93 - 2.0T - 2003 / Power Loss

Hi,

i am the owner of a 2003, 93 2L Turbo, with stage 1 E85, it's a manual.

I have been trying to put it back in shape, engine wise.

The car broke down twice due to ECU problems, i had it rebuilt in UK.

But sometimes, when i start the car, the cruise logo doesn't appear ( i always leave it on ) on the dashboard, and with that indication, i know that the first gear will be slow.. i have a big loss of power.

And when the logo appears after a few restarts, i regain my power..

Anyone knows where that comes from ?

Thank you.

Vas