hi everyone, i am stuck with an ongoing problem i have read loads of people have had simular problems. i have an audi A4 1996 turbo, its been re-maped and lowered, it has a brand new K03 turbo on it and its running manual boost. it works fine if i drive flat out from first gear. but if i try and drive normal and accelerate in gears it splutters and boost will hit its max at about 15psi hold it then make a pop noise drop down for about 2mins to 7'8psi then go back up, but only seems to do it in 2nd 3rd 4th and 5th gears not first. i took out the n75 but left it plugged in and it works every now and then. yesterday i tried to put it back in i heard a pop and now i think in as its called "limp mode"...... please can someone help me, i want it to run about 12psi max and hold it nicely with no problems and no spiking and splutters....

mike

 

I would start by turning your MBC down a touch and see if that helps. When running a manual boost controller on a small turbo like a K03, it can become a bit like an on/off switch. I experienced this a little bit with my current set up at 15psi and it got much better down in the 12-13psi range.

 

ive tried it as far down as it would go but it still seems to spike, it goes upto the 14/15psi mark and it holds before dropping down and then struggling, but if i drive flat out from 1st it works perfect through all grears... so strange, i will try manual boost down as low as possible now and see how it goes. thanks

 

I saw you said you've got your N75 plugged in still, did you loop a vac line on it like you were supposed to?

 

yeh ive looped it off, i have started all over again from fresh with manual boost as low as it will go, its now on about 7psi, im guna slowly turn it up see if it starts spiking again i send a pic of how mine looks let me know if it seems right? thanks for ur help mate