1997 A4 1.9 TDi AFN Quattro:
Car runs great and has normal power until 70-80mph then hits limp mode. I've cleaned out the turbo so no sticking VNT, swapped N75 and replaced all vacuum hoses and blanked off EGR.
After it hits limp mode I get '000575 Intake Manifold Pressure - 17-10- Control difference - Intermittent'
I measured block 011 in VCDS between 2500rpm and 4000rpm in 3rd gear and got this:
Shouldn't the Actual MAP follow the Specified and the duty cycle boost valve % increase with RPM?
Any help greatly appreciated!