nice shiny silver color. Then you can reattach them to the engine block (don't forget to clean the surface on the block too). It can be possibly something as simple as a rusty lug.

 

Thanks for the help so far. The codes are P0306, P1316, P0430, P0300, P0302, P0304, P0305, P1111.

 

BIgP, just to ask a silly question, when you have a misfire issue, is it wet outside or you have recently driven over wet roads? If so, you may have a few coil packs that are starting to go. I have seen in the past where the coil packs will be fine when it is dry, but you subject them to moisture, they will start to fail.

 

The whole problem with this is that I don't notice any misfire or problems running at all.

 

BigP, This is what makes troubleshooting a problem like this so difficult. You may find that having someone with a live data logger that you can plug into the OBD port is going to be your best friend. That way, you can see what the motor is saying and seeing and that might give you an idea of what is your problem.