Trouble with start
Thread Starter
Newbie
Joined: Apr 2004
Posts: 13
Likes: 0
From: Ontario, Canada
1993 500SEL W140, 1998 C280 Sport, 1996 W140 S500 long
Trouble with start
Hi guys, I am new on this forum eventhough I have been reading posts for a while, but i never commented until now.
Here is my problem:
lately i have been experiencing problems when starting my '91 300E. It will not start unless the accelerator pedal is pressed (it doesn't matter if it's hot or cold outside). At first this was happening only when the engine was cold but lately this occurs every time i start the car. What could be the cause of this?
Also when the car starts i have to rev it up a little (maybe up to 2000-rpms) until it starts to operate smoothly and quietly. At first it seems as if not all the sparkplugs are working. After this the engine runs and still performs very good.
The spark-plugs are fairly new, as well as the ignition cap & rotor
and the ignition cables).
Other then that I am very happy with the car, i have it for 2 years by now and it's almost at 220 000 KMS.
Thanks for any suggestions!
Here is my problem:
lately i have been experiencing problems when starting my '91 300E. It will not start unless the accelerator pedal is pressed (it doesn't matter if it's hot or cold outside). At first this was happening only when the engine was cold but lately this occurs every time i start the car. What could be the cause of this?
Also when the car starts i have to rev it up a little (maybe up to 2000-rpms) until it starts to operate smoothly and quietly. At first it seems as if not all the sparkplugs are working. After this the engine runs and still performs very good.
The spark-plugs are fairly new, as well as the ignition cap & rotor
and the ignition cables).
Other then that I am very happy with the car, i have it for 2 years by now and it's almost at 220 000 KMS.
Thanks for any suggestions!
Super Member
Joined: Jun 2003
Posts: 595
Likes: 0
From: Middlefield, CT
1994 E320
The cold start valve could be faulty. As the engine does not start easily, it is likely the valve does not open. On the other hand if the idle is rough, the valve could be stuck open or leaking, messing up the mixture.
