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Old 30 January 2006, 11:59 AM
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Newbie_Scooby
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Default Exhaust Popping

Hey, just a quick one like

sometimes when changing gear after quick acceleration my car pops from the exuast! it sounds wicked, just wondering if anyone knows how to do it as it seems to happen when it wants lol

steve
Old 30 January 2006, 12:05 PM
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bobthebodger
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Yeah mines doin this since i fitted my jap style magnex.


Bob
Old 30 January 2006, 12:07 PM
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Peanuts
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its igniting the unburnt fuel in your exhaust.
happens more than likely when the exhaust is hot.
it means you are running rich
Old 30 January 2006, 12:08 PM
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is that a bad thing??
Old 31 January 2006, 09:09 PM
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rmtypeR
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running rich is better than lean... too much fuel means you'll make less power, get worse MPG and chuck out more pollution, but running lean can cause det which can do nasty things like melt pistons.

It's more likely to pop (and maybe even flame) if the exhaust has been de-catted.... and that's what I'm hoping when I get my decat fitted next week!
Old 31 January 2006, 09:32 PM
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scooby_matt
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Mine pops and bangs all the time, sounds
Old 31 January 2006, 09:47 PM
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typerchris
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i have a type r and mine pops and bangs like its gonna blow the street up sounds fantastic and i get flames all the way up the v6 spoiler really cool if your in a narrow street when everyone ducks down because it sounds like a shotgun
Old 31 January 2006, 09:56 PM
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RRH
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Must admit mine was popping and banging like a b astard the other morning on the way to Oulton, partly because of Bobs map and partly down to two bottles of OB. Mine has no cats whatsoever, which, as pointed out above, does help. Throws rather a lot of flames too.
Old 31 January 2006, 11:28 PM
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hall84
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i tend to find i cant make it pop more by gently tapping the throttle as the revs start dropping. sounds awsome, jus like a shotgun!!
Old 31 January 2006, 11:37 PM
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SC008Y
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Originally Posted by rmtypeR
running rich is better than lean... too much fuel means you'll make less power, get worse MPG and chuck out more pollution, but running lean can cause det which can do nasty things like melt pistons.

It's more likely to pop (and maybe even flame) if the exhaust has been de-catted.... and that's what I'm hoping when I get my decat fitted next week!
mine has also been poping since I have had it and it will not allow me to pass the MOT emission test. I have taken the car back 3 times for retesting it and it is simply not passing.

Does anyone have any advice how I can sort it out, its drinking too much petrol but does have a cat converter.

Cheers,
SC008Y
Old 31 January 2006, 11:43 PM
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hall84
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has it still got both cats?
Old 01 February 2006, 12:07 AM
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tarmac terror
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Originally Posted by SC008Y
mine has also been poping since I have had it and it will not allow me to pass the MOT emission test. I have taken the car back 3 times for retesting it and it is simply not passing.

Does anyone have any advice how I can sort it out, its drinking too much petrol but does have a cat converter.

Cheers,
SC008Y
Could the garage's test kit be in need of calibration? May be worth trying an alternative garage...

TT
Old 01 February 2006, 09:07 AM
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doug2507
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One of my mates had the same problem. Think the garage fitted a std ecu to get the right figures then changed back to his 'chipped' one. Think there was a thread on it a few weeks back. Might be in the Scotland section.
Old 01 February 2006, 09:29 AM
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Hopefully i will have my full decat fitted soon! Got thinking what is going to be like!
Old 01 February 2006, 06:19 PM
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SC008Y
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Originally Posted by hall84
has it still got both cats?
I thought there is only suppose to be one centerbox and the normal backbox
Old 01 February 2006, 08:46 PM
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rmtypeR
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There's one in the downpipe and one in the centre. The downpipe cat is the big one and so if that's been removed then there's still a chance it will fail the MOT even with the centre one still there.
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