G Wagen Idling
I'm still trying to locate the throttle idle adjustment on my G 230, to help I've attached a couple of pics showing a screw which may be important, can anyone identify this screw for me?
Hi Andy go into your internet search engine enter K Jetronic fuel injection"..you will find a schematic and various pointers to setting up your K Jetronic system....that screw in your pics appears to be the idle stop and with the Yellow paint would have been set at the factory...adjustment of the idle mixture is with a screw the size of five pence piece and if you look down to the ground when looking at the top of the distributor cap it is at two o'clock... the fuel mixture adjustment is with an Allen key... but you need the schematic to locate the hole you put the key in......
Still looking into this, there is no idle mixture adjustment screw looking down at the distributor at the two o'clock position. It seems that thee would be in some cases but not on this engine 102 987 (from original maintenance booklet).
Looking at the maintenance manual, for this engine it glosses over the idle mixture adjustment, anyone have a manual for this type of engine/carb?
Hi the damaged screw with the yellow paint on it is the idle adjust.the mixture adjust is with a 3 mm allen key which alters the air ratio via the large plate you see in the air intake throat after you remove the duct that crosses over the engine to the the air filter..if the linkeage has been screwed at the chances are that the rods linking the accelerator pedal to the throttle are adjusted too tight..this will affect the idle speed which should be 650.700rpm when hot..cold start revs at 1000/1200 rpm for max 2 minutes
Thanks for that, I have adjusted the throttle linkage, and found the mixture adjustment, but I'm looking for the Idle mixture adjustment, which I know appears under the manifold 2 o'clock from the distributor on the 6 cylinder 2.8 lump, but apparently not on the 2.3 GE engine, at least not on mine.
So the mixture adjustment and idle mixture adjustment should be separate items no?
Hi the K jetronic schematic shows both fuel and air adjustments for the four cylinder engine but not the visual location relative to the rest of the fuel management system..... put Bosch K Jetronic injection system into your search engine...you will see what I mean.....
The auto-Solve page is very helpful explaining the principals, I can't find anything more specifically mercedes orientated.
I see the mixture adjustment i.e 3mm allen key could be the idle mixture adjustment, but it seems that other versions of the engine have both separate idle mixture, and mixture adjustment screws.
I am trying to find out whether this is the case with the 102 987 engine.
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Thank you, I am being very slow about solving this problem, I had a feeling this should be the idle stop, and I wonder why it is broken, but it must be part of the idling too fast problem.