Mercedes-Benz Forum banner
1 - 3 of 3 Posts

·
Moderator
2.3-16 | A3 2.0T | 986 Boxster
Joined
·
5,048 Posts
Welcome to the forum. I'm confused... You took you car to a diesel mechanic to have it fixed. He band-aid fixed it and it failed when you got home. Then you go to the junkyard to find a fuel pump and the yard attendant tries selling you a new motor. I'd believe the mechanic, unless the yard attendant is a MB diesel expert. I don't know what would be "lifted" besides a fuel line that would cause the pump to fail. You are sure it's not the injection pump? I can think of several things you can lift on the IP to get it running. A new fuel pump should be $200 or less, a new IP I bet, is well over $1000. Besides cold and a bad glow plug system the next thing that would prevent a diesel from starting and running is air in the fuel system or a vacuum leak (which would put air in the fuel system). Is it an auto or manual? How long have you had this diesel?
 

·
Moderator
2.3-16 | A3 2.0T | 986 Boxster
Joined
·
5,048 Posts
For $700 it has to be the IP and not the fuel pump. Just did a quick search for a rebuilt IP for a 2.5 and found one for $1800. What was the first symptom when the car stopped working? Have you ever changed or adjusted your timing? How about the IP timing gear? Those IPs are industructable, thats why they can pull WVO with no modification or preheating. Almost sounds like a timing problem since you say there is no air in the system. Have you tried to start it with starting fluid sprayed directly into the intake? If you need an IP and if you don't feel comfortable pulling the IP and rebuilding it yourself then get a second opinion. Where are you located? Someone here may be able to suggest a better mechanic. Hate to send you someplace else but try the forum at greasecar.com. Although they are crunchy globe loving treehuggers, they were very helpful when I had my diesel and was new to whole thing.
 

·
Moderator
2.3-16 | A3 2.0T | 986 Boxster
Joined
·
5,048 Posts
Yeah it's all related to the timing chain. If the IP isn't timed correctly it will run like shit. Was it using more fuel than usual and was the acceleration slower than usual? Did it smoke after startup? If so, what color? If you answered yes to these it defenitely sounds like the timing is out of sync. My Volvo diesel had the same, just shutrting off symptoms at one time. I narrowed it down to a bad ground. My VW diesels would run without a battery, I doubt your MB will. So you don't remember weather your mechanic said injection or fuel pump?
 
1 - 3 of 3 Posts
Top