hello to the diesel lords,

just had my oil changed, i do it every 3-4 months, but this time i 've added 1 can of stp diesel oil treatment to 8 liters of castrol crd multigrade oil that i regularly use, what i've noticed is that i've lost some "pull" even though i'm already in second gear, i'm also suspecting a sticking parking brakes, rear or front b'coz sometimes i hear a "thud" when i step on the brakes any help will do guys b'coz a someone mentioned in this forum "my ride is getting dangerously slow"

thanks,

joseph c.
April 1984'300TDT

Joseph:

STP oil treatment will do nothing besides raise the oil pressure. Skip it.

I suspect your lack of power has more to do with a leaking boost signal line. Trace the white plastic line from the rear of the intake manifold to the ALDA on the injection pump. Check all the rubber hoses for condition -- they must be flexible and not sticky, and the little clamps must be good.

Also, check that the overboost switchover valve isn't leaking (disconnect the boost control line at the manifold and blow down it -- if you hear air escaping from the switchover, replace it). The banjo bolt at the manifold gets plugged, too.

Finally, if the boost control system appears to be working, do you get some black smoke out the tailpipe at full throttle? If not, you probably need to adjust the ALDA. Do a search, there are several good threads.

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!

Joseph..........,

Did you change the oil yourself or get it done by the quickie oil change master mechanics?

Check all the vacuum and other lines in the area of the oil filter, especially the lines to and from the overboost sensor, manifold and ALDA. One of these lines may have been disconnected when changing the oil filter.

P E H