99 sl500 cranks but won't run

builtofficial

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Aug 16, 2024
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Your Mercedes
1999 SL500
I autocross this car and at the last event I was going around a sweeping corner and the car shut off. I've never had any running issues with the car. I towed it off the track and couldn't get fuel to the rail. easy enough. I towed it home, turned the key and the fuel primed normally but the car still wouldn't start. I scanned for codes but got nothing. I replaced the cam and crank sensors per some advice I saw here but still no start. I'm a bit lost at the moment and hoped someone might have some suggestions.
Notable points
-engine shut off while driving with no previous symptoms
-new cam and crank sensors
-no immobilizer(extra square fob from factory)
-fuel at rail
-cranks and turns over well
-I haven't checked spark physically yet but I assume whatever is supposed to tell the coils to fire isn't doing that

I hate to start a new thread because I have seen several like this one but I couldn't find anything similar to what I'm experiencing that wasn't a cam or crank sensor.
 

00slk

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Dec 1, 2012
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Cambridgeshire UK
Your Mercedes
2002 SL55 AMG, 2005 E320 CDi, 2014 SLK250 CDi, 2003 SLK200
On my fuel injection cars when I was racing them, there was a fuel cut off valve which would stop the fuel pump, in the event of a crash or 4 wheels off the ground jump and a hard landing would sometimes activate the switch and the car would cut out.
Not saying this is the problem, but maybe food for though?
 
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builtofficial

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Your Mercedes
1999 SL500
  • Thread Starter
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  • #3
On my fuel injection cars when I was racing them, there was a fuel cut off valve which would stop the fuel pump, in the event of a crash or 4 wheels off the ground jump and a hard landing would sometimes activate the switch and the car would cut out.
Not saying this is the problem, but maybe food for though?
I'll look for this and see if mine has one, this would explain the fuel cut but its been a month and I still cant get it to start even though I now have fuel
 


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