martin@BBG
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Registered: 3rd Dec 03
Location: Preston, Lancashire.
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I have a 1.4 16v sport with Ecotec..
But my ecotec has been removed by its previous owner. It looks to me like a fan unit and some pipes. Is it easy to put back on? And whats the hell does it do? Apprently i've been told its been taken out to make it go faster. No flat spots etc, but the engine sounds rough compared with my mates sport ecotec (with the ecotec on! lol)
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LukeGSi
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Registered: 9th Dec 03
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 think your a little puzzled my friend
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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sounds like the egr or secondary air pump have been removed. i have removed my egr when i fitted a new exhaust manifold. my car runs better without it. adam kindness removed his aswell. easy to re.fit. ill post some pics later to se if were on about the same thing
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martin@BBG
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Registered: 3rd Dec 03
Location: Preston, Lancashire.
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Right here's a pic of my mates car and this is what im missing! I was told this was the ecotec system?
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mike16v
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Registered: 20th May 02
Location: sheffield, yorkshire
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yeah thats the EGR valve mate
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Rob H
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Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
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Thats the EGR valve mate. I can see why people would call it the ecotec system though. On the GSi's, the early engines had "Vauxhall" on the rocker covers, and had no EGR valve. Later, they changed the engine slightly to include the EGR valve, and put "Ecotec" on the rocker, like the engine above  .
As for it running rougher, My mums car seems to caugh and splutter when the EGR valve is running (On start up). Maybe its another problem that youve got?
Rob
[Edited on 28-02-2004 by Rob H]
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Wolf In Welsh Clothing
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Registered: 31st Mar 03
Location: North Wales...... Cooper S on order
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Its not the EGR its the secondary injection pump.
You don't need it if you aint got a cat.
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Rob H
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Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
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quote:
Originally posted by Wolf In Welsh Clothing
Its not the EGR its the secondary injection pump.
Yes, a secondary injection of Exhaust gasses , Hence the Exhaust Gas Recirculation. Its not really needed at all, but Vauxhall put it on so that the engine was compliant with European emission levels.
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mike16v
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Registered: 20th May 02
Location: sheffield, yorkshire
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quote:
Originally posted by Wolf In Welsh Clothing
Its not the EGR its the secondary injection pump.
You don't need it if you aint got a cat.
u sure? im sure it is the egr
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mike16v
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Registered: 20th May 02
Location: sheffield, yorkshire
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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vauxhall lad here. that is not the egr valve. the egr valve is below the inlet manifold. the area in red is the secondary air pump.
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M4tt
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Registered: 18th Apr 03
Location: Potters Bar
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what advantages do you get if its disconnected? does it do n e thing when the engines warmed up?
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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the idea behind ridding this is that engine stays cooler therefore chucks more fuel in.
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James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
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quote:
Originally posted by M4tt
what advantages do you get if its disconnected? does it do n e thing when the engines warmed up?
The EGr only works on warm up of the engine and recirc's some of the exhaust gases to reduce emissions on warm up, as it the secondary pump with as it suggests pump air in to the exhaust so it dilutes what coming out the back to look like better emissions. It doesn't not affect performance removing it, well only the weight loss. (unless you're talking full tb's etc.. then you'r junking the std management anyways)
You engine sounds ruffer probably cause it needs an oil change or is more worn than his.
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martin@BBG
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Registered: 3rd Dec 03
Location: Preston, Lancashire.
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Ok thanks guys for the help! It was much appreciated!
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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i had problem with the egr system, removed the bit u have sircled in red and now i have no problems with the egr system! dunno about any gains with it tho!
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Black Corsa SRi
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Registered: 25th May 02
Location: ---Stockport---- Drives: Pug 206 Roland Garros
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quote:
Originally posted by mike16v
quote:
Originally posted by Wolf In Welsh Clothing
Its not the EGR its the secondary injection pump.
You don't need it if you aint got a cat.
u sure? im sure it is the egr
nah its def called the secondary air injection pump. I've got one on my SRi 16v ecotec, as its asme engine as 1.4 16v sport engine, and had this same discussion with vaux. I'd always been told it was an EGR pump or something like that (egr being exhuast gas recircuatory i suppose) but its on the vaux epc and everywhere else as secondary air injection pump.
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James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
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I'll do a post on it next week
as I'm home next weekend I'll take photo's of my old inlet manifold and show you guys what the EGR looks like and the secondary air pump as there's lots of confusion about this.
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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the egr valve is a component that takes unburnt gases, or hydrocarbons, and re-circulates them into the inlet manifold to re-combust. it works any time not just on initial start up. it can work when the 02 sensor reads either to rich, and can work when driving style changes erratically. the secondary air pump is a device that re-directs air from the manifold into exhaust manifold to increase the amount of oxygen that is detected by the lambda(02) sensor. removal of the secondary air pump DOES improve performance, however only slightly. the reason for improved performance is because with it removed it isnt taking precious air from inlet-ie more air for engine.
Removal of egr valve will do nothing for performance whatsoever. this is simple to explain really. if it doesnt recirc hydrocarbons, then your getting unburnt fuel in exhaust. so 02 detects to much fuel, and alters injection rate.
basically, keep both components.
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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not that im a swat but at vauxhall college i was told that ecotec is short for'economy ecology, technology'
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James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
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quote:
Originally posted by corsabubble
removal of the secondary air pump DOES improve performance, however only slightly. the reason for improved performance is because with it removed it isnt taking precious air from inlet-ie more air for engine.
No it doesn't it has a seperate intake from the inlet for the engine, it deosn't no feed in any fromt he airbox tb inlet manifold, all the egr and secondry airpump are there for is to reduce emissions. The egr doesn't reduce hyrdocarbons specifically as the CAT takes care of that it is there to reduce nitrogen oxides the engine produces.
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Pickup
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Registered: 25th Nov 03
Location: Newcastle
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i know nothing on the matter, so cant really put my opinion on that. but, i think corsabubble works for vauxhall, so im sure he must be right?  might have picked up the thread wrong somewhere though.
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sfxer
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Registered: 23rd Aug 00
Location: devon, england
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id trust an independant mechanic over a vaux mechanic any day of the week,
no offence intended, just going on previous experience!
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AJBek
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Registered: 31st Jul 02
Location: Ayrshire
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bubblevaux is right about the red circled component beign the seconday air pump as I removed all that stuff fitting my TBs. As stated the EGR valve is part of the inlet manifold. Neither system is essential for low emissions however. My can runs TBs with no egr, secondary air or even lambda sensor and passed the MOT with readings almost identical to when all that gubbins was fitted. (a metallic racing cat was fitted however as I doubt they would have passed it without a cat). Even without the cat the emissions are still low. The ecotec engine is inherently a clean design even with TBs at idle and low load. Probably not so clean at full throttle however  As far as removing either system goes I wouldn't bother as you will get negligable performance increase and the engine management won't like it.
[Edited on 29-02-2004 by AJBek]
[Edited on 29-02-2004 by AJBek]
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
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The egr doesn't reduce hyrdocarbons specifically as the CAT takes care of that it is there to reduce nitrogen oxides the engine produces.
yeah it does-i been on the technical course for the x14xe and x16xe engines. as any engine specialist will tell u hydrocarbons are a result of unburnt fuel that are released in exhaust gases. when the o2 recognises low o2 content it opens the egr valve to include the gases from the egr into the combustion process. therefore burning excess hydrocarbons(or carbons of monoxide). the cat does stop hydrocarbons yes, however if the egr valve didnt also recylce some ull find that ur cat wont last long.
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