strong petrol smell from exhaust all the time mk4 1.4

shauni boi · Post by **shauni boi** » Mon Jul 16, 2007 8:16 pm

im have noticed recently im getting a petrol smell comin out the exhaust it smells like the burnt smell you get from the catalyst usesally i onli get it wen im flooring it but now im getting alll the time i can smell it as soon as i open the window its 100% cummin from the exhuast. any reason y?

things i have replaced

throttle body
02 sensor
temp sensor

all these parts were changed over 6 months ago.

warrmr · Post by **warrmr** » Fri Jul 20, 2007 4:35 pm

engine breather,

have a look under your airbox there should be a pipe comeing from the back of the engine towards to top. and it should go inot the bottom of the airbox. check that if its not that then i havent a clue..

Bepe · Post by **Bepe** » Sat Jul 21, 2007 10:23 am

is there any signs of leakages? obvious things?

bstardchild · Post by **bstardchild** » Sat Jul 21, 2007 8:41 pm

shauni boi wrote:im have noticed recently im getting a petrol smell comin out the exhaust it smells like the burnt smell you get from the catalyst usesally i onli get it wen im flooring it but now im getting alll the time i can smell it as soon as i open the window its 100% cummin from the exhuast. any reason y?

things i have replaced

throttle body
02 sensor
temp sensor

all these parts were changed over 6 months ago.

Silly question but whats your mpg like?

shauni boi · Post by **shauni boi** » Thu Dec 13, 2007 10:44 am

my mpg is not good im only getting just under 30 mpg!

MintySE · Post by **MintySE** » Thu Dec 13, 2007 12:33 pm

when mine was like that i found it was the fuel lines seaping out @ the top
never got chance 2 replace them unfortunatly

Shabazmo · Post by **Shabazmo** » Thu Dec 13, 2007 7:03 pm

I have a strong small of petrol on my 1.6ltr AEE engine polo 1997. Checked the breather pipe and found it had come off the air filter housing. Hope this cures the problem.

BIG4244 · Post by **BIG4244** » Thu Dec 13, 2007 10:52 pm

my 1.4 AEE has worn piston rings, causing the combustion gasses pass the rings and pressurise the block, which causes a strong smell of petrol/oil/exhaust coming from the crankcase breather, and if the oil seperator becomes blocked itl just start releasing the gasses to atmospher, hence the smeel, well that was in my case anyway

shauni boi · Post by **shauni boi** » Tue Jan 15, 2008 10:15 pm

sorry guys but the problem was sorted long time ago but i jst forgot to put it on on the fourm.

whai i did was replaced the lambda sensor which solved the problem and it improved the mpg aswell.

Shabazmo · Post by **Shabazmo** » Tue Jan 15, 2008 10:41 pm

Just to confirm that I cured the problem when I re-attached trhe bottom pipe to the air filter housing.

JarnoVWPolo6N · Post by **JarnoVWPolo6N** » Wed Jan 16, 2008 10:47 am

BIG4244 wrote:my 1.4 AEE has worn piston rings, causing the combustion gasses pass the rings and pressurise the block, which causes a strong smell of petrol/oil/exhaust coming from the crankcase breather, and if the oil seperator becomes blocked itl just start releasing the gasses to atmospher, hence the smeel, well that was in my case anyway

You really need to watch out for this!!! When experiencing more "blow-by" then normal (blow-by is air-fuel mixture entering the carnkcase slipping past the piston rings) then the oil get's "lean" due to the fuel being added to it. When the oil get's too "lean" it doesn't lubricated good enough as it was intended, making your bearings wear out far faster then supposed! With whatever kind of trouble that can arise from that

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strong petrol smell from exhaust all the time mk4 1.4

strong petrol smell from exhaust all the time mk4 1.4

Re: strong petrol smell from exhaust all the time mk4 1.4