Technical Sparks out of exhaust

[david295]

i got stopped in my car by another driver, and was told sparks were coming out of my exhaust,
the only thing i have done on my car before this started was, new air filter, oil change, and new plugs Bosch Super 4 Spark, also i have started using tescos Tesco's premiumMomentum 99 petrol,,,, what would cause this???

 

[bredsticz]

Sparks from your exhaust :S

You sure it's not blue smoke or a backfire?

 

[david295]

Sparks from your exhaust :S

You sure it's not blue smoke or a backfire?

no defo sparks

 

[bredsticz]

Unless it was really due a service and it's burning any carbon depostits inside the exhaust.

If not check the inside of the backbox. The muffling inside that can start to come out when you need a new box and if it gets hot enough could create orange sparks

Have you seen it for yourself?

 

[david295]

Unless it was really due a service and it's burning any carbon depostits inside the exhaust.

If not check the inside of the backbox. The muffling inside that can start to come out when you need a new box and if it gets hot enough could create orange sparks

Have you seen it for yourself?

i've seen sparks my self, also the exhaust is only a month old, its never been serviced b4

 

[bredsticz]

Unless it was a bad exhaust to start with. I just remember being ona friends off road bike one time and all the muffling from the exhaust was flying right out the back of it

It shouldn't be caked with carbon deposits if it's only a month old unless you're engine was running REALLY rich. Anyone else got any ideas if it's not what I mentioned.

Can you describe the sparks exactly though? What colour and coming from inside the exhaust?

 

[david295]

Unless it was a bad exhaust to start with. I just remember being ona friends off road bike one time and all the muffling from the exhaust was flying right out the back of it

It shouldn't be caked with carbon deposits if it's only a month old unless you're engine was running REALLY rich. Anyone else got any ideas if it's not what I mentioned.

Can you describe the sparks exactly though? What colour and coming from inside the exhaust?

orange sparks, shooting out the tail pipe, there is no back firing at all, just the sparks

 

[bredsticz]

orange sparks, shooting out the tail pipe, there is no back firing at all, just the sparks

Yeah I think that's the muffling coming out. Back box or mid silencer is fecked.
If it's only a month old you should have warranty?

I don't know if the inside of the cat can break up and cause it aswell though.
If you can't see by looking inside the tail pipe then if you're able, remove the backbox and see if it still does it from the mid silencer, if so remove that and see if it does it from the cat.
It's the only way I can think of to know for definate which it is. If they are coming out pretty fast and look 'fresh as they are coming out I'd suspect hte backbox. Although the pressure from the exhaust may be enough to force it out even from the mid silencer.

It will get worse the faster you go but if it's at slow speeds aswell I'd still say backbox

 

[mcjacko1987]

Yeah I think that's the muffling coming out. Back box or mid silencer is fecked.
If it's only a month old you should have warranty?

I don't know if the inside of the cat can break up and cause it aswell though.
If you can't see by looking inside the tail pipe then if you're able, remove the backbox and see if it still does it from the mid silencer, if so remove that and see if it does it from the cat.
It's the only way I can think of to know for definate which it is. If they are coming out pretty fast and look 'fresh as they are coming out I'd suspect hte backbox. Although the pressure from the exhaust may be enough to force it out even from the mid silencer.

It will get worse the faster you go but if it's at slow speeds aswell I'd still say backbox

could thread from the exhausts braided flexi hose cause a spark tho? say its fraided inside when new backbox was put on with due force say. then bits of thread maybe heated up enough would glow and the pressure would shoot the bits of thread down the pipe????? just theory

 

[bredsticz]

could thread from the exhausts braided flexi hose cause a spark tho? say its fraided inside when new backbox was put on with due force say. then bits of thread maybe heated up enough would glow and the pressure would shoot the bits of thread down the pipe????? just theory

Not really, the flexi is made of material that's too thick to just break up like that and you'd really notice it. The muffling inside and exhaust is very similar to cotton wool but made of very fine metal

 

[mcjacko1987]

Not really, the flexi is made of material that's too thick to just break up like that and you'd really notice it. The muffling inside and exhaust is very similar to cotton wool but made of very fine metal

thought the braid may have very mine metal??? its fine enough to hurt like *** lol

 

[bredsticz]

thought the braid may have very mine metal??? its fine enough to hurt like *** lol

It is fine but it's like comparing cotton wool to fuse wire

 

[mcjacko1987]

It is fine but it's like comparing cotton wool to fuse wire

yeah guess so