Hi!
I would need som help whit my new Audi A4 1.8 Turbo Quattro -96.

I have changed the turbo to a Mitsubichi TD04-15t, but when i put the
pedal to the flor i lose the turbo pressure the i get some then i lose it
again. So it don't keep the pressure. It's all the time when i try to put
the pedal to the metal.

(It's onely the turbo pressure that dissepers the car keeps on acelrate but the turbo goes on and off every second)

It's not the lmm, ignition cords, fuelpump. Anyone know what the problem
can be?

Please help me...
Tanx...

best of regards
Jörgen

Sweden
(hope you understand my bad english)

 

might be a bad diverter valve

 

It could also be a bad wastegate. I am not familiar with this turbo. If you change your turbo, you will most likely need new programming and fuel mapping otherwise the turbo will not run correctly as the Engine control module can't understand what is going on and tires to compensate.

 

need an suitable remapping