12 replies to this topic

[zeroasylum]

Model:studio 2 998
Year:1980
Description of problem (please be as in depth as possible):

Went for my MOT last week and had to get my engine adjusted for emissions so asked them to tune it as well (brought it to mini specialist). It was fine until Friday morning when I went to go to work it made a very weird knocking noise when accelerating. Noise is not there when idling or standing or when I rev the engine when standing. Its weird but its just on accelerating when I reach the desired speed and hold it there it stops or if I pull out the choke when driving it stops. Have checked all the engine mounts and steady’s and they are all fine. Had one or 2 people listen to it and they think it could be weird timing too much advance. Anyone got any other ideas.
Could it be running too lean or a carb / ignition problem or does it sound worse like mechanical. Advice please.

Thanks

Zerothree



Stage one kit

Edited by zeroasylum, 14 March 2010 - 12:56 PM.

[mini_adam]

Model:studio 2 998
Year:1980
Description of problem (please be as in depth as possible):

Went for my MOT last week and had to get my engine adjusted for emissions so asked them to tune it as well (brought it to mini specialist). It was fine until Friday morning when I went to go to work it made a very weird knocking noise when accelerating. Noise is not there when idling or standing or when I rev the engine when standing. Its weird but its just on accelerating when I reach the desired speed and hold it there it stops or if I pull out the choke when driving it stops. Have checked all the engine mounts and steady’s and they are all fine. Had one or 2 people listen to it and they think it could be weird timing too much advance. Anyone got any other ideas.
Could it be running too lean or a carb / ignition problem or does it sound worse like mechanical. Advice please.

Thanks

Zerothree



Stage one kit

i had this matey. if its like a metal on metal. i had droped a door srew down back off my front subby n it was traped between the subby and sterring rack.

can you feel it up the pedals and steering??

[zeroasylum]

Model:studio 2 998
Year:1980
Description of problem (please be as in depth as possible):

Went for my MOT last week and had to get my engine adjusted for emissions so asked them to tune it as well (brought it to mini specialist). It was fine until Friday morning when I went to go to work it made a very weird knocking noise when accelerating. Noise is not there when idling or standing or when I rev the engine when standing. Its weird but its just on accelerating when I reach the desired speed and hold it there it stops or if I pull out the choke when driving it stops. Have checked all the engine mounts and steady’s and they are all fine. Had one or 2 people listen to it and they think it could be weird timing too much advance. Anyone got any other ideas.
Could it be running too lean or a carb / ignition problem or does it sound worse like mechanical. Advice please.

Thanks

Zerothree



Stage one kit

i had this matey. if its like a metal on metal. i had droped a door srew down back off my front subby n it was traped between the subby and sterring rack.

can you feel it up the pedals and steering??

There is some vibration there. I have looked but cant see anything.

You sure it could be that.I have not opened the hood since the garage tuned it till now.

Thanks

[zeroasylum]

Model:studio 2 998
Year:1980
Description of problem (please be as in depth as possible):

Went for my MOT last week and had to get my engine adjusted for emissions so asked them to tune it as well (brought it to mini specialist). It was fine until Friday morning when I went to go to work it made a very weird knocking noise when accelerating. Noise is not there when idling or standing or when I rev the engine when standing. Its weird but its just on accelerating when I reach the desired speed and hold it there it stops or if I pull out the choke when driving it stops. Have checked all the engine mounts and steady’s and they are all fine. Had one or 2 people listen to it and they think it could be weird timing too much advance. Anyone got any other ideas.
Could it be running too lean or a carb / ignition problem or does it sound worse like mechanical. Advice please.

Thanks

Zerothree



Stage one kit

i had this matey. if its like a metal on metal. i had droped a door srew down back off my front subby n it was traped between the subby and sterring rack.

can you feel it up the pedals and steering??

There is some vibration there. I have looked but cant see anything.

You sure it could be that.I have not opened the hood since the garage tuned it till now.

Thanks

Just jacked the car up and checked nothing has fallen own.


Thanks

[mini_adam]

not got a clue then i no people sed to me it cud have been the ball joints

[zero777]

use a higher octane fuel.

[zeroasylum]

use a higher octane fuel.

It is shell fuel that is in it what I hav alwaysed used.how would changing it make a difference.
Thanks

[minidan]

could even be worn out wheels bearings.

[zeroasylum]

could even be worn out wheels bearings.

Have checked all wheel bearings and ball joints are all good and only replaced them 6 months ago. All mounts are good as well. Its weird when I accelerate it sounds like a disel engine and vibrates.

Thanks

zerothree

[bmcecosse]

If it's a tinkling/pinging sound - then it is pre-ignition (or 'pinking') caused by ignition too far advanced. If its'a rattling noise from the engine - could be knackered big ends. What's the oil pressure like ? Of course - it could just be the exhaust banging against the floor - or a broken mount at the rear of the front subby! Or the floor cracked where the mount fixes to it. Lift the carpet and examine the floor carefully.

[zeroasylum]

If it's a tinkling/pinging sound - then it is pre-ignition (or 'pinking') caused by ignition too far advanced. If its'a rattling noise from the engine - could be knackered big ends. What's the oil pressure like ? Of course - it could just be the exhaust banging against the floor - or a broken mount at the rear of the front subby! Or the floor cracked where the mount fixes to it. Lift the carpet and examine the floor carefully.

Will check floor tomorrow. Could you explain what big ends means sorrry not sure of the term.

Thanks

[bmcecosse]

The big ends - on the ends of the con-rods, little ends are in the pistons, the big ends whirl round with the crank!
http://en.wikipedia.org/wiki/Crankpin

[AndrewK]

Sorry I know this is an old topic, but I'm having a similar problem, what was the solution to the sound?