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#1
03-08-2010, 12:24 PM
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car doesnt move fast on take off
well i got a 83 300d that has started to not have any take off. when it gets to about 3k it kinda moves. thats about when the turbo starts to spool up. both fuel filters have been changed,cleaned the aldl line and bango fitting but still that didnt help. im gonna try to adjust the valves. the car has 440k miles on it. the trans seams to shift through the gears really fast, all stacked shifts. the acceleration problem seamed to happen really quick. it wasnt a real progression to where it is. any ideas out there??
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 93 300d-turbo 85 300d(svo)320k 83 300d 440k 84 300d(roommates)260k 83 300td(svo)250k 87 isuzu pup(diesel)svo 320k 96 nissan 240sx(turbo) 08 suzuki m50 95 e350 prowerstroke boxtruck 
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#2
03-08-2010, 12:32 PM
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Check the turbo switchover valve and it's rubber connectors. It sounds like the ALDA is not getting the boost signal for additional fueling.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#3
03-08-2010, 12:43 PM
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If you are saying you think it is shifting through the gears too fast then check to see if your trans is affected by vacuum... some are, some not... does yours have a vacuum modulator ?
Do adjust the valves to spec before the other tests... that baseline needs to be ok anyway...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html
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#4
03-08-2010, 12:47 PM
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Quote:
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83 SD 84 CD
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#5
03-08-2010, 12:48 PM
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... sounds like a classic B2 piston problem to me.
catch it quick, and you may not need a new transmission... It looks like I waited too long...
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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 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#6
03-09-2010, 08:03 AM
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Mine doesn't move fast in initial takeoff either. It's quite slow.
But when the temperature gets between 40 and 60C, it's like a switch turns on and I have gobs of power. I believe it's the switchover valve and the ALDA isn't getting the signal to provide more fuel.
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Michael LaFleur '05 E320 CDI - 86,000 miles '86 300SDL - 360,000 miles '85 300SD - 150,000 miles (sold) '89 190D - 120,000 miles (sold) '85 300SD - 317,000 miles (sold) '98 ML320 - 270,000 miles (sold) '75 300D - 170,000 miles (sold) '83 Harley Davidson FLTC (Broken again) :-( '61 Plymouth Valiant - 60k mikes 2004 Papillon (Oliver) 2005 Tzitzu (Griffon) 2009 Welsh Corgi (Buba) 
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#7
03-11-2010, 11:11 AM
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b2 piston problem, whats that?
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93 300d-turbo 85 300d(svo)320k 83 300d 440k 84 300d(roommates)260k 83 300td(svo)250k 87 isuzu pup(diesel)svo 320k 96 nissan 240sx(turbo) 08 suzuki m50 95 e350 prowerstroke boxtruck
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#8
03-11-2010, 11:14 AM
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the switch over valve is the banjo bolt on the back of the intake? iv cleaned that and the aldl line
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93 300d-turbo 85 300d(svo)320k 83 300d 440k 84 300d(roommates)260k 83 300td(svo)250k 87 isuzu pup(diesel)svo 320k 96 nissan 240sx(turbo) 08 suzuki m50 95 e350 prowerstroke boxtruck
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#9
03-11-2010, 11:17 AM
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b2 piston is the part of the transmission that engages first gear.
if it's bad, you will have high RPM's and little or no movement forward until the friction pushes the car up to enough speed for 2nd gear to engage.
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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 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#10
03-11-2010, 12:51 PM
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Is your linkage hitting max stop on the back of the IP?
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42
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#11
03-11-2010, 01:40 PM
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If one has a bad B2 piston, would that cause no creeping at idle, while the tranny is in D, S, or L?
On my car, you can feel the turbo boost effect in first gear. The slowest take off occurs when the A/C compressor is engaged, but once rhe RPM hits 2000+ all is good.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#12
03-11-2010, 01:47 PM
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on mine, the weak and dead B2 makes it feel like it's in neutral at idle, and there is slight movement forward when you rev the motor.
after I changed the kit in, putting the shifter from N to D there is a noticable CLUNK as it pulls into gear. my case was pretty badly worn from the metal sleeve of the original B2, and sometimes it will not go into 1st from R or N... I have to either rev it to get moving, or wait for it to clunk into gear. Whunter says I need a new case, if I can find no leaks around the B2 cover...
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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 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#13
03-11-2010, 01:54 PM
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That makes sense, and good thing to check along with the other items when slow take off is noted.
__________________
RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#14
03-12-2010, 10:22 PM
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hey well i dont think that i have the b2 problem. it def goes right into gear. jus takes off really slow. its more of an engine power thing. still have to do the valves. its on the benz i gave my bad so its a hour away.
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93 300d-turbo 85 300d(svo)320k 83 300d 440k 84 300d(roommates)260k 83 300td(svo)250k 87 isuzu pup(diesel)svo 320k 96 nissan 240sx(turbo) 08 suzuki m50 95 e350 prowerstroke boxtruck
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#15
03-12-2010, 10:25 PM
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ahh, ok. that's good. do you have someone who can step on the accelerator while you look at the linkage on the IP and verify that full travel is achieved?
that is another thing I had wrong with my SD, fixing that trippled the acceleration of my car.
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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 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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