2j high rpm breakup

[jdmfreak]

Hey guys, I've been fighting a under load high rpm breakup in my vvti 2jzgte ever since I dropped in the engine happens about 5k rpm and whatever boost that happens to be, I am running megasquirt, ls2 coils cop with ngk bkr7 plugs, I've also got a walbro 400lph fuel pump, - 8 fuel line to the rail, ID 1000 CC top feed injectors with the dm top feed injector rail, I've been fighting this for a couple weeks now and I've been focusing on the ms as the issue, but now I am fairly convinced it is something else, but everything I look at looks good any suggestions would be appreciated

 

[hvyman]

What's your plug gap?

 

[jdmfreak]

It was at.030 I dropped it to .025 with no change



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[jdmfreak]

This was when they were at .030



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[hvyman]

Has it been wired for sequential?

 

[jdmfreak]

Yes, it is sequential but setting it to wasted cop doesn't change the breakup

 

[hvyman]

Do you have the proper dwell times for the coils? Iirc there pretty picky but could be wrong.

 

[jdmfreak]

Dwell is 3.0 They are picky but same coils and dwell as my 7m which ran great, but I've also tried 1, 2.5, and 3.7 with no change

 

[hvyman]

Which cam sensor are you using

 

[jdmfreak]

The only one vvti has only one cam sensor
The vvti uses a 36-2 crank wheel and a 3 tooth cam wheel

 

[87supramario]

What do you have your rev limiter set up to?
Check the coils for any cracks?
Do you running a fuel pressure regulator?
Any codes pop up on the laptop?

 

[jdmfreak]

7200rpm, no cracks i can find, yes my fpr and tried a buddies with no change, no codes


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[hvyman]

You can try flipping the wires at the Ecu for the can plug and then change it from falling to rising.

If the cam is already on rising then switch the wires and go to falling.

 

[jdmfreak]

Im on rising right now with a solid signal nodrift. If i switch to falling it jumps 10deg randomly


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