Hi all, Just a quick question regarding the EGR valve. Some threads state to disconnect the electrical plug and some state only to disconnect the top hose on the EGR and block it off. Ive disconnected the hose and blocked it off and it seems to have made a difference in performance and feels alot more responsive to the throttle.Have i done this task correctly or can you advise me otherwise.
P.S travelled to scotland and back in my liteace FXV 2.0 TD 4X4 and covered about 1500km in the space of 4 days see didn,t miss a beat and was a pleasure to drive.So if there anybody out there thinking of buying one ,do it as im sure you,ll enjoy the vehicle like i do.
- (#13135) stuart-west-wales , 1 Sep 04 13:34
yes...leave the wiring (to keep the ecu informed)....you have done it right
- (#13135) chris turner, 1 Sep 04 15:56
This interests me because for a year or more I've had the hose off and good results, as described above, but now am rebuilding the engine and am amazed at all the carbon deposits. We've been warned that the EGR valve may not seal well and some exhaust may leak through so I intend to block the route off with blanking plates and leave off the whole EGR system. But recalling this advice about the electrical side I wondered if I really need to install the vacuum valve just to terminate the wiring? Anyone left the wiring unterminated and thinkthat it makes no difference?
- (#13135) Dave Mason (Sussex), 2 Sep 04 00:49
Dave
I've removed the vacuum device, vacuum pipes and electrical connections and fitted blanking plates to both the inlet and exhaust manifolds. Slight improvement on performance but the major incentive for me was the build up of gunge in the inlet manifold - that was frightening!
- (#13135) Ian Dunse (Derbs), 2 Sep 04 01:09
Oh and to answer your question directly - disconnection of the electrical connector made no difference.
- (#13135) Ian Dunse (Derbs), 2 Sep 04 01:13
As Ian said. Some of the later diesels (like Chris's Hiace with the electronic pump, VWs, HDIs etc)can sense both the solenoid valve and indeed the actual EGR flow, so fault codes CAN be a possibility. But not on a townie...
- (#13135) David Miller, 2 Sep 04 01:37
Last year before the MOT, I plugged the vacuum tube and disconnected the electrical connector. The smoke test came in at 5.5 On the advise of a diesel specialist I reconnected the electrics and the smoke test went down to just under 2.
I don't know exactly how the valve works, but it seems that it needs the vacuum to operate at all, and this is controlled by the electrics. If the electrics don't work, then I guess there is a possibility that the valve wont seal shut and will allow exhaust gas to leak through.
If you want to prevent the valve from working, then plugging the vacuum tube is the only thing you need to do. If you want to remove it, or totally disable it, then as Ian says, you will need to fit blanking plates to either end to prevent leakage once the electrics are disconnected. I recall that Dave Miller completely removed the EGR valve from his van with no adverse results.
- (#13135) dave Bright (Bournemouth), 2 Sep 04 01:40
Thanks for the information guys,much appreciated. Just a thought ,ive pulled the hose completely of the top of the valve and plugged it. Does the top of the EGR also require plugging as well. ?
- (#13135) Stuart - West - Wales, 2 Sep 04 03:37
No the pipe does the business, the valve is effectively rendered inactive (off) once the pipe has been disconnected.
- (#13135) Ian Dunse (Derbs), 2 Sep 04 04:12
I would say that you must NOT plug that rigid connection pipe on top of the EGR valve, leave it open to the atmosphere. After an early test which I did with that pipe effectively blocked I removed the plug and there was a noticeable hiss, as if pressure had built up somewhere inside - not surprising with temperature differences - and unless air can move freely in and out there I'd say there's a risk that under some circumstances a partial vacuum could be produced which would open the valve.
- (#13135) Dave Mason (Sussex), 2 Sep 04 05:03
hi sorry to bother you all but im completely confused as to were vac pipes go maybe its just me cause its getting late but the posting on http://mpvi.net/ia/ia005462.htm seems to contradict its self there seems to be 3 different opinions as to were the vac pipes go,no disrespect to ian dunse as regards his explanation +photo but is ther a clearer picture of the layout of these pipes? i cant seem to see most of the letters (maybe its my colour blindness)as i said no disrespect intended... with regards to egr valve is it necessary to have pipe "L"fitted at all as this only seems to go to"J" which in turn goes to"K"EGR?which everybody says to disconnect or is this me reading everything wrong?mine is only a 2wd 2.0td masterace 1991 is the vacpipe setup different? while im on a big thankyou to dave mason for temp gauge mod its working a treat. thanks to all ,hope this post doesn't confuse you all as much as i am cheers john
- (#13135) john williamson, 6 Oct 04 23:35
John
simply disconnect and block the vac pipe at k that goes to the EGR valve. Double over and crimp with a small cable tie or something.
- (#13135) Ian Dunse (Derbs), 7 Oct 04 04:43
Is it possible that my Townace doesn't have an EGR? For the life of me I can't find one. It is an 89 diesel 4x4 aut with a 2c-t. Thanks, lee
- (#13135) lee laskin, 10 Oct 04 19:19
Well, either someone's been off and away with it in the night already, or your townie/ it's engine are pre- 08/88,...
Or it's a manual?
- (#13135) David Miller, 10 Oct 04 23:06
I am about to replace my exhaust manifold and am contemplating fitting a blanking sheet between the manifold and the pipe leading to the EGR valve. Is this in line with current thinking or does the EGR have any positive uses.
- (#13135) Robin, 20 Oct 04 14:53
Yes. No. Read the debate on Ace Answers, Fuel System, Exh. gas recycling.
- (#13135) Dave Mason (Sussex), 21 Oct 04 02:58