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i seem to have the same issue. mods are fmic, full exhaust, Mines ECU, Bee*R panel filter, high flowed turbo and ebc. run it streeter at 14psi no worries. run it at wsid at 14 i get the same issue as shayne. wind down to 12psi ran good, back up to 14psi then shit, then back to 12 it was still shit...duno wtf is going on...get new coils? injectors?..

Are you running the stock fuel pump....?

Sounds like a fuel delivery problem....

How does it cut out.........

Does she miss-fire and become all jerky or is it just like she slows down ?

Miss-firing etc..is coils,spark gap, timing and afm related.

If she just slows ....it is fuel and boost leak related.

Hope this helps.

hi i am able to rev to 8500-9000 on 7 lbs of boost any more and it is like the rev limiter is coming on at 6000,i have tried timing, no good. :cheers:

Hi mate - does it sound a bit like a rally car? Sort of brup brup brup brup really fast? If so, it's your spark breaking down, get new plugs and gap to 0.8 and tape/epoxy your coil packs (instructions in general maintenance forum). If that doesn't fix it, you might need to go for split fire coils.

As also mentioned, if it is more like a total cut out it could be fuel delivery. Are you running the standard pump?

Also, you shouldn't really be reving the engine to 8500, that's too high for the stock motor unless it has been re-built and balanced for high revs.

Edited by Ionos
Hi mate - does it sound a bit like a rally car? Sort of brup brup brup brup really fast? If so, it's your spark breaking down, get new plugs and gap to 0.8 and tape/epoxy your coil packs (instructions in general maintenance forum). If that doesn't fix it, you might need to go for split fire coils.

As also mentioned, if it is more like a total cut out it could be fuel delivery. Are you running the standard pump?

Also, you shouldn't really be reving the engine to 8500, that's too high for the stock motor unless it has been re-built and balanced for high revs.

no im running a bosch 500hp full pump

and i have hks cams and eng is a2.7ltr stroker!!! :)

  • 3 weeks later...
If you have the mods to handle 8500-9000rpm get the car on a dyno as you wouldn't want to break the thing.

Chances are coils are buggered.

or if its still an rb25det head the valves are floating. :)

it is a gtr head,i have gapped the plugs, nail polished the coil packs and still no good, i will keep trying

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