Question about 1999 Mercedes-Benz SLK

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SLK stalling problem

My 1999 SLK has developed a random engine stall. In most cases, the engine does not crank on restart, but after several attempts it does. The fuel pump also sounds like it humms when it does start, the hum is noticably absent with a failed start. Would a faulty fuel pump cause a failure to crank?? I would think the engine would still crank during fuel pump failure.

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No if the fuel pump is failing it wont start. what about fuel filter ? what you can do is find a shop with a scope and they can check the fuel pump on it and look at the wave pattern and can tell you good or bad. but when it happens and you cant hear it it is time to check it properly before it leaves you stranded.

Posted on Jun 02, 2009

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Posted on Jan 02, 2017

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My 96 Ford windstar was running just died in the middle of the street I bought a computer thinking that was the problem it cranks but won't fire


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Learn more about Ford Windstar at the Edmunds.com Car Forums! ... Then on Friday it died while I was driving down the street. ... I have a 3.8L v6 1996 Ford Windstar. .... Then yesterday the car just died while driving and had to be towed back to .... The engine will crank, start run about 5 seconds then stop.

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I have a 2006 dodge magnum it will start sometime fine but then it will start then about 3 seconds it would cut off to it to dodge twice they cant find out anything changed the battery got i new key...


can i buy a comma., says Vanna White>?
one rule of dealers, (avoid them use independent ASE shops)
or go broke. ($25 spark plugs there... i warned yah)
rule 2,
never take a car to any dealer unless you can DEMONSTRATE the failure. most shops can NOT fix cars that work,
they will try, and charge you CASH for trying, and no blush.

my impression is, the cars issues are INTERMITTENT.
if you dont know cars and electrics, then it may be impossible for you.
but some nicer independant shops might drive it for a day for you
to get it to fail. that WORKS, see WHY?

your engine stalls. that is the key word, random STALLS.
now lets work that IDEA.
there are 3 paths (one of them works out to 50 causes)
here they are..
1 bad DC power, 2 bad engine , or 3 vbad ISC controls.
all my answers ASSUME the car is 100% tunedup using the 60k miles column ! or up to 100k on some. cars. did you?
when it stalls can YOUR right foot (fast moving) save the stall.
??????????????????
does the stalled engine easily restart?????????????????????


The engine brain, PCM/ECU does all it can to stop stalls.
it does, if it stalls, its a very serious failure !
Now the full list ,( expanded)
1: lost of 12vdc electrical power to the EFI system. (voltmeter 101)
use a voltmeter to catch it. seen even at the cig lighter port.!!!!
2: lost spark? wont restart? (do the classic spark test)
3: lost fueling ? more tests (no start, try test fuel)
3A; flooding,? spark tips soaking wet. use WIDE open throttle to start engine and cut fuel , cranking, this help , try starting with 10% throttle ti see if ISC is stuck closed.
4: bad engine, the 50 ways and engine can fail. lost compression , on any or all cylinders , will do that. hot or cold or both .???????
one way to solve problems is by elimination.
say some head valves stick, only hot and only randomly. (nasty issues)

you find that (not saying it is, i never guess)
you prove that this way, examples
good 12vdc, power, checked.
good spark, checked. on all cylinders, not just 1.
injectors test pass, no leak down test failures and the injector balance test passes. (the FSM covers these 6 tests for fuel pressure)
conclusion"
so must be engine bad, it stalls, and runs bad , restarted or not at all.
so you find compression on 2 cylinders are low , 25psi, hot.
all else was tested good so i attack the engine'.
on old engines, i do that first.

so do tell what engine does and does not fully,
your post leaves out most facts.
stalls, and can you save the stall.
and does it restart.
and do you have 12VDC power at stall.

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