Saab 9000 aux drivebelt thrown - advice please

[That Daddy]

No sorrythink you have another issue there.

[Max Turbo]

That Daddy said:

Careful those idlers fail quicklyi have seen lots of em.

Oh ok!! I shall give the friendly garage a call tomorrow and see when I can book it in to be replaced. The whole reason I didn't replace the belt or at least investigate doing it myself is because I am super busy at the moment.

Having a pulley detonate and taking a new belt with it, whilst 400 miles from home is just something that would tug.

To be honest, cant complain. The car has been dirt cheap (read: maintenance free) since I bought it! By far the cheapest car I have ever had

M

[Boosted LS1]

That Daddy said:

No sorrythink you have another issue there.

Thanks. I had 2 tyres changed and it started when I fired up and left the tyre place. Car runs well though so I'll just keep on running it Ever so weird.

[GreenV8S]

Boosted LS1 said:

Do they make the engine vibrate when on the way out? My 9000 vibrates like the bearings are shot some days, yet is smooth as silk on others and it started doing this all of a sudden for no obvious reason. When it's bad even the wing mirrors are vibrating. I've checked everything but can't find a fault, even the mot tester can't find a fault.

Sounds like either a misfire or something causing severe cycle-to-cycle variation.

How's the fuel supplied in that engine? If it's EFI and assuming it's batch injected then it could be something silly like the FI starting up in a random phase relative to the engine cycle, and some minor fault making it more sensitive to the fuel timing than normal. Or that could be complete bs and it's just a loose plug lead.

[Boosted LS1]

GreenV8S said:

Boosted LS1 said:

Do they make the engine vibrate when on the way out? My 9000 vibrates like the bearings are shot some days, yet is smooth as silk on others and it started doing this all of a sudden for no obvious reason. When it's bad even the wing mirrors are vibrating. I've checked everything but can't find a fault, even the mot tester can't find a fault.

Sounds like either a misfire or something causing severe cycle-to-cycle variation.

How's the fuel supplied in that engine? If it's EFI and assuming it's batch injected then it could be something silly like the FI starting up in a random phase relative to the engine cycle, and some minor fault making it more sensitive to the fuel timing than normal. Or that could be complete bs and it's just a loose plug lead.

Thanks Peter, it feels more like the big ends or mains rumbling away but they were replaced some time back. No plug leads on these cars and the fuel is an injector per runner. Revs don't drop when it plays up. I can live with it as I don't think it's a terminal problem but it's annoying when it happens. I'm waiting for it to develop as they say