Please help!

[Djmontiel]

Okay so I just pulled the codes and they are P0303- Cylinder 3 Misfire Detected and P0316- Misfire Detected on Startup

 

[Ford ST]

I would try switching around the ignition coil, and see if the misfire moves to a different cylinder if it does it's a bad coil.

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[Djmontiel]

Tried that same thing

 

[Ford ST]

I would pull the wiring harness off each coil pack when it's running, and note the drop. If cylinder 3 doesn't make a difference we can say that it's officially a dead cylinder. The injector for cylinder 3 could be dead. You could have a mechanical issue which could be tested with a compression check. I would also look at all the plugs. I'm leaning more towards a fuel issue/ fuel injector. That sound is similar to a diesel engine with a bad injector, and they use direct injection.

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[Djmontiel]

I'm going to change the oil to 0w-40. At the same time I'll see if there's metal bits in the oil. After starting up again and revving up a bit I heard what sounded likea marble banging around in there but only for a couple seconds then the sound goes back to the consistent clicking

 

[Djmontiel]

The other spark plugs looks normal and the one from cylinder three is completely black covered in soot.

 

[Ford ST]

The other spark plugs looks normal and the one from cylinder three is completely black covered in soot.

I believe you have a bad injector on that cylinder. Hopefully somebody else has had a similar problem and can confirm this. Build up on a spark plug is normally caused by Fuel issues.

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[JDG]

What happened when you moved a functioning coil pack to cylinder 3?

Post a photo of the spark plug. I’m wondering if it is oil being burnt or excess fuel.


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[Djmontiel]

No change with a change of coil pack

 

[M-Sport fan]

It also sounds like it can be the HPFP trigger cam tappet gone bad, maybe.

http://www.fiestastforum.com/forum/...esta-ST-you-may-need-a-Cam-Bucket-replacement

 

[Djmontiel]

Alright everyone. I've changed the oil to a heavier weight to see if that made any difference(due for a change anyways) and no result. Then I pulled out all the spark plugs and the contact point for cylinder #2 was broken off. So at this point I'm assuming that it shot down and either disintegrated or did some damage to the Piston or valves. Tomorrow I will be doing a compression test and then go from there. I'm attaching a photo of the spark plugs.

 

[TyphoonFiST]

What do you mean by contact point? Pics please...what you are saying could be completely different nomenclature to what it actually is...

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[M-Sport fan]

^^^I'm gonna guess the ground electrode.

 

[Djmontiel]

 

[Ford ST]

Well that's going to cause a misfire. I have to ask what type of fuel are you using? If damage was done it's already been done. Put brand new plugs in it, and give it a shot.

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[M-Sport fan]

That is NOT good, since unlike in an NA car's engine, where that would just end up in the catcon, or down pipe, IF that ground electrode went out the exhaust port, it ended up in the turbine blades.

(But the only good news is that IF it somehow got ejected VERY QUICKLY out of the turbine's exhaust outlet, it may not have damaged the blades, or not much.)

 

[Djmontiel]

I use 91 octane as it is the highest grade fuel you can get in California. I went and put in new plugs right away and still the same thing was happening. Are you sure that it will pass through the turbo? Wouldn't it just make it's way out the exhaust?

 

[Ford ST]

Well let us know how that compression test goes.

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[Djmontiel]

Will do. What do you think for right now? I'm assuming that that piece of metal did some damage in there

 

[M-Sport fan]

Can you tell WHERE the current, after the plug change, noise you are hearing is actually originating from? (near the head, or down by the turbo??)