Misfire Cylinder 3. Lost of power

[SupraTT]

Mods
Intake
Charge pipe
Downpipe
Jb4: removed after

anyone know what could cause this?

im removing parts one by one. Jb4 then intake then downpipe to see if its one of those unless someone can point me in the right direction

changing the plug on cylinder 3 today

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[Branflakes123]

Could try swapping the cylinder 3 coil pack with one of the other ones. See if the code moves to whatever cylinder you swap it to

 

[SupraTT]

Hi yes i did that and it still flags cylinder 3 which is why im changing the plug next

 

[MYA90SUPRA]

When you are changing the plug check compression while you are in there. If its good and code stays probably injector.

 

[SupraTT]

Can i just replace the one?

 

[MYA90SUPRA]

Can i just replace the one?

Yes you can. Just keep in mind that the injector needs coded to the dme.

 

[zrk]

Yes you can. Just keep in mind that the injector needs coded to the dme.

No it doesn't. You can swap DI injectors all day.

It's either the injector or the plug since you ruled out the coil. You're clearing the codes in diag mode each time, and it comes back right?

 

[SupraTT]

So i just swapped out the plug. It looked fine. I also put in a tomei exhaust and it’s running fine right now. Revved it a bit and no flutter or lost of power.
Hoping it is fixed. Either a bad plug or the stock exhaust was too restrictive with the catless downpipe??

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