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Hi, does any of you out there have the same problem and how did you solve it? My starts up momentarily only to cut off again a split second later .... feels like its the fuel line as there seem to be no fuel going in. I have already changed the fuel pumps and accumulator. Ans once shut off for about half an hour, the problem returns. Is it due to the fuel injection module?<br> HELP!!!! : )
 

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Discussion Starter #2
I just had my KE5 system cleaned out and the performance is better. Lighter trottle and more responsiveness. However, the starting problem is still not resolved yet. As such, I suspect the ECU module or the air flow sensor is at fault. <br> I will clean out the ecu connectors and keep resaults posted. : )
 

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I am really tired of this problem. Mine starts with no problem. The frustrating problem is that it will shut off whenever it wants. Sometimes it will run for weeks and it will not shutt-out. Then it will, whether in the freeway or at the stop lights or idle. However I kinda suspect that power is weak before it shuts-off. The car kinda accelerate sluggishly and feels heavy at the throttle and then I notice it will shut off. Before it shuts-off though, the motor freezes and the tachometer will slow go down to 0 and then it completely cuts-out. I had the car inspect and the mechanic sent it back with the problem because he can't find what it is thats causes the problem. He had me change the fuel module and it wasn't the problem. The more it happens, I begin to suspect it has something to do with fuel. I wish I know what it is, expensive or not, I will get it fix. However, by changing what the mechanic suspect, I have spent over $800 and I am still left with the problem. I am very disapointed at this time. I do not wish to sell the car with this problem to anyone. If there is anybody out there with any ideas or suspicionf, please e-mail me, any information is helpful.
 

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Discussion Starter #4
My problem has yet to be solved either. I have checked the following parts but none seems to be the problem :<br> - Camshaft sensor<br> - clutch plate sensor<br> - coolant sensor<br> - fuel pump<br> - accumulator<br> - fuel injection (KE5)<br> <br> I really suspect the only last thing left is the ECU where all other electronics are plugged in. I am getting mine checked. That'll cost a bomb (US$ 2000 I believe) but if it is .... why not : )
 

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Discussion Starter #5
I finally found my problem. The fuel distributor wasn't functioning optimally all the time. I believe a couple of the electromagnetic diaphrams weren't functioning too well .Its gonna cost a bomb as each unit cost US 2000 to replace. Shucks ...
 

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500 sl
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Exact same problem with 500sl

First post on this forum, new owner of a 1991 500sl, have this identical problem with it. Runs perfectly for a few weeks, then usually only when the engine is warm (cold and hot fine) it will start and then immediately shut off and then its a pain to start again. (although it always does)

Was in Mercedes HQ here and they say its the ecu and will cost 1000's taking to a chip tuning company next week for a complete check up and re-programming of the ecu to see if that clears the fault. Updates soon. Anyone else got solutions to this problem ?
 

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ok, after having the exact same problem with a 500sl, and after a chip programmer confirmed that there was nothing wrong with the ecu settings, I sent the car to a Bosch Specialist. 8 new injectors and a bosch tune up later, and after replacing one of many temparture senders, the problem is gone. Its questionable which one fixed the problem, the bosch tune up, the injectors or the temp sender. but the problem is gone.
 

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Mercedes Benz R129 SL 300 24
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Re: 1991 SL300-24. Fuel Distributor Problem

Hi Im from Bombay, India
I have a 1991 Sl 300 24 Valve. I got a tune up and the car was running beautifully. A few days later the car would take a long crank to start but would eventually start. I was out for a vacation for two weeks and found that the car would not start.

My mechanic pointed out to the fuel distributor. We loosened one of the fuel pipes on the distributor to check for fuel supply and there was no supply. Checked the inlet and found that the supply of fuel is fine. On investigating further, the diaphram was torn at a place. Now i have to get a replacement.

I have temporarily fixed the thing but it misses when starting and then as you rev, the missing disappears around 1500 rpm.

I am thinking of getting a used one from Dronsfields Mercedes UK where i have been getting a lot of parts for my other mercs too

There are two numbers on the part;


I think i should also change the injectors while im at it. What would you guys recommend?
 

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Sounds like a problem I have had on two occasions after its been stood for more than a week and the weather's been damp. Turned out to be a cracked distributor cap.
 
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