MrMayze
Active Member
- Posts
- 289
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- Cheshire West
Hoping someone can help me diagnose this noise.
It's a 300 tdi auto edc.
It started making a loud knocking noise when the engine revs drop too just before idle. Being a compleate bastard it's compleatly intermittent, but in an odd way. It will do it every time the revs drop almost on command then sometimes you can turn it off and back on again and it won't make any noise for as long as then engine is running sometimes it will keep coming back. Basically whatever it decides it going to do when it starts up it will continue to do as long as the engines running. It did however give a little rattle when started yesterday and cleared but was fine this morning and ran absolutely fine for four hours.
The noise itself is not rev related but sounds more like something ratting. It's coming from around the injector pump. It is a very angry metallic sound though.
So far I have eliminated the vacuum pump, the lift pump, run it without the aux belt so I'm certain it's nothing that run off that. The lifters and push rods all seem fine and I can't find any thing loose.
I have a spare injector pump so I may change that but I really would like to avoid randomly spending money on guess work.
It's a 300 tdi auto edc.
It started making a loud knocking noise when the engine revs drop too just before idle. Being a compleate bastard it's compleatly intermittent, but in an odd way. It will do it every time the revs drop almost on command then sometimes you can turn it off and back on again and it won't make any noise for as long as then engine is running sometimes it will keep coming back. Basically whatever it decides it going to do when it starts up it will continue to do as long as the engines running. It did however give a little rattle when started yesterday and cleared but was fine this morning and ran absolutely fine for four hours.
The noise itself is not rev related but sounds more like something ratting. It's coming from around the injector pump. It is a very angry metallic sound though.
So far I have eliminated the vacuum pump, the lift pump, run it without the aux belt so I'm certain it's nothing that run off that. The lifters and push rods all seem fine and I can't find any thing loose.
I have a spare injector pump so I may change that but I really would like to avoid randomly spending money on guess work.