2.2 Ecotec has an external EGR valve.
Anyone Blocked off their EGR
- Thread starter Brando
- Start date
2.2 Ecotec has an external EGR valve.
Diesels don't require a cat to get through an M.O.T anyway. So putting a straight through pipe on one isn't an issue
. Even my 94 mx5 doesn't because it's an import and subject to the old regulations up to 94, 92 on UK cars . That will be coming off soon when I get round to ordering the larini . One issue at a time though. EGR this weekend and discs and pads on the rear of the Van .
Soldato
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Aye long as it passes the smoke test 
I used to enjoy putting my tuned Pulsar through the MOT test. It was allowed through year after year with no CAT because 'Pulsar' was not on the MOT testers car list
I used to enjoy putting my tuned Pulsar through the MOT test. It was allowed through year after year with no CAT because 'Pulsar' was not on the MOT testers car list
Associate
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How do you fool the ECU into thinking the lambda sensor is doing something sensible if there is no cat?
Knew you'd make that point
It will be used on engines without variable valvetrain though to be fair. OEMs much prefer VVti and such like to optimise timing to keep cylinder peak pressures and temperatures lower, as it's these conditions that NOx forms in.
Soldato
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2.0 HDi Inlet valve.
Stolen off a thread I remembered @ 306.net
Eeeew, I take it this is what happens with the default config?
I don't see why all the manufacturers don't just put VVT on the exhaust cam for the recyc.
Probably no lambda sensor on early diesels
Regardless though the Lambda sensor will be before the cat. Only OBDII vehicles have a secondary lambda sensor, this purely monitors the AFR after the cat.
If the difference is not enough then the ECU will flash up a check engine light, possibly with a cat malfunction light. As no difference in AFR suggests the Cat is not removing any excess HC in the exhaust.
No point on a diesel.
Diesel valves will always look pretty bad anyway, they don't have the benefit of fuel washing them clean. Mind you FSi gasolines face this problem too. Blowby gases combined with engine oil causes them to gum up affecting flow over the valve.
My car and van have the lambda sensor before the cat so it's not really an issue and they also measure Oxygen percentage in the exhaust gases.
http://en.wikipedia.org/wiki/Oxygen_sensor
However, some production cars use lambda sensors before and after the Cat and I have no idea why, sorry
?Hopefully someone else will know
Simon got in first: Cheers Simon that makes sense. I was wondering what the point was of feeding two sensors into a closed loop system
.
Caporegime
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Further reading indicated not all 1.8T's have this, its actually a combi valve.
Looks like this :
Since my 1.8T setup was designed with AWD in mind my engine is the other way round from yours and this valve sits towards the bulkhead
Caporegime
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No idea mate, mine is an AWT.
I think its classed as a 'Combi valve', its easy enough to spot just look for a 'tin can'
Just learnt my charcoal canister is in the passenger side wheel arch, no wonder i had problems finding it!
I think its classed as a 'Combi valve', its easy enough to spot just look for a 'tin can'
Just learnt my charcoal canister is in the passenger side wheel arch, no wonder i had problems finding it!
Must be a different layout to mine then, mine is driver side above the arch.
Noisy little thing!
Caporegime
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Yea your is transverse mine is longitudinal
Yea your is transverse mine is longitudinal
Aaaaah
So anyway, worth blocking the "combi valve" on the 1.8t?