Poor Starting
 

I bought my 190E, 2.3, new in 87 and have developed starting problems since last winter. The symptoms are : after the car stands idle 8 - 10 hours it takes 10 to 15 cranks before the engine will fire up. After that it runs like a clock. Restarting only requires 1 - 2 cranks, etc. I´ve
had the car in the Mercedes Shop on 2 occasions regarding but they could not apply a fix since the problem is sporadic (like going to the dentist and when you arrive the tooth ache has disappears). I have swapped out several of the components, e.g., Bosch JE Pressure Stabilizer, Fuel Pump Pressure Resevore, new Fuel Pump Filter, Temprature Sensor, Spark Plugs,
inspected and cleaned the Distributer Cap. I also checked the OVP as best I could with an ohm meter, etc. I´ve read several posts regarding OVP problems, however; the ECU must be getting current, since after the motor once starts every thing returns to normal. The problem does not seem ambient temprature related since it also is there in the summer months. Incedentally the OVP has two fuses and by the looks of a schmatic printed on the side the circut seems duplicated with
two diodes and one transistor in the unit. I really need some advice. Thanks.

Question:
 

Where are you?
Nearest major city.

How many miles on the car?




Have a great day.

hi hunter
 

I live in Germany near Wiesbaden. The car has 200,000 km and has been
well maintained. In very good condition after 20 years. Any tips regarding
the start problem would be appreciated.

fuel pump check valve.allowing system to empty while it stands.

where is this valve located?

poor starting
 

thanks david. i will go to a junk yard tomorrow. think they have a fuel pump and will let u know the results.

poor starting
 

there is a little check valve at one end of the fuel pump Joel. tks.
bbu

Poor Starting
 

For those interested, I want to thank Mr. Poole (see previous post) for putting me on the right track. This intermittent starting problem has been bugging me for 20 years. Replaced the fuel pump check valve and next morning no more starting problem.
bbu