Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Search the maintenance guides for answers to 99.999% of Omega questions

Pages: 1 [2]  All   Go Down

Author Topic: Lumpy cold idle  (Read 15442 times)

0 Members and 1 Guest are viewing this topic.

chrisr

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • 0
  • Posts: 100
    • 02 2.2 petrol
    • View Profile
Re: Lumpy cold idle
« Reply #15 on: 09 February 2023, 07:09:43 »
No, I don’t think it’s a previously discussed car, no it has been buggered about with and it had a new manifold a couple of years ago.
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30194
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Lumpy cold idle
« Reply #16 on: 09 February 2023, 10:15:32 »
Quote from: chrisr on 09 February 2023, 07:09:43
No, I don’t think it’s a previously discussed car, no it has been buggered about with and it had a new manifold a couple of years ago.

This thread started off about the rough running of two different cars.

Are you saying that this is a third car ???

I would consider a new manifold buggering about with.

It’s hard enough to diagnose issues remotely without having each question added into the last one about different cars.
Logged
Onanists always think outside the box.

chrisr

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • 0
  • Posts: 100
    • 02 2.2 petrol
    • View Profile
Re: Lumpy cold idle
« Reply #17 on: 09 February 2023, 11:02:15 »
It was running fine both with the previous cracked manifold and with the new one, that’s not the issue. I believe it was you who suggested a coolant sensor problem so I bought a new one but couldn’t locate where it went. I wasn’t aware of two other cars with the same problem. Sorry to have disturbed you, I’ll try somewhere else.
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30194
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Lumpy cold idle
« Reply #18 on: 09 February 2023, 11:43:43 »
Not trying to be unhelpful.

Apologies, I think I may have confused this car with the two of another Chris, both four cylinder cars running rough.

I only realised this when I went to link to that thread :-[
Logged
Onanists always think outside the box.

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30194
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Lumpy cold idle
« Reply #19 on: 09 February 2023, 11:46:38 »
So, from the beginning...

Did you find any split or blocked breather hoses?

Any codes to suggest that the ECU coolant temp is not accurate?

Presumably the exhaust manifold was the one replaced?

Any evidence of an exhaust leak? Erroneous O2 readings when cold from the live data?
Logged
Onanists always think outside the box.

chrisr

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • 0
  • Posts: 100
    • 02 2.2 petrol
    • View Profile
Re: Lumpy cold idle
« Reply #20 on: 20 November 2023, 13:36:28 »
I had the inlet manifold and throttle body gaskets replaced and all is now well. Still couldn’t find where the coolant sensor goes!
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30194
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Lumpy cold idle
« Reply #21 on: 21 November 2023, 00:41:58 »
You couldn't or the place that did the work couldn't locate either coolant sensors ???

Both sensors are at the back of the head and don't require removing anything to access them.
« Last Edit: 21 November 2023, 00:44:35 by Doctor Gollum »
Logged
Onanists always think outside the box.

chrisr

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • 0
  • Posts: 100
    • 02 2.2 petrol
    • View Profile
Re: Lumpy cold idle
« Reply #22 on: 21 November 2023, 09:38:58 »
I couldn’t locate one, let alone two! But then it wasn’t that anyway….
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30194
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Lumpy cold idle
« Reply #23 on: 21 November 2023, 11:29:42 »
Quote from: chrisr on 21 November 2023, 09:38:58
I couldn’t locate one, let alone two! But then it wasn’t that anyway….
https://www.proxyparts.com/car-parts-stock/information/engine-code/y22se/part/cylinder-head/partid/15399511/

The lump on the back of the head is the coolant 'bridge' The black plug is the ECU coolant temperature sensor. The dash temp sender has either a spade or button terminal and should be close by.
Logged
Onanists always think outside the box.

chrisr

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • 0
  • Posts: 100
    • 02 2.2 petrol
    • View Profile
Re: Lumpy cold idle
« Reply #24 on: 27 January 2024, 00:18:01 »
Finally sorted this problem (I hope!) Turned out to be a sticking butterfly in the throttle body, cleaned it all out and lubricated the butterfly and all is well. Now I have done this I wonder if there would be any benefit in putting on a new throttle body, or should it be ok now?
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30194
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Lumpy cold idle
« Reply #25 on: 27 January 2024, 11:51:26 »
The four pot breather system is more fragile than the V6 one as there's no breather bridge to collect the sludge... It all builds p in the TB and cam cover.

Replacing the TB with a brand new shiny one will have one single benefit... It will take longer to sludge up.

Basically, if you regularly and thoroughly clean the breathers and TB as per the guide then you should never have a repeat of this problem.

Coolant temps not withstanding as sensor failure will have the sum total of absolutely nothing to do with a misbehaving throttle.
Logged
Onanists always think outside the box.

Jimbob

  • Global Moderator
  • *****
  • Offline Offline
  • Gender: Male
  • Chester / Flintshire
  • Posts: 24530
  • I like traffic lights, but only when they're green
    • E250 Est / Golf GTI
    • View Profile
Re: Lumpy cold idle
« Reply #26 on: 28 January 2024, 09:44:41 »
You could add in a firetrap, which helps with this iirc.  long long time since I had a 2.2
Logged

chrisr

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • 0
  • Posts: 100
    • 02 2.2 petrol
    • View Profile
Re: Lumpy cold idle
« Reply #27 on: 11 March 2024, 23:08:27 »
Update: having cleaned and lubricated the throttle body and thinking this had solved the problem, it came back again. I put a new throttle body on and immediately had a smooth tick over from cold and it would seem much better fuel consumption. I even saw 36 mpg as an average from Surbiton to Rushden and back, well pleased with that.
Logged

Doctor Gollum

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • In a colds and darks puddleses
  • Posts: 30194
  • If you can't eat them, join them...
    • Feetses.
    • View Profile
Re: Lumpy cold idle
« Reply #28 on: 12 March 2024, 07:58:01 »
Quote from: chrisr on 11 March 2024, 23:08:27
Update: having cleaned and lubricated the throttle body and thinking this had solved the problem, it came back again. I put a new throttle body on and immediately had a smooth tick over from cold and it would seem much better fuel consumption. I even saw 36 mpg as an average from Surbiton to Rushden and back, well pleased with that.
:-X

Did you clean the cam cover and breathers from the sump to the TB  :-\
Logged
Onanists always think outside the box.

chrisr

  • Junior Member
  • **
  • Offline Offline
  • Gender: Male
  • 0
  • Posts: 100
    • 02 2.2 petrol
    • View Profile
Re: Lumpy cold idle
« Reply #29 on: 18 March 2024, 19:18:02 »
Cam cover was done a little while ago when I changed the gasket, all breathers cleaned that I could find.
« Last Edit: 18 March 2024, 19:20:29 by chrisr »
Logged
Pages: 1 [2]  All   Go Up
« previous next »
 

Page created in 0.013 seconds with 17 queries.