The Mercedes suddenly was down on power starting early June; not sure exactly as a lot on my mind. Finally got the boost gauge installed about a week ago and only producing a couple pounds unless I really load it for a couple minutes then might hit 8 p.s.i.. So decided to try without the A.L.D.A. the only difference is spooling a tad faster and on the freeway sits at about 4 p.s.i..

So the question is what is going on?

If the turbo charger was bad, wouldn't it produce no boost? Why would it drop? Do they need to be continually adjusted?

Thank you so very much in advance!

__________________
Current fleet:

1985 Mercedes-Benz 280TE - Waiting for heart surgery.

1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home.

1979 Mercedes-Benz 300TD - Parted out.

1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration.

1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration.

1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health.

Fuel filters

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

There is nothing to adjust on a turbo except for the waste gate.
A Turbo either works or it doen`t.

Have you checked the boost line from the rear of the Intake manifold to the Switch Over valve and then to the ALDA?


Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

As noted above, change the fuel filters first, as well as the tank screen if your feeling ambitious. Once your satisfied that the fuel system is working correctly you can adjust the wastgate to get your boost back. The springs grow weaker over time and they loose boost.

__________________
2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

Thank you all for the replies!

I tried the filters, remember? Both were changed an no improvement.

I adjusted the turbo charger not more than a year ago to about 14 p.s.i.. So time to do it again?

As for the tank screen I am willing but the 46mm wrench is at home.

I think I know, how does fuel limit boost pressure?

__________________
Current fleet:

1985 Mercedes-Benz 280TE - Waiting for heart surgery.

1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home.

1979 Mercedes-Benz 300TD - Parted out.

1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration.

1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration.

1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health.

Before changing the strainer in the tank try some biocide first. It will kill the bacteria and it should come right through the strainer and filters afterward.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Thank you so very much for the help!

Is bacteria like black grit? I had that in the pre filter.

I have some biocide, but forgot to bring it... Will see about getting some today.

__________________
Current fleet:

1985 Mercedes-Benz 280TE - Waiting for heart surgery.

1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home.

1979 Mercedes-Benz 300TD - Parted out.

1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration.

1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration.

1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health.

Bought the bioside, and man is it expensive! It is 16 treatments at most. I put in double as didn't have a measuring tool and wanted to be sure the test results were accurate.

Need to use all 10 gallons, right?

__________________
Current fleet:

1985 Mercedes-Benz 280TE - Waiting for heart surgery.

1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home.

1979 Mercedes-Benz 300TD - Parted out.

1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration.

1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration.

1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health.

That sounds like a lot of biocide. Which brand are you using? I remember using only 8oz of startron before.

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'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

... you bought 10 GALLONS of biobor? that's BUCKETS of it... it's most often sold in a 16oz container...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

16 ounces of Bio something, don't think Biobor. White bottle with clear measuring side. Very strong smelling. I put it in the emergency supplies.

__________________
Current fleet:

1985 Mercedes-Benz 280TE - Waiting for heart surgery.

1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home.

1979 Mercedes-Benz 300TD - Parted out.

1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration.

1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration.

1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health.

Wasting time with biocide...I think your problem is on the exhaust side. Try disconnecting the exhaust and see if you get your mojo back. If that doesn't work, check to see if your wastegate is open. If that doesn't work, pull off the intake hose and check if the turbine spins easily: it could be clogged with carbon.

Thank you so very much!

Could this explain better performance once the engine has run at least a half hour?

__________________
Current fleet:

1985 Mercedes-Benz 280TE - Waiting for heart surgery.

1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home.

1979 Mercedes-Benz 300TD - Parted out.

1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration.

1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration.

1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health.

How many miles ago did you change your fuel filter?

They can still be clogged, even with a "recent" fuel filter change. I've gotten a bad load of fuel and completely clogged new filters in way less than 100 miles. Took three filter changes before I ran all the junk out of my tank. Spendiest tank of fuel I ever bought, and will never go to that station again.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

Is your fuel tank vent plugged?