Mechanics

ENGINE STALLS AND STARTS AGAIN AFTER COOLING DOWN

2002 Mercedes Benz ML320

Hi,

I have been driving in the highway and the engine stalled and I had to pull over. Called the towing company but before the arrived, I was able to restart the engine (approximately after 20-30 min). Then I drove again and 10 min later the engine stalled again. When it cooled down, I was able to restart the engine. So it happened 3 times before I got home. The next morning the engine started with no problem but I did not risk driving.

What could be the cause?

Thank you
Avatar
Manmtl
June 11, 2012.




Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug 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

Tiny
Rasmataz
Jun 12, 2012.
Thank you for your expert advice. You were absolutely right. It turns out to be the crank sensor. Apparently it is a very common problem in the ML320 series.
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Tiny
Manmtl
Jun 12, 2012.
Your welcome-Thanks on the comeback with the CPS

Tiny
Rasmataz
Jun 12, 2012.

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