bad start in a mercedes 380 se 1984

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- pepe
  
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posted
16 years ago

Sun, Jul 29, 2007 8:31 PM

I have a start prolem in my 84=B4 380 SE (USA version) whith 100, 000 miles In cold conditions,( in the morning),it starts perfectly,but, when you stop the car after a trip, the temp gauge reads 85=BA C - normal temp-, and wait one or two hours -the temp gauge reads 40=BAC-, and try to start, the engine turns but no start , after try four or five times ,the engine runs, but hesitate, and finally runs well again,someone has a idea about this problem, I suspect about some water or oil temp sensor

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- -->> T.G. Lambach
  
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posted
16 years ago

Sun, Jul 29, 2007 10:06 PM

Is the exhaust clean when it does finally start?

Or does the exhaust reek of unburned fuel?

If the latter, the engine is being "flooded" by a fuel leak and should start if you press the accelerator while the motor is being cranked by the starter. Such "flooding" can occur from one or more leaking fuel injectors as one example. Flooding" doesn't affect a cold engine for the extra fuel is needed to start a cold motor. Hot motors don't need extra fuel to start.

If the exhaust is clean on start up the problem's cause may be electrical.

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- Tiger
  
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posted
16 years ago

Mon, Jul 30, 2007 3:56 AM

I had this car and I know exactly what you got... hot start problem. This is because of fuel pressure loss and the fuel will simply turn into vapor with hot engine.... vapor lock... which is why you can't start your engine easily.

Two possibilities: Fuel accumulator shot... this is located above your fuel filter in the back... one side is rubber hose... disconnect it and if fuel keep coming out of it... it is bad.

Compensator valve on the fuel distributor. It is the o-ring that deteriorated... it is located directly on top of the fuel distributor... with a hex bolt or a torx bolt... once removed, use something to pull that piston out and replace the o-ring.