Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: YZ250 on 01 July 2010, 12:43:22
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Car runs as sweet as a nut (2003 3.2 Elite Auto) and shows no codes. 50,000 miles on clock.
A couple of days ago I replaced the cam cover seals/spark plugs/fuel filter/crank ventilator box and HBV (irrelevent really). All genuine parts.
Prior to this the car flew, I know the speeds below are normal but it got there pretty rapid.
50mph in first gear, 85mph in second, 128mph in third gear and in the right conditions it would see 150mph on the clock and did not need that much road to get there. (I have a very long driveway) ;) ;)
After changing the above parts (the spark plugs/fuel filter being the only things to affect anything) the car now seems so flat top end power wise. It seems to run out of puff around 125mph whereas before it would fly up to 130-135mph almost anywhere.. :'( :'(
I have checked to see if I forgot to re-connect any vacuum pipes but can't see anything amiss. Idle is rock steady, power is smooth and driven normally you would not notice anything was wrong. the kickdown still pulls hard low down, it is just top end. :'( :'(
As said, there are no codes showing and it runs perfect apart from this but I want my missile back. I've been driving like Miss Daisy for months now but I like to know the power is there. :-/ :-/
All replaced parts were genuine parts.
Has anyone come across this before as I have obviously missed something.
TIA
Regards
Alan
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sounds like the engine is thrashed,,,
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maybe you used some bad sparkplugs.. or a bad fuel filter.. or your sparkplugs wiring may be old and by touching it you made it leak electricity
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sounds like the engine is thrashed,,,
I don't drive like this all of the time, in fact very very rarely but I like to know it can do it and anyway the issue come about after 'maintenance' and not gradually. :-/
The reference to speed was merely to show that the car is not on par and that I have done something to upset things upon re-assembly.
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Key thoughts:
Fuel filter - Genuine?.....fitted the correct way round?
Vac hoses - Connected up correctly, aprticularly the one at the rear of the plenum?
Fault codes - any present?...pedal test.
Air leaks - Is the brake servo pipe connected up and secure?
And will others please avoid any comments relating to legal speeds etc as there is a problem here to diagnose so lets focus on that.
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Thanks for reply.
Drove the car to work at steady speed and you would never know anything was wrong. Gunned it in sport mode from sliproad onto bypass, pulled like a train in second, into third in the eighties as normal but starting to rapidly fade into treble figures. Car is smooth, no hesitation on kickdown, it just goes flat at the upper end. Idle is good, not lumpy. I agree that as it was a flyer before I touched it, it does point to vac pipes or fuel filter. No codes are present. All parts are genuine, purchased from Perrys Vauxhall Aylesbury. I'm at work tonight so will have to double check everything in the morning but thanks for response. :y
Key thoughts:
Fuel filter - Genuine?.....fitted the correct way round?
Genuine. Trade Club Part No.25313359 Fitted same as one that came off (arrow on filter showing flow)
Vac hoses - Connected up correctly, aprticularly the one at the rear of the plenum?
Top ones all OK. Will double check rear plenum one.
Fault codes - any present?...pedal test.
No codes present. Tested on proper garage code reader.
Air leaks - Is the brake servo pipe connected up and secure?
Will double check this tomorrow. At work now unfortunately.
And will others please avoid any comments relating to legal speeds etc as there is a problem here to diagnose so lets focus on that.
EDIT: Starting to think its fuel filter issue now as car runs too well in other areas.
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if those are not the problems maybe the gearbox.. clutches..
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Obviously it is something that I have replaced (or not replaced if it's vac hose).
As said by Marks DTM it is a case of eliminating the parts that I have removed. I'm sure that I have replaced everything correctly but the only way to tell is to run through it again especially as there are so many hoses behind the plenum.
As I'm now at work, tomorrows course of action will be to check all of the hoses, double check the fuel filter (may even put old one back on for elimation purposes) and if worse comes to worse I will have to put the old plugs back in. :'( :'(
Thankfully I won't have to do the cam covers this time so I might take the plenum back off and start again. Groundhog day. ;D
As the car runs so well under 'normal' driving my biggest problem is testing it out after the work has been done. Might be a case of 'work by day' and 'test by night'. ;) ;)
I will update after work has been done over the weekend. Thanks all for your input. :y
Regards
Alan
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injector relay???
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The loss of power at the top end would suggest a problem with the rear multiram actuator. Have you been able to visually check its operation?
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Well if you've got access to a Tech II / Opelscanner or "My Naff Code Reader" you can activate the multi-rams without running the engine. :y
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The loss of power at the top end would suggest a problem with the rear multiram actuator. Have you been able to visually check its operation?
or pipework
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probably a stupid suggestion but are you sure that you haven't got a mat rucked up under the accelerator pedal to stop the last inch of travel?
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The loss of power at the top end would suggest a problem with the rear multiram actuator. Have you been able to visually check its operation?
Absolutely cock on there IMO, get someone to rev the engine hard while you examine the multi ram, see if it moves, probably easier via tech 2 though, maybe visit The Boy in Brackley?
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Ps, is the electrical connector plugged in on rear multi ram?
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Update for this post:
Please see answers to replies below.
As already stated, car runs as good as gold, idle is good not lumpy, pulls like a train low down, no hesitation and you would never know anything was amiss but I know it went better before I touched it (theres a moral there). ;D ;D
I have even checked that the new crank vent box is seated properly (Note to Chrisgixer, I have edited my breather box post saying maybe you can get to offside bolts but it is tight).
As the car runs so well I am going to run with it for now and see if it settles in. Biggest problem is the health and safety issues of finding out if I have sorted it out. There is no way I can justify full throttle on public roads, even at night. Don't fancy a badger through the grill at 150mph or even worse, a full grown Deer :'( :'( so it could be some time before I get a chance to see if anything has changed. Time will tell.
Many thanks for all replies. :y :y
Regards
Alan
Key thoughts:
Q: Fuel filter - Genuine?.....fitted the correct way round?
A: Genuine. Re-checked flow direction. :y
Q: Vac hoses - Connected up correctly, aprticularly the one at the rear of the plenum?
A: All seem present and correct. Could maybe do with clarification of which rear plenum pipe eg multi-ram from vac reservoir? :-/
Q: Fault codes - any present?...pedal test.
A: No fault codes present. Codes read on Snap-On Modus reader. :y
Q: Air leaks - Is the brake servo pipe connected up and secure?
A: I only undid brake servo to plenum union. :y
maybe you used some bad sparkplugs.. or a bad fuel filter.. or your sparkplugs wiring may be old and by touching it you made it leak electricity[/quote
A: Runs exeptionally well in all other areas but thanks for input anyway. :y
The loss of power at the top end would suggest a problem with the rear multiram actuator. Have you been able to visually check its operation?
A: Flooring accelerator pulls multi-ram like a good-un so this seems OK. :y
Well if you've got access to a Tech II / Opelscanner or "My Naff Code Reader" you can activate the multi-rams without running the engine. :y
[/quoteA: As above, I have seen it work but both bits of advice were a good shout so thanks for that. My mates code reader is a Snap-On Modus and is a general reader so is not Vauxhall specific. Not sure if Modus can operate multi-rams but would be interested to know for future reference. :y
probably a stupid suggestion but are you sure that you haven't got a mat rucked up under the accelerator pedal to stop the last inch of travel?
A: Lol. My mats are Elite mats that are buttoned to main carpet so cannot move. Not a stupid suggestion either as I came home and put my trainers on incase my boots were preventing my ankle from obtaining full throttle. ;D ;D ;D :y
The loss of power at the top end would suggest a problem with the rear multiram actuator. Have you been able to visually check its operation?
Absolutely cock on there IMO, get someone to rev the engine hard while you examine the multi ram, see if it moves, probably easier via tech 2 though, maybe visit The Boy in Brackley?
A: As above. Might have to go to a meet or as you say Chris, The Boy is nearest to me if I get stuck. :y
Why don't they make two stroke cars, the Moto X bike is so easy to work on. :y
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Can you get this sorted asap? i need to know the answer ,my serenity has gone !
Definitely sounds like something got disturbed and fingers crossed you find it for an easy remedy.
One perhaps daft suggestion and it would need to be coincidental is the rear exhaust box innards collapsing restricting air flow(dont know if yours is the full of horse hair type),could have begun at the last good thrashing.Someone more knowledgable than me can perhaps readily dismiss this. Good luck.