Trouble starting 300(C)E
Thread Starter
Newbie
Joined: Aug 2002
Posts: 10
Likes: 0
From: San Diego
300 CE
Trouble starting 300(C)E
It takes multiple attempts to start the engine in the morning. When the engine does start the rpm's go up and the engine idles very rough then dies suddenly. If I pump the gas pedal I can usually keep the rpm's high enough so that the engine doesn't die. Once idleing, the car rides very smooth.
I have tried all different grades of gas as well as valve cleaners which have not helped.
Any suggestions??
I have tried all different grades of gas as well as valve cleaners which have not helped.
Any suggestions??
Member
Joined: Jan 2002
Posts: 184
Likes: 1
From: Montreal, Canada
260E , 1989 (for now)
Possible causes:
*Bad fuel accumulator
*clogged fuel filter.
*defective fuel distributor
*Bad plugs/distributor cap/rotor/plug wires
*Defective Cold start valve
*Vacuum leak
and others.
JackD
*Bad fuel accumulator
*clogged fuel filter.
*defective fuel distributor
*Bad plugs/distributor cap/rotor/plug wires
*Defective Cold start valve
*Vacuum leak
and others.
JackD
Member
Joined: Jan 2002
Posts: 184
Likes: 1
From: Montreal, Canada
260E , 1989 (for now)
I'd start with items that have not been looked at for the longest time.
As the problem you are describing can have many causes. It is, at the same time, very likely or very unlikely that your first attempt will be the once resolving the issue.
I would have a good diagnostic done first by an experienced Mercedes shop. If the car did not have a good tune-up in the last 25,000mi.or so, this would be a good start.
jackD
As the problem you are describing can have many causes. It is, at the same time, very likely or very unlikely that your first attempt will be the once resolving the issue.
I would have a good diagnostic done first by an experienced Mercedes shop. If the car did not have a good tune-up in the last 25,000mi.or so, this would be a good start.
jackD
MBWorld Fanatic!
Joined: Aug 2002
Posts: 1,005
Likes: 33
From: Germany
'00 S320 W220, '98 A160 W168/ sold in 2005 '86 260 E W124 '90 260E W124
just to add to the list of Jackd:
*shot temp-sensors, or broken wires of those
*defective backflow valve of the fuel pump
If you are a DIY than start with the simple things like new plugs, check the plug wires, the distributor cap and the rotor, new airfilter, check temperature sensors and their wiring, vacuum leaks in the intake system, function of the cold start valve. Anything beyond that requires more diagnosis tools, such as fuel pressure measurements or checking and replacing the fuel pump and fuel filter (big mess!!!).
If your are no DIY at all than go for Jackd advise and see a mechanic who knows MB well.
Good luck.
*shot temp-sensors, or broken wires of those
*defective backflow valve of the fuel pump
If you are a DIY than start with the simple things like new plugs, check the plug wires, the distributor cap and the rotor, new airfilter, check temperature sensors and their wiring, vacuum leaks in the intake system, function of the cold start valve. Anything beyond that requires more diagnosis tools, such as fuel pressure measurements or checking and replacing the fuel pump and fuel filter (big mess!!!).
If your are no DIY at all than go for Jackd advise and see a mechanic who knows MB well.
Good luck.
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