Mechanics

'79 WON'T START AFTER RAIN

1979 Mercedes Benz 450sl • V8 2WD Automatic • 250 miles

'79 450SL Mercedes, runs very well. Rained heavily last two days, forgot to cover it. Now, it turns over great, but won't start. Tried jumping it, but that didn't work. Ideas? Thought I would let it dry and see if that fixed it
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Sparky79
February 19, 2011.



**Cranks but no start condition: Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 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 so, 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, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.

Rasmataz
Mar 14, 2011.