!997 S-320, starter and engine turns but it does not start. Any ideas? - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 03-20-2008, 06:54 AM Thread Starter
BenzWorld Newbie
Date registered: Mar 2008
Posts: 1
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
!997 S-320, starter and engine both turn but engine does not start. Any ideas?

Last edited by stingray; 03-20-2008 at 07:23 AM. Reason: bad grammar
stingray is offline  
Sponsored Links
post #2 of 4 (permalink) Old 03-20-2008, 09:59 AM
BenzWorld Member
Date registered: Mar 2008
Vehicle: CLS550 Master Lease, 1990 300zxTT, 2000 camry
Location: Augusta, Ga
Posts: 361
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Crank or cam position sensor probably, also could possible be fuel related. Do you have fuel pressure?
kyle21nluvnit is offline  
post #3 of 4 (permalink) Old 03-22-2008, 06:56 AM
BenzWorld Member
Date registered: Feb 2008
Posts: 175
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
If the gasoline engine only cranks but never fires up, one of the most cost effective ways to test whether the fuel system is at fault is to spray "Starting Fluid" into the intake manifold, down-stream of the MAF. If you have not use starting-fluid before, be aware that starting fluid is extremely flammable. No one should be anywhere near the opening of where you sprayed. Although, I myself have never have anything bad happened to me personally, potentially it can. It may be prudent to wear a protective glove too.

If the fault is only due to the fuel system, the engine will start right up and runs as long as you continue to spray into the intake.

Combustion will take place if a good spark occurs at the right time, and a sufficiently well mixed air/fuel charge is present at the right ratio.

Last edited by techyiam; 03-22-2008 at 10:05 AM.
techyiam is offline  
post #4 of 4 (permalink) Old 03-22-2008, 09:04 AM
BenzWorld Elite
Kajtek1's Avatar
Date registered: Dec 2005
Vehicle: w211 E320 wagon 4M / Bluetec / Ford SD. Seeking affordable diesel pushmower
Location: CA Bay Area
Posts: 31,479
Mentioned: 9 Post(s)
Quoted: 1044 Post(s)
Easy way to check the fuel system is press the tire-style valve on the fuel rail, while somebody is cranking the engine. It suppose to give a good spray, while some flow might be residual pressure.
One of the way pointing to CPS is observe tachometer. If it doesn't move during the cranking, it confirms CPS fault.
Kajtek1 is offline  
Sponsored Links

  Mercedes-Benz Forum > General Mercedes-Benz Forums > General Mercedes-Benz

Quick Reply

Register Now

In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode

    Similar Threads
    Topic Author Forum Replies Last Post
    HELP! S-320 will not start! but finally got to start with direct power to starter Newinport W140 S-Class 12 07-23-2013 12:49 PM
    MB 230E (W124) Starter Turns Engine, but it will not Start morganGDFP W124 E,CE,D,TD Class 0 02-03-2007 09:28 AM
    starter turns, engine doesn't lightnin Vintage Mercedes-Benz 1 10-29-2006 05:08 PM
    110cdi engine turns but won't start petesavi V-Class 3 02-27-2005 09:45 PM
    engine turns over doesnt start please help classic benz W126 S,SE,SEC,SEL,SD,SDL Class 3 04-23-2004 11:07 PM

    Posting Rules  
    You may post new threads
    You may post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On


    Title goes here

    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome