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manx trooper Newbie
Joined: 27 Nov 2013 Posts: 8 Location: isle of man
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Posted: Tue Dec 17, 2013 21:04 Post subject: EGR valve stuck open? |
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Hi guys, is it possible for an egr valve to stick open?
Reason for asking is my egr valve has been blanked off by threading a bolt down the vac pipe.
Thing is i can still here a hissing sound around that area and when i had a poke around realised the plunger shaft and the whole back of the egr is all sooted up and cruddy.
any advice would be great!
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Posted: Tue Dec 17, 2013 21:04 Post subject: Google Ads keep this community free to join! |
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eithan h Moderator
Joined: 11 Dec 2005 Posts: 8195 Location: oxfordish
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Posted: Wed Dec 18, 2013 20:05 Post subject: |
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3.0l trooper? yes mine is the same they are known to wear and therefore leak and i've got a replacement ready to go on when the rain stops! |
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manx trooper Newbie
Joined: 27 Nov 2013 Posts: 8 Location: isle of man
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Posted: Wed Dec 18, 2013 20:50 Post subject: |
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Yes 3.0, is it worth just getting a blanking plate and take the whole thing off?
Tbh its not running 100% at the mo, just seems to be no pickup after 2k revs.
Got flashcodes only code 66 popped up which I expected as the 50amp glowplug fuse is goosed and been to lazy to get plugs changed :-/
Cheers. |
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eithan h Moderator
Joined: 11 Dec 2005 Posts: 8195 Location: oxfordish
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Posted: Wed Dec 18, 2013 21:01 Post subject: |
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you can't get a blanking plate for them due to the design all you can do is pull off the vac pipe and that will leave the valve in the shut position anyway, what year is it? |
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manx trooper Newbie
Joined: 27 Nov 2013 Posts: 8 Location: isle of man
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Posted: Wed Dec 18, 2013 21:26 Post subject: |
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Oh right... So just be easier to buy a new egr valve then?
its an 02 with 84k
cheers |
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eithan h Moderator
Joined: 11 Dec 2005 Posts: 8195 Location: oxfordish
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Posted: Wed Dec 18, 2013 21:35 Post subject: |
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can do, i got mine off trooper dan on here, you could always put a sealant around the plunger hole |
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manx trooper Newbie
Joined: 27 Nov 2013 Posts: 8 Location: isle of man
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Posted: Wed Dec 18, 2013 21:51 Post subject: |
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Really stupid question time! Seal Inlet side or plunger side? Also is there anything else that can cause the symptoms my troop has without throwing the CEL on?
Cheers eithan h appologise for the stupid questions! |
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eithan h Moderator
Joined: 11 Dec 2005 Posts: 8195 Location: oxfordish
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Posted: Wed Dec 18, 2013 21:58 Post subject: |
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take the valve off and where the plunger comes out of the hole in the valve body put some sealant up there, as you got a euro 3 engine check the map sensor on the top of the manifold near the bulkhead, they are known for blocking up and causing no go.
also could be a the orps starting to play up |
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Browndoff *****
Joined: 22 Mar 2013 Posts: 513 Location: Dublin 13, Ireland
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Posted: Sat Dec 21, 2013 20:13 Post subject: |
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While it would be GREAT to remove the EGR altogether - if one could block the port from the Exhaust-Tube effectively - but it's much simpler - and more reliable - to clean up its valve-face [just like any poppet-valve] and make sure it's seating properly. You'll still have the shaft of the valve obstructing the Air-Inlet Manifold to some extent.
THEN you can disable its future functioning by removing the vacuum-tube running into the base of the EGR and sealing-off its end [to prevent air getting into the REST of the vacuum-system]. When it's no longer pouring soot into the inlet, life will improve enormously for your engine - especially if, as Eithan has said, you clean the MAP thoroughly.
The MAP tells the ECM HOW MUCH air is currently being drawn into the engine - from which it judges how much FUEL is required - so, clearly a CLEAN MAP is vital! It's easy to clean it with a twist of tissue-paper and some carb-cleaner to finish. _________________ 2002 LWB Trooper 3.0L
I've done some major repairs, including replacing half-shaft, replacing fuel-injectors etc. |
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eithan h Moderator
Joined: 11 Dec 2005 Posts: 8195 Location: oxfordish
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Posted: Sat Dec 21, 2013 21:24 Post subject: |
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The shaft is on the exhaust side on the 3.0 |
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fostri **
Joined: 19 Sep 2007 Posts: 123 Location: Iceland
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Posted: Sat Dec 21, 2013 23:52 Post subject: |
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You could also take off the exhaust manifold and make a blanking plate for the first port on it. That's the one that takes the exhaust gasses through the head to the egr valve. _________________ Isuzu Trooper 3.0 TDI 35"
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manx trooper Newbie
Joined: 27 Nov 2013 Posts: 8 Location: isle of man
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Posted: Sun Dec 22, 2013 16:17 Post subject: |
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Well guys the gasket between the egr and inlet manifold is goosed but to cause more missery whilst I was looking around we found a small hole/crack in the intercooler, so hopefully sorted the hissing and loss of power above 2k revs (if our fix works) fingers crossed!! |
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Browndoff *****
Joined: 22 Mar 2013 Posts: 513 Location: Dublin 13, Ireland
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Posted: Sun Dec 22, 2013 20:15 Post subject: |
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Hi Fostri I'm fascinated by your suggestion than one could block the exhaust used in the EGR from the EXHAUST MANIFOLD end! My only concern, is that one would have to make a new sheet metal plate [steel, perhaps?] to go between the manifold and the Cylinder-Head. It would need to have gaskets on each side of it and a set of holes to match those in the standard gaskets - EXCEPT where the exhaust-gas was 'collected' for the EGR....! THERE it would be solid and block the gas-flow to the EGR-valve.
Such a block - at the exhaust-entry-point for the EGR-System - would allow folk to remove the EGR valve altogether and put a simple plate over the hole in the Inlet-Manifold. I'd LOVE to try it! It would certainly improve the Air-Flow in the Inlet-Manifold! _________________ 2002 LWB Trooper 3.0L
I've done some major repairs, including replacing half-shaft, replacing fuel-injectors etc. |
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eithan h Moderator
Joined: 11 Dec 2005 Posts: 8195 Location: oxfordish
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Posted: Sun Dec 22, 2013 21:48 Post subject: |
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You can't remove the valve completely because of how it seals off the 2 sections in the inlet manifold, also each port on the exhaust manifd has a separate gasket so only one part would need to be made to block the egr port. |
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Browndoff *****
Joined: 22 Mar 2013 Posts: 513 Location: Dublin 13, Ireland
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Posted: Mon Dec 23, 2013 0:59 Post subject: |
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Right, Eithan - but THAT'S whats' so fascinating! If the exhaust-end were blocked successfully - then the open port into the Inlet-Manifold would hardly matter - 'cos the other end would be sealed - and the OUTER side of the Inlet-Manifold would be sealed by the new blanking-plate where the EGR-Valve had been.
The big problem to be overcome is getting the exhaust-manifold to 'seat' properly, once a blanking-plate was in place. The integrity of its gas-tightness would have to be maintained - and it could not be 'distorted' by a too-thick plate in one area only.
Still, it's an interesting idea - is it not? _________________ 2002 LWB Trooper 3.0L
I've done some major repairs, including replacing half-shaft, replacing fuel-injectors etc. |
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