Sorry, been out a while.

Yes im guessing its got to do with ur:

1. ETA or
2. your wiring ETA itself
3. Engine wiring

can you give me a code number and ill try looking it up on all data.

So, here an update. I've decided to hook up fuel pressure gauges to the fuel rail and see what pressure its operating on. It turned out to be

Closed Throttle with Vacuum 3.2 - 3.6 bar Closed Throttle without Vacuum 3.7 - 4.2 bar
3.2bar (46psi) - 3.6bar (52psi)
3.7bar (53psi) - 4.2bar (60psi)

My pressure was at 53-54psi at idle with vacuum line hooked up from the regulator to the engine intake manifold. when i detached the vacuum line the pressure jumped to 60-61 psi.

So then i took hand held vacuum pump and put like 20 inches of vacuum on the regulator and it went to ~52-53 psi.

What do you guys think? Restriction in the line? bad FPR?

P.S. Plus my fuel pump started leaking out of nowhere... wtf?

__________________
1987 Mercedes Benz 300D Turbo Black/Black