aLmk's Turbo FA5

[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:




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

[PetefromtheStreets]

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:




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?


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[aLmk]

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?


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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

[PetefromtheStreets]

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:




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

[monjarassi]

What's ur tuner suggest?

[aLmk]

What's ur tuner suggest?

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.

[vdubkilla]

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 .

[vdubkilla]

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

[aLmk]

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

[vdubkilla]

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

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