well I had the little diagram on the front of the car but some numb- nuts pulled it off so I have nothing to go by, If anyone has a digital camera and an 82 300 turbo diesel I would give my eye teeth for those pic's, also where is the ALDA ? on the firewall or near the turbo charger?? thanks

Can't help much with the vacuum diagram right now, but the ALDA is on the injection pump.

There will be a pressure line to it from the intake manifold via a switchover valve (if turbocharged).

Brown plastic line with blue stripe line goes to the vacuum cutoff on the IP (where the stop lever is), brown line goes to the ignition switch. Green is climate control supply, yellow is locking system.

You should have a white vacuum line from the main pump line to the vaccuum control on the throttle linkage, a hose from there to the transmission or transmission via a blue switchover valve (looks line a car horn) on the fender if turbo. Turbo vaccuum/pressure system is more complicated than the na system.

Sorry I don't have pictures or a diagram!

What specific parts of the diagram do you need?

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

Okay thanks for the help on the hoses, now is it possible that the line that is supposed to be on the intake manifold is plugged into an intake near the vacum pump? because I looked at my ALDA and there is one clear plastic tube going to the IP and the other one is screwed in near the fuel filter. I might add that the car is a slug right now, no takeoff power and tops about 60 mph on level ground, on steep inclines it goes into 1st gear and crawls up the hills at about 28 mph, I found a few leaks in the fuel system and have fixed them and there is some improvment but not what this car is capable of any more sugestions?? ISOLATED IN MEXICO

The hose from the rear of the intake manifold goes to an "overboost sensor" which is to the left of the master brake cylinder. From the overboost sensor, the line goes to the ALDA.

I would suggest first replacing your fuel filters. If the ALDA isn't "sensing" boost pressure, you would have performance equal to that of a 300D non-turbo, and even those don't top out at 60mph...

Sounds more like algae or dirt in the fuel tank, plugging the fuel pickup screen.

Temporary fix is to blow back down the fuel line into the tank and check for bubbling in the tank. Warm temps, damp climate, for sure you got algae. Permanent fix is to clean the tank and use algicide in the fuel, make sure you don't get water sitting on the bottom of the tank.

Dirty fuel will plug the fuel filters. You can replace the little in-line filter with any fuel line filter that will fit, it doesn't have to be the clear one, although that is nice. If the clear filter is black inside, you have a dirty tank or a load of bad fuel -- get some new filters on the car and see what happens. No fuel will cause all sorts of trouble.

Also, check the fuel lines from the tank to the IP -- if you have cracks or tears, you can be sucking up air instead of fuel. You won't have starting problems in Mexico unless you are in the mountians, but will have performace problems!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

With the engine running, check the 2 connectors on the brake booster hose, these 2 connectors ultimately supply vacuum to all the devices run by vacuum except the brake booster itself. One is metered, one is unmetered. The metered one in particular is prone to getting plugged on the inside of the line by oily soot, much like hardening of the arteries works. A poke with a straightened out paper clip will often restore everything to working order. I assume the rest of the vacuum operated systems are working as designed, otherwise I would suspect a bad vacuum pump.
Gilly

__________________
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Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)

Hope this helps....

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That orifice #62 is the one I mentioned. Carefully pull the rubber connector of the plastic part on the brake booster line and make sure you feel some vacuum there with the engine running. If there is no vacuum, try pushing a thin wire, like the end of a paperclip, into the orifice and see if there is vacuum after that.
Gilly

__________________
Click here to see the items I have up for auction at EBay

Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)

Does the black vent tube (a in the diagram) just hang out on the inside of the firewall near the steering wheel, unattached to anything?

Yes -- it is routed inside to keep dirt out of the vac system. No connection, only there to let air in to bleed off vacuum.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!