S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

Won't start, many tests performed.....

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Old Feb 26, 2012 | 09:40 PM
  #1  
sasmith's Avatar
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From: Eugene, OR
'04 c230 Coupe, '09 SLK 55
Won't start, many tests performed.....

Hello All,
I have a ’85 500 SEC Euro.
The last time I drove it, twice I got a couple of slow sputtering starts from a stop light. Once the RPM’s got up it seemed to run fine. Not wanting to get stranded, I immediately drove it home and let it sit for a couple of days. I tried to start it a couple days later and it wouldn’t start at all. It cranks just fine, but won’t start.
After searching the forums, I’ve tried these things:
1. Put more gas in. (the simple things first)

2. Checked the fuel pump, heard the buzz of the pump.
3. Checked the fuel pump relay and crossed #7 and #8 pin, heard the buzz of the pump and tried to start it.
4. Checked the coil by pulling a spark plug and checked for a spark. Got a spark.
Any other DIY checks before I relent and tow it to a dealership?????
I appreciate the help!

Steve

BTW, this car is for sale: http://www.stilife.com/sec/

Last edited by sasmith; Feb 26, 2012 at 10:09 PM. Reason: Edit
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Old Mar 5, 2012 | 02:18 AM
  #2  
dtkw's Avatar
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Joined: Jun 2003
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From: Indiana
1986 560SEL, 97 BMW 740iL
How old is the battery? If it get under 12 v, the car won't start.
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Old Mar 12, 2012 | 12:34 PM
  #3  
sasmith's Avatar
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From: Eugene, OR
'04 c230 Coupe, '09 SLK 55
Thanks for the input.

The car has been on a charger and it cranks strong.

Since the last post, I've disconnected the fuel line into the fuel distributor and had good fuel flow. I've also enriched the fuel mixture. Enriching had no effect so I put it back to the previous setting.

Any other thoughts?

Thanks,

S.
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