1989 MERCEDES 300E STALLS and STARTS AFTER 3-4 TURNS

” 1989 MERCEDES 300E STALLES STARTS AFTER 3 4 TURNS TRIED NEW ALTINATOR AND FUEL PUMP FILTER NO LUCK THANKS GEORGE/”

those old 6 cylinder benzes generally all burn a lot of engine oil as they age due to their poor valve design. So first, pull out the spark plugs and see what they look like. If they’re all burned and covered with black crud, that’s burned oil. Replace them and see what happens (and realize if the plugs are really clogged that the engine is just plain wearing out.) Now if you put in new plugs and it still stalls out, then odds are you have a fuel system problem. Have the fuel pump pressure and volume tested to see if it’s wearing out. That old fuel injection system is a mechanical system, and if the fuel pressure isn’t exact, it won’t run worth beans. The mechanical fuel injection distributor under the air filter will also often get clogged up and may need to be taken apart and cleaned (only a good mechanic should ever try that, they are VERY touchy about correct settings.) You must realize that your car has mechanical (not electrical) fuel injectors which operate like inverted bicycle tire valves. ANY dirt or corrosion wrecks havoc with them,and they will not operate correctly without the exact pressure that they were designed for. Good Luck,