MattyPW
Member
Registered: 5th Feb 05
Location: Devon, UK
User status: Offline
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Hi,
My Cat is on the way out, as the car is starting to smell abit now. Was just wondering, how does that affect the fuel usage?! As my car seems to be drinking quite alot of petrol recently, wondered if it was connected at all 
Thanks
Matt
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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how do you know the cat is faulty?
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sunshine beast
Member
Registered: 7th Jan 05
User status: Offline
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mine is the same as well exhaust smells like its burning a little mine seems to be drinking a lot of petrol i was adv to change coolent temp sensore and lambda sensor but thoguth it could be to do with my cat as well
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MattyPW
Member
Registered: 5th Feb 05
Location: Devon, UK
User status: Offline
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Anybody shed some light?! 2 of us here with the same question now??
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Kurt
Member
Registered: 23rd Oct 05
Location: Hi
User status: Offline
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if the cat is bust then its letting more back pressure out, so more gas can escape, so i think it can let more air and petrol in with the reduced back pressure. u should have small power gain if the cats completely gone
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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quote:
Originally posted by kurtofcc
if the cat is bust then its letting more back pressure out, so more gas can escape, so i think it can let more air and petrol in with the reduced back pressure. u should have small power gain if the cats completely gone
but then the lambda would adjust fuelling accordingly.
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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if the cells in the cat have broken down the cat wont reduce hydrocarbons resulting in high exhaust emmissions.
my bet is its the cat. post up you failed mot results and ill be able to tell you.
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MattyPW
Member
Registered: 5th Feb 05
Location: Devon, UK
User status: Offline
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Its not failed an MOT, its just been smelling quite abit recently (smells when idleing, and you can smell it inside the car when you boot it).
Someone said that its my CAT, and its on the way out. I was just wondering if this has any effect on fuel usage, as my MPG seems to be alot worse recently 
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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there shouldnt be any abnormal smells from a broken CAT, it should in fact rattle between idle and 2000rpm since the ceramic cells break down inside
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MattyPW
Member
Registered: 5th Feb 05
Location: Devon, UK
User status: Offline
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Car just stinks of petrol if left idleing for a while, and when you boot it, you can smell the same inside the car
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carnuts
Member
Registered: 28th Aug 05
Location: Hertfordshire
User status: Offline
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does not sound like the cat the cat will only smell when the car is over fueling as said previously the cat would rattle not smell. get the temp sensor and lamba sensor checked
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RKS
Member
Registered: 2nd Mar 04
Location: Gloucestershire UK
User status: Offline
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quote:
Originally posted by MattyPW
Car just stinks of petrol if left idleing for a while, and when you boot it, you can smell the same inside the car
That sounds like a petrol leak matey
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