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My Mercedes E200 -99 don't want to start. The start motor cranks. No fuel is comming to the motor. I can't hear the fuelpump start. I have take out the cable connection to the battery and waited 15 min and then put it on again but no change. Is it any one how now where the power comes from to the fuel pump? I have check all fuses. 4 places. Please give me any good advice... Best Regards Martin
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if low pressure (carby) disconnect fuel line and observe flow. If high pressure (FI) connect fuel pressure guage and observe pressure. Check fuel filter while doing all this. Filters are the source of many problems that start people messing with fuel pumps.
Have you checked that it is getting fuel????
Slightly undo one or two of the injector lines on the fuel distributor and have someone turn on the ignition while you slightly depress the disc from the airflow-meter box. If there is no fuel coming up than you have a fuel problem. That can be electrical, faulty fuelpump, the little control box that is bolted to the fuel distributor called electro-hydralic-actuator or even the fuel distributor itself.
Simply a process of elimination.
Fuel
Spark
etc.
Hope this helps
most likely you have a bad crank sensor or fuel problem you need to check fuel pressure ,if you have enough pressure ,most likely you need crank position sensor,if you don`t have fuel pressure ,it might be your fuel pump relay or the pump, i would start with the relay first very unexpensive. you can also hear the pump if it`s working by cranking the engine and listening rear of the car for a humming sound . good luck
Your car may have set a problem Code and a scanner will identify it. Since you have all dashlights on during the cranking phase, you just don't see it until the engine would start.
What you can try is a little starting fluid. If the motor tries to start or runs briefly, you have found that you have a fuel problem and the engine is firing. There is a test tap on the fuelrail for fuelpump pressure. If you have no pressure it indicates the fuelpump is not working and you need to find out if it is getting power. Also, if there is fuel pressure, you need to find out if the injectors are working.
The autoparts stores have loaner programs for the injector bulbs and the fuelpressure meter. Each area can be tested to see why you are not getting gas into the engine.
Should you not get results from the starting fluid, you will need to look at the spark system. If the starting fluid does nothing, then you probably have no spark. There are ignition Relays which provide power to the coil and crankshaft sensors which tell the spark to go to a particular cylinder. If you do not have power going through the coil, it may be bad or not receiving power from the ignition or crankshaft sensor.
Autozone.com has free wiring diagrams and fusebox diagrams available online when you register your car on its site. If you suspect a bad coil, it can be hand carried and bench checked.
There are fuelpump relays for electric fuelpumps. You can have a bad fuelpump with either a mechanical or electric pump. You can have a clogged filter.
You can try Autozone.com and register your vehicle for free. Then you can get wiring diagrams and fusebox diagrams for the electric relays. Then you can find out which system you have.
It certainly sounds like you are on the right track since you discovered its a fuel problem.
Turn the key and listen for a hum (keep doors closed but a window down and radio off). Don't turn the key all the way to try to crank it, just the turn to get all the lights in the dash on. If you hear a slight hum or buzz that last a second or two that is your fuel pump. If you don't hear it, check your fuse for the fuel pump, if that is not blown, your fuel pump may have gone out.
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