scruffylookin29
Member
Hi there, I have been a long time member of the forum but this is my first post.
I previously worked as a mechanic 1990-2000 at an independent garage so I have a reasonable understanding is mechanics.
I’ve owned and rescued 4 A2’s over the years. I still own my original A2 53 plate TDI engine code BHC now has 230,000 miles owned for 7 years with regular servicing and VERY few problems. About 3 months ago the car developed a problem while running at about 1500-2500 rpm where it shook slightly but didn’t seem to affect the performance. Slowly over the next few weeks it got SO BAD the whole car would shake violently. It doesn’t matter if I’m moving or parked, clutch in or out 1000 or 3000rpm.
Strange thing happened a week or so later when it seemed to disappear completely for about 1 week but recently it reappeared and seems to vary from shaking really badly to extremely badly. I have my own ideas of what may be causing this but would appreciate your advice and experience before spending too much time (of which I don’t have much spare).
My thoughts
No.1 - Worn balance shaft chain/drive sprocket that may have jumped teeth and become out of balance. (not sure if this is even possible) 230,000 miles and no history of chain replacement. This I consider is the least likely cause.
No.2 – Blocked injector (not sure how easy they are to remove)
No.3 – Faulty fuel pump (slight fuel residue on end of cylinder head but has been like this for years)
No.4 – Electrical fault. Either wiring loom or earth fault (I’m aware these can both cause problems)
I do have another TDI BHC 2004 that I could swap parts over with to check components if needed.
I have a cheap hand scanner and there are no faults showing and also no lights on the dash.
Thanks in advance.
Lee
I previously worked as a mechanic 1990-2000 at an independent garage so I have a reasonable understanding is mechanics.
I’ve owned and rescued 4 A2’s over the years. I still own my original A2 53 plate TDI engine code BHC now has 230,000 miles owned for 7 years with regular servicing and VERY few problems. About 3 months ago the car developed a problem while running at about 1500-2500 rpm where it shook slightly but didn’t seem to affect the performance. Slowly over the next few weeks it got SO BAD the whole car would shake violently. It doesn’t matter if I’m moving or parked, clutch in or out 1000 or 3000rpm.
Strange thing happened a week or so later when it seemed to disappear completely for about 1 week but recently it reappeared and seems to vary from shaking really badly to extremely badly. I have my own ideas of what may be causing this but would appreciate your advice and experience before spending too much time (of which I don’t have much spare).
My thoughts
No.1 - Worn balance shaft chain/drive sprocket that may have jumped teeth and become out of balance. (not sure if this is even possible) 230,000 miles and no history of chain replacement. This I consider is the least likely cause.
No.2 – Blocked injector (not sure how easy they are to remove)
No.3 – Faulty fuel pump (slight fuel residue on end of cylinder head but has been like this for years)
No.4 – Electrical fault. Either wiring loom or earth fault (I’m aware these can both cause problems)
I do have another TDI BHC 2004 that I could swap parts over with to check components if needed.
I have a cheap hand scanner and there are no faults showing and also no lights on the dash.
Thanks in advance.
Lee