Backfire after 6,000RPM

[Emilian]

I am currently having some issues with my 1J. After 6,000RPM it starts to backfire like crazy... Anyone has any idea what I could do or change. I'm currently running 20psi on a single turbo set-up.

• 2 coils have a few cracks in them, but they are all wrapped with electrical tape.
• Ignitor is fine.
• Wiring is all good.
• Running a set of NGK Iridium IX - Spark Plugs (BKR6EIX-11) - Gaped to .022

Any suggestions?

 

[NashMan]

I would run coppers only my self not a fan of really any thing els

try it there cheep any way

 

[IBoughtASupra]

Standalone or stock ECU?

 

[Emilian]

Standalone or stock ECU?

Haltech Platinum Sport 2000

I would run coppers only my self not a fan of really any thing els

try it there cheep any way

Which ones would you suggest?

 

[NashMan]

ngk in 7 heat range be your best bet

 

[Emilian]

Okay, I'll give that a shot.

 

[hvyman]

Should epoxy and heat shrink the coils.

 

[Emilian]

What gap would you guys suggest?

 

[hvyman]

I gapped mine to .025 ngk coppers pn 4644.

 

[seoul4korea]

Should epoxy and heat shrink the coils.

Agreed, elect tape is kind of getto lol. +1 for coppers as well.

 

[NashMan]

I just get new coil's once they crack they detra and don't give off the voltage that they once did


remember the coil is copper wound around an iron core

 

[Emilian]

Would the NGK 5553 (BKR6ES-11) work?

 

[hvyman]

I just get new coil's once they crack they detra and don't give off the voltage that they once did


remember the coil is copper wound around an iron core

This is jz section. Jz coils crack at the bottom of the plastic down by the plugs.

 

[NashMan]

Would the NGK 5553 (BKR6ES-11) work?

still a 6 heat range 7 is better they do make them

and you can get an 8 if you get a none Jis plug and go for an Iso it tad shorter but it does work

but an 7 will be good to go plug

 

[seoul4korea]

NGK V-power BKR7E Stock NO. 4644