Mercedes-Benz W201 no fuel reaching the injectors (K/KE-Jetronic)
190 1.8190E 2.0190E 2.3190E 2.5-16190E 2.6
Mercedes-Benz W201 won't start even though the fuel pump hums – why is no fuel reaching the injectors?
The most common causes are a clogged fuel filter, clogged small screens in the injector outlets of the fuel distributor and a faulty pressure regulator. A clogged filter may let the engine run only briefly, because the pressure does not rise to the main injectors.
What is the correct system pressure for K/KE-Jetronic?
The factory value is 5.25–5.6 bar. The pressure must also hold: at least 2.7 bar after 10 minutes and 2.6 bar after 20 minutes. If the pressure is zero, the fault is in the pressure regulator or the transfer pump.
What else should you check if the pressure is fine or the fault appears when the tank is low?
Check that the pressure and return hoses are the right way round and that the accumulator and the pressure regulator's equaliser are not rusted. In the M103-engined 190E 2.6, the baffle pot inside the tank can run empty, so that the pumps suck air.
Related articles
Mercedes-Benz W201 ABS warning light onMercedes-Benz W201 battery drains overnightMercedes-Benz W201 fuel pump not running – pump relayMercedes-Benz W201 radiator fan not spinningMercedes-Benz W201 airflow meter potentiometerMercedes-Benz W201 air conditioning leak and cooling performanceMercedes-Benz W201 vacuum leak and the injection rubber bootMercedes-Benz W201 timing chain and chain tensioner