Mr Whippy
|
 posted on 13/3/08 at 10:27 AM |
|
|
a huntin we will go...
I've been told to get my crappy old Vectra fixed and sold as it's an eyesore on our drive (I just replaced the chuckys).
After whacking the wheels with a sledge hammer I got it to move but its hunting big time on idle then evening off after about 10 seconds, god I hate
this car.... 
What’s wrong with the heap now? crank / cam speed sensor? I notice that butterfly has an actuator on it and it is that which is making it hunt but as
it's all electronic so there is little I can use my hammer on...
It's a 2ltr 16v ecotec multi-point injection
Any help mucho appreciated 
|
|
|
|
|
Hammerhead
|
| posted on 13/3/08 at 10:32 AM |
|
|
how about a match?
|
|
|
ravingfool
|
| posted on 13/3/08 at 10:35 AM |
|
|
A mate of mine had a similar problem the other day and it turned out to be what appears to be a small and insignificant part which recirculates a
proportion of the exhaust gases back into the air/fuel mix for a second burn. Apparently when that goes wrong the ecu can't get the mix right
cos it thinks there are exhaust gases going in but there aren't or there aren't the right quantity.
If it helps I can check exactly what the part was that went wrong?
|
|
|
vinny1275
|
| posted on 13/3/08 at 10:39 AM |
|
|
quote:
Originally posted by Mr Whippy
as it's all electronic so there is little I can use my hammer on...
I can't help, but I like your thinking.......
|
|
|
dan__wright
|
| posted on 13/3/08 at 10:47 AM |
|
|
quote:
Originally posted by ravingfool
A mate of mine had a similar problem the other day and it turned out to be what appears to be a small and insignificant part which recirculates a
proportion of the exhaust gases back into the air/fuel mix for a second burn. Apparently when that goes wrong the ecu can't get the mix right
cos it thinks there are exhaust gases going in but there aren't or there aren't the right quantity.
If it helps I can check exactly what the part was that went wrong?
EGR valve (exhaust gas recirculation) common problem, guts gunked up, clean it out and it should help.
FREE THE ROADSTER ONE…!!
|
|
|
Mr Whippy
|
| posted on 13/3/08 at 10:47 AM |
|
|
quote:
Originally posted by ravingfool
A mate of mine had a similar problem the other day and it turned out to be what appears to be a small and insignificant part which recirculates a
proportion of the exhaust gases back into the air/fuel mix for a second burn. Apparently when that goes wrong the ecu can't get the mix right
cos it thinks there are exhaust gases going in but there aren't or there aren't the right quantity.
If it helps I can check exactly what the part was that went wrong?
interesting, 'EGR valve' (certainly not something I had even considered. I'll have a look at the manual and see if there is
something like that on the engine, would be nice cos that sounds like it would not cost anything to fix
Don't tempt me Hammerhead, it's already got a bashed back bumper courtesy of the digger bucket from the last time I looked at it.
[Edited on 13/3/08 by Mr Whippy]
|
|
|
melly-g
|
| posted on 13/3/08 at 10:50 AM |
|
|
Yes it`s probably the idle valve on theside of the throttle body!! don`t hit it with a hammer!! take it off and clean it internaly with carb cleaner.
This should help, that is a common problem with them especially if you use supermarket petrol!
|
|
|
colt_mivec
|
| posted on 13/3/08 at 10:55 AM |
|
|
quote:
Originally posted by melly-g
Yes it`s probably the idle valve on theside of the throttle body!! don`t hit it with a hammer!! take it off and clean it internaly with carb cleaner.
This should help, that is a common problem with them especially if you use supermarket petrol!
Why supermarket petrol??? It all comes from the same refinary but gets delived in different trucks so how do you work that one out.
|
|
|
RazMan
|
| posted on 13/3/08 at 10:56 AM |
|
|
Idle Control Valve would be my first thing to look at. The injectors might need a few miles to clear as they can get gummed up too.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
Mr Whippy
|
| posted on 13/3/08 at 11:18 AM |
|
|
it's nice that it's some thing that can be fixed rather than replaced thanks for the help
I thought the fuel contamination thing proved once and for all that supermaket fuel was not the same as used by main garages.
http://news.bbc.co.uk/1/hi/uk/6414905.stm
|
|
|
MikeR
|
| posted on 13/3/08 at 11:21 AM |
|
|
defo idle control valve. At least on the 2.0 you can take it off and clean it. On the 1.8 Astra you can't
On the Astra I just used carb cleaner to clean as much as i could around the throttle body butterfly and it helped huge amounts.
|
|
|
iank
|
| posted on 13/3/08 at 11:23 AM |
|
|
They all come from the same refinaries, but each 'customer' (Shell, BP, Esso, Asda, Tesco etc.) have their own witches brew of additives
(detergents, octane boosters etc) added to their storage tanks.
The Tesco debacle was due to some muppet dumping diesel additives (siliconne) into their petrol tank IIRC - so it could have happened to anyone
assuming it was an employee of the refinery.
Whether the additives make any real difference to the fuel blocking EGRs/injectors etc. would need someone independent in the industry to comment, but
I doubt the supermarkets pay more than they need to.
[Edited on 13/3/08 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
|
|
|
twybrow
|
| posted on 13/3/08 at 02:24 PM |
|
|
Sorry, have not had time to read all posts, but mine 1.8 petrol vectra is in the shjop today having work done. It has had the whole idle issue for
some time now, so let me fill you in on what has worked:
Clean all oil hoses and breathers
Clean out Exhaust Gas Recirc Valve
Look to see if the exh manifold had snapped any of the head studs (mine was not attached on two cylinders!)
Check all engine sensors, particularly lamda sensor
The biggest difference for mine was the oil brethers and the recirc valve. My sump was full of fuel because the hoses and valve were so crudded up.
|
|
|
britishtrident
|
| posted on 13/3/08 at 02:48 PM |
|
|
quote:
Originally posted by colt_mivec
quote:
Originally posted by melly-g
Yes it`s probably the idle valve on theside of the throttle body!! don`t hit it with a hammer!! take it off and clean it internaly with carb cleaner.
This should help, that is a common problem with them especially if you use supermarket petrol!
Why supermarket petrol??? It all comes from the same refinary but gets delived in different trucks so how do you work that one out.
Additives are added to the petrol brands individual specification just before delivery --- thats what went wrong during the great contaminated fuel
fiasco last year.
Also just because a fuel is stored at a particular refinery dosen't mean it was refined there, a lot of fuel sold in the UK is bought on the
Rotterdam spot market and shipped as refined product from the former eastern bock.
[Edited on 13/3/08 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
Mr Whippy
|
| posted on 13/3/08 at 04:49 PM |
|
|
quote:
Originally posted by twybrow
Sorry, have not had time to read all posts, but mine 1.8 petrol vectra is in the shjop today having work done. It has had the whole idle issue for
some time now, so let me fill you in on what has worked:
Clean all oil hoses and breathers
Clean out Exhaust Gas Recirc Valve
Look to see if the exh manifold had snapped any of the head studs (mine was not attached on two cylinders!)
Check all engine sensors, particularly lamda sensor
The biggest difference for mine was the oil brethers and the recirc valve. My sump was full of fuel because the hoses and valve were so crudded up.
thanks dude, very helpful
|
|
|
twybrow
|
| posted on 13/3/08 at 10:59 PM |
|
|
Is it running now then? How is your fuel consumption? I sold my Scooby because it was too thirsty. I bought the Vectra as an economical workhorse. It
turned out it only did max 28mpg because of the idle/running problems! Now I get 35mpg.
|
|
|
NS Dev
|
| posted on 15/3/08 at 09:57 PM |
|
|
i take it its fly by wire throttle, in which case its dead common that the throttle gets a bit gummed up and the throttle servo motor ends up
overshooting all the time causing hunting,
again, cleaning the throttle body out with carb cleaner cures it.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
|
|
|
