Mechanical Fuel Injection issues – 1967 MB 280SE

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crazygaz

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Has anyone any experience with an old Mechanical Injection system? i.e. how to service?

The car hardly runs, its real ropey!

I have replaced distributor cap, points, contacts, plugs and have a fantastic spark! I removed the injectors and have had them flushed as they are a sealed unit and it does not appear that you can service them.

So my next issue seems to be the mechanical fuel injection system?

Advice? / Help?
 

meanie

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You have the old 'in line' pump similar to early diesel pumps.
inj pump.jpg
Have you checked the compressions?
In the circled area 1 you'll find the mixture adjusting screw (it's not pictured).NEVER ENGAGE OR TURN THIS WITH THE ENGINE RUNNING-AT BEST,YOU'LL DESTROY THE PUMP!!!!To adjust the mixture,push it in & turn until you feel it engage,then turn it a bit,release & recheck the mixture.Aim for 3 to 3.5% at idle.
Check that the throttle body is clean & that no-one has tampered with the throttle stop screw.

http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=108018&M=130.980&CT=M&cat=230&SID=14&SGR=001&SGN=01
In the above link part 145 is the idle screw,check that this circuit is clean & has no air leaks (including past the screw threads).
 
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crazygaz

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Thanks for the advice so far, its time for me to play :)
 

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