Anty
Premium Member
Registered: 19th Mar 08
Location: droitwich
User status: Offline
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what do they do?
As ive noticed my car is burning alot of fuel.. 
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SR91
Member
Registered: 21st Jun 08
Location: Lancashire.
User status: Offline
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Heat the cat up
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Matty W
Member
Registered: 31st Jan 11
Location: Ashton-in-Makerfield, Greater Manchester
User status: Offline
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EGR stands for exhaust gas re-circulation.
when its open, it lets some of the exaust gasses back into the inlet manifold to be re-burnt, to take out any unburnt fuel particles and such. Its for emissions reduction. if its stuck closed for example, you would use a slight amount more fuel as its not re using the vapour that wasnt burnt. if it was stuck open, there would be a lack of power at low revs as your always burning dirty mixture
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danbo
Member
Registered: 1st Jul 08
User status: Offline
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the thing that heats the cat up is the SAI i thought ? and as he said EGR exhaust gas recirculation for emissions
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Matty W
Member
Registered: 31st Jan 11
Location: Ashton-in-Makerfield, Greater Manchester
User status: Offline
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yeah the secondary air injection valve blows clean air into the exaust manifold to get the cat up to operating temperature.. thats also for emissions though, wouldnt imagine it would cause it to use fuel
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danbo
Member
Registered: 1st Jul 08
User status: Offline
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could try servicing it and using shell super unleaded or a cleaner or something for abit heard it cleans it out abit and some people said it runs better again
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Jed D
Member
Registered: 15th Mar 11
Location: Durham
User status: Offline
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so does blanking the egr actually work, i didint think it would, ANY PROOF?
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Matty W
Member
Registered: 31st Jan 11
Location: Ashton-in-Makerfield, Greater Manchester
User status: Offline
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would just mean that your always supplying a "clean" mixture, more fuel vapour in th exaust, more likely to spit flames
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Jed D
Member
Registered: 15th Mar 11
Location: Durham
User status: Offline
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sounds cool i suppose but are there any gains from it mate?
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Matty W
Member
Registered: 31st Jan 11
Location: Ashton-in-Makerfield, Greater Manchester
User status: Offline
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ive never seen it done so i wouldnt know... no point doing it to my 12 valve. my guess is that if it did have any improvment, it would only be slight and hardly noticable, if nothing at all, unless it was tuned to run on a higher octane racing fuel
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AlexW
Member
Registered: 25th Oct 08
Location: Essex
User status: Offline
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Wrong actually, Most of the time the EGR is closed, Thus meaning it is a "clean" mixture, Its only sometimes it opens, Its when they get stuck in the open position they cause problems.
There isnt any gain in blanking, Its just to stop it from causing problems, Not really worth it unless fitting a powerbox on a baby xe or if you have issues.
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Jed D
Member
Registered: 15th Mar 11
Location: Durham
User status: Offline
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quote:
Originally posted by AW06
Wrong actually, Most of the time the EGR is closed, Thus meaning it is a "clean" mixture, Its only sometimes it opens, Its when they get stuck in the open position they cause problems.
There isnt any gain in blanking, Its just to stop it from causing problems, Not really worth it unless fitting a powerbox on a baby xe or if you have issues.
didn't think it made a difference. i here loads of storeys about it adding 50bhp and that..
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Matty W
Member
Registered: 31st Jan 11
Location: Ashton-in-Makerfield, Greater Manchester
User status: Offline
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quote:
Originally posted by AW06
Wrong actually, Most of the time the EGR is closed, Thus meaning it is a "clean" mixture, Its only sometimes it opens, Its when they get stuck in the open position they cause problems.
.
Pretty sure that's similar to what I said earlier
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