S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

Trouble starting the car

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Old Sep 23, 2009 | 12:15 AM
  #1  
to3033's Avatar
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Trouble starting the car

Hey all,

Car starts fine in the morning.
I drive it 5-10 miles, get the engine decently warm
outside temperature is low 70s, so not scorching
stop the car
come back for 5 minutes, try to start the car
most of the time it will start but ONLY if i press the gas pedal while cranking
if i don't push the gas pedal (and even if i do) sometimes the car doesn't start
the starter cranks like mad, so i doubt it's a battery issue, but there is just no sense of any turn over

usually, also, the car feels like it will want to cut out on me on these warm starts when I put it in reverse (not drive though) - no clue if that is related to the starting problem, but it's partly why I wrote a new thread instead of looking up vapor lock threads

i'm not a mechanic, but i'm just trying to get a hold on how much this kind of thing may cost (if it's a well-known problem with a ubiquitous fix) or alternatively just trying to hear people's opinions on what this is.
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Old Sep 23, 2009 | 01:22 PM
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TMAllison's Avatar
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From: Bay Area, CA
09' E320
Is possibly the CPS although it doesn't sound like a classic CPS failure. That failure occurs when the CPS overheats and stops transmitting ref data to the computer concerning inj & ign timing. After it cools down for 30 minutes it usually restarts, then overheats again and dies.
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Old Jan 27, 2010 | 04:11 PM
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MEESEZ's Avatar
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S 320-SWB -1995
I think it need to change the Fuel Pressure Regulator...
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