My mates evo 8 has recently started having problems when it comes to his turbo.

The car is now making less boost than normal. The turbo still spools like usual but the boost kicks in is delayed a couple of thousand rpm.
The only mods are
- Full exhaust from the dump pipe
- K&N typhoon intake
- Turbosmart bov

I was thinking it might have something to do with the ecu because it hasn't be retuned sinced the mods have been installed.

Does anyone know what the problem could be?

check the wastegate actuator isnt stuck open.

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ah ok well i will have a look 2morrow with him and check the waste gate

Could be anything mate. Take it to a workshop. It won't be the ecu.

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+1 for not being ecu.

bring it around tomorrow.

I will try chee

rang up a workshop after checking the waste gate and it was closed.
The particular workshop said it could be a loose intercooler hose but after a quick inspection all the piping seemed to be in check.

Any other ideas people?

faulty boost soleniod, have seen a few 8;s with this problem.