egr valve cleanup
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Discussion

k15tox

Original Poster:

1,680 posts

203 months

Monday 31st October 2011
quotequote all
i have the week of work so i decided to see what all the hoo har was about with sooted up egr valves.

took the egr valve off and gave it a good clean with carb cleaner.

the bloody thing was coated in carbon, the car has only done 48k!

anyway car seems to feel a bit smoother now

while i was at it a noticed the intake manifold was also coated, so im thinking about giving it a clean up.

to do this i will have to take it off which seems pretty straightforward.

have any off you guys attempted this?

i seriously think there is more power and smoother running to be had as the manifold has got a good coating on it, its bloody awful!

problem is it will probably be the same again after 10k miles, but i like messing about so i could do it as a yearly job!

Oilchange

9,525 posts

282 months

Monday 31st October 2011
quotequote all
You know you can remove it completely? Blank the vacuum hose and replace the valve with a bit of induction pipe and a couple of hose clamps. Then block the exhaust inlet pipe so the exhaust gasses go where they are designed to, out the exhaust pipe.
There must be a mod for your car out there on an Alfa forum.
I did this on my wifes Rover 75 cdti, its ultimately a pointless piece of emissions rubbish, lets face it...

k15tox

Original Poster:

1,680 posts

203 months

Monday 31st October 2011
quotequote all
Oilchange said:
You know you can remove it completely? Blank the vacuum hose and replace the valve with a bit of induction pipe and a couple of hose clamps. Then block the exhaust inlet pipe so the exhaust gasses go where they are designed to, out the exhaust pipe.
There must be a mod for your car out there on an Alfa forum.
I did this on my wifes Rover 75 cdti, its ultimately a pointless piece of emissions rubbish, lets face it...
yeah there is a blanking mod which i may consider doing, you also need the software to delete the egr fault code.

are there if any drawbacks to removing it? from what i can see all it does is coat the whole intake system in ste, boost pipes intercooler etc etc, bloody awful!

Oilchange

9,525 posts

282 months

Thursday 3rd November 2011
quotequote all
The drawback is the 'Greenies' will think you've killed a whole family of Polar bears.
Can you live with that?


Seriously though, its an emissions thing to get the car(engine) Euro 3/4/5/6/3862 compliant...

I had a few of these daft devices on my Esprit, purely to get past Californian emission regs. (I live in Wiltshire???)
It involved putting an almost closing valve on the exhaust and a throttle jacking device so when the valve was (almost)closed it didn't stall. This was done to create a back pressure to warm the catalytic converter up quicker (and so bring it up to efficiency) so the emissions were below a set point after a certain amount of time from a cold start.
All this meant was a rattly valve strangled the engine, made it over rev and ultimately was a pain in the brain.
Ripped out the valve, plugged the vacuum hose, cable tied the throttle jack. gave the valve to some poor chap in California who actually needed it to keep his car on the road.
What a ballache...

k15tox

Original Poster:

1,680 posts

203 months

Friday 4th November 2011
quotequote all
Oilchange said:
The drawback is the 'Greenies' will think you've killed a whole family of Polar bears.
Can you live with that?


Seriously though, its an emissions thing to get the car(engine) Euro 3/4/5/6/3862 compliant...

I had a few of these daft devices on my Esprit, purely to get past Californian emission regs. (I live in Wiltshire???)
It involved putting an almost closing valve on the exhaust and a throttle jacking device so when the valve was (almost)closed it didn't stall. This was done to create a back pressure to warm the catalytic converter up quicker (and so bring it up to efficiency) so the emissions were below a set point after a certain amount of time from a cold start.
All this meant was a rattly valve strangled the engine, made it over rev and ultimately was a pain in the brain.
Ripped out the valve, plugged the vacuum hose, cable tied the throttle jack. gave the valve to some poor chap in California who actually needed it to keep his car on the road.
What a ballache...
blanking plate arrived today!

going to blank it and give the inlet a good clean, angel tuning (whose map i have on my car) said if i come to them they will delete the fault code for free.

will the car will run ok blanked to get down there? should only be a code thrown up but no change to the running right?

Oilchange

9,525 posts

282 months

Friday 4th November 2011
quotequote all
If you have any doubts take it to Angel first, then fit the blank.

Also, stick a bit of epoxy on a screw then plug the vacuum line with it and tie wrap it to something.
should be fine.

All the pipe is doing is sending some sooty exhaust into your inlet manifold instead of down the exhaust pipe. Not exactly what it was designed for really!

Edited by Oilchange on Friday 4th November 17:18

k15tox

Original Poster:

1,680 posts

203 months

Friday 4th November 2011
quotequote all
Oilchange said:
If you have any doubts take it to Angel first, then fit the blank.

Also, stick a bit of epoxy on a screw then plug the vacuum line with it and tie wrap it to something.
should be fine.

All the pipe is doing is sending some sooty exhaust into your inlet manifold instead of down the exhaust pipe. Not exactly what it was designed for really!

Edited by Oilchange on Friday 4th November 17:18
Don't think there is a vacum pipe, the egr appears to be electronically controlled, a plug on the back that controls a solanoid to open and close the valve.

Thanks for the advice though, looking forward to blanking the thing off another thing less to go wrong!