BenzWorld Junior Member
Date registered: Apr 2005
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
RE: 450SEL fuel pump question
HI. My 450SEL has not had made noise or ticking from the fuel pump in 7 the years I have had it.
However starting is instantanious with a reasonably charged battery, diffult with a smaller than standard or undercharged battery. Mine would churn away for 10 or 20 seconds before starting until I decided to charge the battery fully, then it became instantanious. I finally put in a full sized heavy duty battery, and lately I use a trickle chrager ( I only use it once a month) and no more starting delays.
Incidently, the fuel injection can only work from the high pressure pump. The vacuum will not suck fuel through the injection system as it will through a carburettor.