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Old 05-07-2001, 10:32 AM
Ivan C
Posts: n/a
My 86' 300SE W126 starts normally when the engine is hot but it is very hard to start when cold. I tried the best to pointout the main cause, it give me the following summary:
1. To start the cold engine, it need about 8-10 seconds.
2. To start the HOT engine, it starts instantly.
3. When the cold engine was started, I instantly switch it off and restart, it was started instantly.
4. I measured the battery by the voltmeter, the reading is about 11.5V.
5. I tried to press the acceleration pedal deeply when cold start, no improvement! (still need about 10 seconds)
6. I lived in Asia and the temperature of my area is about 20-30 *C.
I really want to make my car perfect and keep it forever (at least as long as I can!!)
Please help!! Thanks.
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Old 05-07-2001, 01:51 PM
Registered User
Join Date: May 1999
Location: New Location: VA Palo Alto HEALTH CARE SERVICES
Posts: 109
Ivan, ...for proper operation, ..your battery should be able to store 12 V or more in order for the relays and controls to function properly. Also, ..check your charging system, should be able to deliver 13.8 V or more. Your battery is about ready to give in. change it and let me know what happen..
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Old 05-08-2001, 09:32 AM
Join Date: Aug 2000
Location: Holland, MI
Posts: 1,316
Also check, or have checked the fuel system pressure during operation and after shutoff.

If the fuel system pressure bleeds down, like overnight, it may take a bit of time (cranking) to repressurize.

After engine has been running, if you restart before enough time has passed the pressure will still remain.

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