Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: moggy on 08 October 2015, 19:07:46
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Hi all need some advice please.Changed the HBV the other day to see if it would increase the cabin heat.It made no difference at all,so i am assuming my H/matrix is blocked so i will try to sort that out.The problem i have now is after putting everything back together,i have an air leak from some where.At idle it wont stay stable and keeps hunting,above and below 500rpm.It was fine before i pissed about with it,and i have not removed any vac pipes to my knowledge.How is the best way to go about finding it,should i just spray carb cleaner all over the engine.And listen for a change in revs, or is there a better way of systematically going round the engine to see if i can find it. Wished i had not messed around now as it was running sweet as a nut.Any advice greatly appreciated.Dean
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Did you refit the vac line to the new hbv?
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Yes mate. :y
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I have obviously disturbed some thing,but i am buggerd if i know what. >:(
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Is the rubber elbow still attached to the primary vac pipe non return valve?
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Is the rubber elbow still attached to the primary vac pipe non return valve?
I don't know mate,i don't think it had one on it when i pulled it off.Dean :y
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Is the rubber elbow still attached to the primary vac pipe non return valve?
I don't know mate,i don't think it had one on it when i pulled it off.Dean :y
It should have... be a good starting point if it's not visible halfway between the brake servo and plenum :y
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Is the rubber elbow still attached to the primary vac pipe non return valve?
I don't know mate,i don't think it had one on it when i pulled it off.Dean :y
It should have... be a good starting point if it's not visible halfway between the brake servo and plenum :y
Hi mate i don't even know where the brake servo is. :-[
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How did you change the hbv?
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How did you change the hbv?
Hi mate,removed windscreen wipers and scuttle,undid bagpipes,fuel line pipes and other things attached to the plenum.Then took the old HBV out and replaced it.I know i have fooked up some where,but don't know where. :-[ :(
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Sounds like you've disturbed all the vac lines removing that lot... Needs someone to systematically work through it to find what's not right :-\
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I must hold my hands up and say that it was me who did the HBV with OP watching over. It was running fine when it came to me, but the vac lines are all over the place, with some missing. So clearly theres something amiss, or something has coincidentally broken...
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Ah, ok... Did you remove the main vac pipe from the side of the plenum to the brake servo? If yes, was the hose reffited to the non return valve... Sits in space above the 135 coilpack plug...
They go brittle over time and it's stupidly easy to snap the spigot off the bottom leaving you with an open connection to the vac system. Other possibilities are:
1. Not refitting the vac pipe between the fuel pressure regulator and the throttle body (especially if the plenum has been liffted to one side)
2. Not tightening the main vac pipe fitting either at the plenum or the fitting connection.
3. Mis/displaced O ring (again not obvious if the plenum was moved to one side)
4. Not reconnecting the hose to the rear multiram.
5. Dislodging of the hose from the purge valve to breather bridge.
Basically work back through what was done and double-check everything. Likely be summat obvious ;)
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Problem is the vac pipes are not right anyway, so tracing which ones have been removed and not replaced properly is difficult. Other problem is my ridiculous shift pattern, we ended up finishing in darkness...
It idles like a you-know-what, but as soon as its moving, OP reports that its just as normal. Does that narrow down where to be looking?
I'm utterly embarrassed to be honest, Ive done half a dozen, and I wrote the spigging guide, and this is the first one to not go right...
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If it drives ok, then it's probably a small leak... But impossible to diagnose remotely :-\
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(http://i297.photobucket.com/albums/mm240/leflemmy/Vacpipesold_zpskgom1ejt.jpg)
or later cars...
(http://i297.photobucket.com/albums/mm240/leflemmy/Vacpipes_zpsbokpw6gx.jpg)
:y
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Ta chaps. I have suggested he source a full set of vac pipes from a breaker on here, since we are going to be removing a lot of bits anyway we might as well put that right as well...
...once I have one of those "day off" things. :-X
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Ta chaps. I have suggested he source a full set of vac pipes from a breaker on here, since we are going to be removing a lot of bits anyway we might as well put that right as well...
...once I have one of those "day off" things. :-X
yeah, I've heard of one of them. Some people get two a week, so I hear. I'm sure I used to have them, too... :)
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Problem is the vac pipes are not right anyway, so tracing which ones have been removed and not replaced properly is difficult. Other problem is my ridiculous shift pattern, we ended up finishing in darkness...
It idles like a you-know-what, but as soon as its moving, OP reports that its just as normal. Does that narrow down where to be looking?
I'm utterly embarrassed to be honest, Ive done half a dozen, and I wrote the spigging guide, and this is the first one to not go right...
Listen mate this not your fault,in any way shape or form.I asked for your help fitting the hbv and you kindly gave it,nobody's perfect.We have probably just made a little mistake,when refitting everything.I am going to have another look tomorrow,and spray a bit of carb cleaner about.Maybe i can narrow it down to an area,but knowing my luck it wont be that easy.LOL.Dean.
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I reckon dude, if you can get a set of vac pipes, then we'll take more time over doing it. Take everything off, clean up, and sort the vac pipes while we have space to play with. :y
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I reckon dude, if you can get a set of vac pipes, then we'll take more time over doing it. Take everything off, clean up, and sort the vac pipes while we have space to play with. :y
Good idea mate,i will put an add for vac pipes in the appropriate section.Only problem then is i don't have the tools,and you don't have the time.LOL.Dean :y
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BTW just wanted to say thank you to all members who have replied to this thread.Dean. :y
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(http://i297.photobucket.com/albums/mm240/leflemmy/Vacpipesold_zpskgom1ejt.jpg)
or later cars...
(http://i297.photobucket.com/albums/mm240/leflemmy/Vacpipes_zpsbokpw6gx.jpg)
:y
Hi i take it my set up is the first one.Been out today to see if i can spot anything,but i may as well be looking up a ducks arse. ;D :D A kind member on here has offered me a set of vac pipes,but from a later car 3ltr x reg i think.My concern's are will this set up have all the pipes i need,it may well have missing the ones i need.Also if the car was idling and running correctly before fitting the hbv,would that not suggest.The vac set up was ok and that i have,disturbed,broken or not fitted something correctly.Also it has been suggested i unplug the MAF,but if it is faulty would it run both rough at idle and when driving.Hope that makes sense,if not feel free to tel me.Any info much appreciated Dean :y
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Any further thoughts on this,or even better anyone up for trying to sort this.Until GK can get a day off lol.Dean :y
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Hi all GK(i am not going to try to spell it again)sorted this today.With much thanks.Dean :y
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Hi all GK(i am not going to try to spell it again)sorted this today.With much thanks.Dean :y
Nice one :y
Disturbing those O rings whilst locating the plenum is pretty easy to do... straightfoward fix though ;)
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What was the specific fault, then? Obviously vac leak of some sort.
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What was the specific fault, then? Obviously vac leak of some sort.
Misplaced O ring on the plenum ;)
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Ahhhh, right :y
Cue jokes about 'his ring' etc... :D