Now that I have better understanding about my injectors, it's on to my next repair!

Since I've owned my 87 300d, the turbo has never produced boost. Here is a short list of what I have done so far to investigate why..

#1. I have tested the electro switch valve that operates between intake and alda, it works!

#2. I have bypassed the switch and direct to alda from manifold, nothing!

#3. All hoses connecting switch, alda, and manifold hose fitting are unclogged, open and clean.

#4. I have connected a pressure/vacuum guage between intake manifold and alda, no boost pressure is evident.

#5. I had suspected a frozzen waste gate in open position, but it is not frozzen.

#6. I have inspected the turbo fan for play and it is firm and spins easily by finger.

#7. While I had the head off last week, I looked it over and couldn't see anything amiss, but then I'm not knowledged about what I should be looking for!

#8. I did move the push-rod between vacuum pod and waste gate and it moved all the way, but with much spring resistance from the pod.

#9. I removed the only 1/2 in dia. rubber hose that is affixed and it was not clogged, cracked or broken.

#10. I disconnected and plugged all vacuum hoses from the tee, located front of engine, that went to the EGR, located front below air filter.

While I have adequate power to maneuver in traffic, and it climbs hills without dying too much, I generally have to give it all it has, near pedal to the floor to do so! I get better than 30 MPG on average.

I would like to understand what I can do to get it working, but at this stage, I need some advise.......


Steve...........................