Injection Pump fuel adjustment for the MW and M pumps, engine tuning and maintenance - Page 2 - Mercedes Forum - Mercedes Benz Enthusiast Forums


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  #11  
Old 04-03-2012, 08:16 PM
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Originally Posted by ForcedInduction View Post
The ALDA is an emissions control device and overload protection. If you remove it the engine can be damaged if the wastegate hose fails.
Oh interesting, so are there any performance gains from removing it?
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  #12  
Old 04-03-2012, 08:42 PM
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None when its correctly adjusted. Only smoke.

It should be adjusted to where there is no visible smoke when the throttle is mashed from a standstill.
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  #13  
Old 04-03-2012, 09:09 PM
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Originally Posted by ForcedInduction View Post
None when its correctly adjusted. Only smoke.

It should be adjusted to where there is no visible smoke when the throttle is mashed from a standstill.
But there should be a small amount of smoke if you rev it in neutral right?
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Old 04-03-2012, 09:14 PM
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None.
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Old 04-03-2012, 09:53 PM
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Originally Posted by ForcedInduction View Post
None.
Oh ok, so you just turn it up until there is a little smoke then slowly back it off until there isn't any?
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  #16  
Old 04-03-2012, 10:06 PM
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Yep, thats all there is to it!
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  #17  
Old 04-04-2012, 08:35 PM
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Originally Posted by ForcedInduction View Post
Yep, thats all there is to it!
Well I attempted to adjust the ALDA today, I loosened the nut and turned the screw all the way in both directions and it made little to no difference to the amount of smoke when I rev the engine(which is alot) do you have to be driving to see any difference, because I was only doing this in neutral?

Also another thing I was wondering, I have all the EGR stuff still on the engine but no vacuum to it, does that make the EGR valve stay closed all the time as long as its working correctly and not leaking?

The engine starts and runs fine I'm just trying to get everything adjusted back to tip top shape, anything else I should check?
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  #18  
Old 04-04-2012, 09:29 PM
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Originally Posted by inlinesicks View Post
do you have to be driving to see any difference, because I was only doing this in neutral?
Yes, the engine must have a load.

Quote:
does that make the EGR valve stay closed all the time as long as its working correctly and not leaking?
Most of the time. Exhaust pressure can still push it open in some cases.
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  #19  
Old 05-14-2013, 01:01 AM
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Hi ForcedInduction,
Sorry to be so lazy but I am always short on time so I would like to steal some of yours.
They say I am a diesel mechanic but I guess it depends on who you talk to.
A few questions if you don't mind; (if you don't know off the top of your head don't waste your time looking something up for me). Most of my diesel experience is Cummins, International, Detroit, CAT, you get the idea, so you kind of know where I am coming from.
Car is a 1986 300sdl. 6 cylinder.
1. Inlet Fuel pressure; adjustable? how much? and is it like a Cummins 12V, too much is too much!
2. What turbo do I have? I'm guessing it's a t3 but looking for some verification. VGT? Wastegated or a blowoff?
3. Injection pump model#? can it be adjusted same as the 5 cyl. ones you have gone over in your other threads? Is the timing adjustable like a bosch p pump on a Cummins 12V? I have the timimg tools kit to adjust the Cummins but not a clue what the lift to degrees correspondence would be for a Mercedes. If it is adjustable how much is optimum? Right now I am running my Dodge Cummins at 19.5 degrees but I think the only reason I am getting away with that is the gears have so much play in them, 400K miles.
4. The boost pressures your recommending are low compared to what I am used to. Are these motors known for head gasket problems?
Any info or insite would be appreciated. Car is currently a daily driver.
Thanks, Paul
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  #20  
Old 05-14-2013, 07:37 AM
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1. Up to 30psi. More is not needed. Not adjustable.
2. T3-50
3. PES 6 M 55 C 320 RS, yes, adjustment is identical as the "W124" pictured. Timing is adjusted by following this: http://www.furi-dorifto.com/tech/MB_.../07.1-8300.pdf
4. High boost is not needed on these engines. Cummins need high boost to make power because they have a very low RPM limit, that means they need lots of torque to make little horsepower. These engines have a very high RPM limit (4800rpm) so they don't need lots of torque to make horsepower.
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