aLmk's Turbo FA5

So after finishing my fuel return install I now have a misfire in cylinder 4 and eventually a misfire in cylinder 3. This morning I made sure the injector clips were seated properly and the coil packs as well, then I pulled the plugs for cylinder 3 and 4 and they looked rather black, more so than what I'm familiar with seeing, I swapped them and the problem stayed in cylinder 4, but then after idling maybe 20 seconds also appeared in cylinder 3 and my vsa light turned on :think:

Here are some pics of the plugs, best I could get my camera to focus up close:
http://i1134.photobucket.com/albums/...ps2nkmv29n.jpg
http://i1134.photobucket.com/albums/...psoy7nhyoc.jpg
http://i1134.photobucket.com/albums/...psiqk1yohh.jpg

Could this be because I haven't installed a vacuum line to the FPR yet?

Quote:

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Originally Posted by aLmk

So after finishing my fuel return install I now have a misfire in cylinder 4 and eventually a misfire in cylinder 3. This morning I made sure the injector clips were seated properly and the coil packs as well, then I pulled the plugs for cylinder 3 and 4 and they looked rather black, more so than what I'm familiar with seeing, I swapped them and the problem stayed in cylinder 4, but then after idling maybe 20 seconds also appeared in cylinder 3 and my vsa light turned on :think:

Here are some pics of the plugs, best I could get my camera to focus up close:
http://i1134.photobucket.com/albums/...ps2nkmv29n.jpg
http://i1134.photobucket.com/albums/...psoy7nhyoc.jpg
http://i1134.photobucket.com/albums/...psiqk1yohh.jpg

Could this be because I haven't installed a vacuum line to the FPR yet?

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Definitely get tht vacuum line on there but I can't say for sure that's why. I know the Vacuum line is to give you the 1:1 rising rate. Think an injector got clogged?


Sent from my stupid iPhone using Tapatalk

Quote:

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Originally Posted by PetefromtheStreets

Definitely get tht vacuum line on there but I can't say for sure that's why. I know the Vacuum line is to give you the 1:1 rising rate. Think an injector got clogged?


Sent from my stupid iPhone using Tapatalk

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Ya the vac line is used for that and for giving consistent pressure at idle, but you are supposed to set it with the vac line off, I don't see how that could cause a misfire though, I'm just idling, not driving around. As for one getting clogged I find it unlikely that that would happen all of a sudden, I have a brand new fuel filter in the tank, and the injectors were cleaned and flow tested like 2 years ago tops. IDK :shrug:

Quote:

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Originally Posted by aLmk

So after finishing my fuel return install I now have a misfire in cylinder 4 and eventually a misfire in cylinder 3. This morning I made sure the injector clips were seated properly and the coil packs as well, then I pulled the plugs for cylinder 3 and 4 and they looked rather black, more so than what I'm familiar with seeing, I swapped them and the problem stayed in cylinder 4, but then after idling maybe 20 seconds also appeared in cylinder 3 and my vsa light turned on :think:

Here are some pics of the plugs, best I could get my camera to focus up close:
http://i1134.photobucket.com/albums/...ps2nkmv29n.jpg
http://i1134.photobucket.com/albums/...psoy7nhyoc.jpg
http://i1134.photobucket.com/albums/...psiqk1yohh.jpg

Could this be because I haven't installed a vacuum line to the FPR yet?

---

Definitely get tht vacuum line on there but I can't say for sure that's why. I know the Vacuum line is to give you the 1:1 rising rate. Think an injector got clogged?


Sent from my stupid iPhone using Tapatalk

What's ur tuner suggest?

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Originally Posted by monjarassi

What's ur tuner suggest?

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That if I think it's a fake misfire he can disable that sensor/feature. But I don't think it's fake, the idle is rather rough.

Why don't you put a new set of plugs in it or just swap the plugs from 3/4 with cyls 1/2 and see if it follows the plugs or even swap coil packs .

I think I would also just go ahead and do a compression test since the plugs are out.

I have a feeling this is injector related somehow. I will try swapping those as well as swapping plugs and coil packs.

Quote:

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Originally Posted by aLmk

I have a feeling this is injector related somehow. I will try swapping those as well as swapping plugs and coil packs.

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Thats possible as well guess your gonna find out ! What the culprit is