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1989 Mercedes Benz 300e Repair Question


Topics covered: Spark, Fuel pump, Engine.
Mileage: No information provided.

Asked on February 24, 2011

1989 300e wont start keeps winding over

Hi i have a 1989 300e and it wont start it has done it onece b4 then i tried it 30mins later and it went we were driveing it and it was going fine then it got parked up 4 a week and it just wont start now. It has good fuel presure up to the engine and it has good spark but just keeps winding over
Avatar Asked by 454chevy

Answer

Replied on March 29, 2011

Get a helper disconnect a spark plug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems
with compression and valves opening and closing at the wrong time/broken or jumped timing
belt/chain.

Tiny Answered by rasmataz
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