View Single Post
Old 06-10-2003, 04:42 AM
neileg neileg is offline
Registered User
Join Date: Sep 2002
Location: Newcastle upon Tyne, UK
Posts: 215
The fuel pump runs all the time that the engine is running and you can hear it if you stand at the rear of the car. A pump in good condition may be almost silent, or produce a little 'sizzle'. As it deteriorates, the noise usually gets louder and harsher. However noisy fuel pumps can often go on for a long time without causing a problem, so you can't be certain,

In theory, a fuel pressure test can be carried out, but that will only tell you that the pump is working at the time you test it.

When I had the problem on my 190 I figured that the cost of replacement ( about $140 for the pump and $40 for the fuel filter) was less than I had already paid for a Bosch technician to fail to diagnose the problem. I was fortunate that this worked for me.
Cheers, Neil
Reply With Quote