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flames coming out of muffler whe slowing down

jamiesc - January 22nd, 2012 at 10:21 PM

okay so today i took the bug out and was running perfect and when i was slowing down i could hear it blowing flames when i was slowing down but i had stoped in a friends place for a few hours and when i left it the weather was alot colder then befor but it wasnt blowing flames and and kind off back firing what could it be ?

beetleboyjeff - January 22nd, 2012 at 10:28 PM

Usually caused by an exhaust leak.

68AutoBug - January 22nd, 2012 at 10:42 PM

Quote:

Originally posted by jamiesc
okay so today i took the bug out and was running perfect and when i was slowing down i could hear it blowing flames when i was slowing down but i had stopped in a friends place for a few hours and when i left the weather was alot colder then before but it wasnt blowing flames and and kind off back firing what could it be ?

Air cooled VWs hate any air leaks.. in exhaust or inlet side --

so, looks like You have an air leak ---

check all exhaust joins etc.. where its bolted on..
and see if You can tighten them..
You may need new exhaust gaskets
exhaust cement isn't recommended, once it dries it usually falls off.. You can use silastic silicon on the exhaust joints..
just make sure the metal is shiney clean... use a wire brush..

cheers

LEE

jamiesc - January 22nd, 2012 at 10:51 PM

thats what i thought also its the exhaust flange but i just replace the about two months ago but i did scrapp my exhaust on my driveway last week

and for some reason ive noticed for an unknown reason the left exhaust flange wears out really quick but ill have a check tomorrow and see if it stops

and would anybody have an idea how much it is to get my hubs machined and drilled out to a five stud
cheers jamie

narumi - January 22nd, 2012 at 10:55 PM

mine was like that and as everyone said, exhaust leak
and i got some random asked if i had a suby engine in because it pop flame lol
I fixed the leak and much later on a new engine with good stuff I tried to replicate a leak but got no flame

jamiesc - January 22nd, 2012 at 11:02 PM

Quote:

Originally posted by narumi
mine was like that and as everyone said, exhaust leak
and i got some random asked if i had a suby engine in because it pop flame lol
I fixed the leak and much later on a new engine with good stuff I tried to replicate a leak but got no flame

haha i no what you mean narumi but what scares me is pulling up next to the fuel pump with a flame blowing out haha

68AutoBug - January 22nd, 2012 at 11:23 PM

V8 supercars design their cars to do that...

LEE

modnrod - January 23rd, 2012 at 06:15 AM

Quote:

Originally posted by jamiescwhen i was slowing down i could hear it blowing flames

Cool!

Joel - January 23rd, 2012 at 06:17 AM

Bah, just enjoy it
People pay good money to make their cars do that.

vlad01 - January 23rd, 2012 at 11:55 AM

Quote:

Originally posted by 68AutoBug
V8 supercars design their cars to do that...

LEE

no they didn't

Most race cars do if you haven't noticed. :lol:

its just unburned fuel buring in the exhaust.

jamiesc - January 23rd, 2012 at 01:12 PM

haha there not big flames just like 1 foot haha

Bizarre - January 23rd, 2012 at 04:27 PM

I am guessing it will be those shitty clamps on your heater boxes / J tubes
The tubes wear and is hard to get the clamps to clamp.
On top of that the clamps are just rubbish.

Best way to fix it is the weld flanges on.
That is what I did.

jamiesc - January 23rd, 2012 at 08:59 PM

Quote:

Originally posted by Bizarre
I am guessing it will be those shitty clamps on your heater boxes / J tubes
The tubes wear and is hard to get the clamps to clamp.
On top of that the clamps are just rubbish.

Best way to fix it is the weld flanges on.
That is what I did.

thanks for the tip bizarre im might just do a quick fix as in going rebuild the flea later this year repaint bigger new engine, gearbox, suspension brakes and also new interior cant wait till i starts it

Mr Muppet - January 24th, 2012 at 08:16 AM

I had flames blowing out of my exhaust on idle and low end revs, and it turned out to be carbie issues.
People said to me it was air leaks in the exhaust or intake manifold, it turned out to be crap in my idle jets (twin webers)
Its a process of elimination, sometimes a long slow process. Good Luck

VolksVair - January 24th, 2012 at 02:00 PM

CHECK YOUR TAPPET CLEARANCES

jamiesc - January 24th, 2012 at 05:01 PM

yeah i had real bad tapet clearence last month it was no clearence i put bigger tapets in mine and it ran really good since

lohoon - January 24th, 2012 at 06:46 PM

I had a convertable with a old rusty exhaust and on down shifts and slowing down (overrev) she would bang backfire like uncle buck. Everyone in town used to comment on it. I couldnt bring myself to fix it. I sold it like that!

jamiesc - January 26th, 2012 at 08:13 PM

haha thats cool i like that it i might call my next vw uncle buck cause you said that