Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: danny21 on 26 July 2020, 17:54:19

Title: Cold start missing
Post by: danny21 on 26 July 2020, 17:54:19

Hi all
I am new to this but will try to explain my problem the best I can

Recently my car has been feeling rearly laboured On pull of and up hills and after some investigation I changed the mass air flow sensor and air filter while I was at it.

Car is much better now runs great and effort less which is great

But here is the thing on cold start up the engine is missing not for long tho 2 mins of driving it runs like a dream but thing is this didn’t do this before changing the mass air flow sensor

Any ideas chaps

Title: Re: Cold start missing
Post by: Enceladus on 27 July 2020, 00:33:46

Auto or manual? 2.2 16v?

Does/did the spanner light come on?

Pull the ignition module and check for oil and/or water in the plug wells?

Title: Re: Cold start missing
Post by: danny21 on 27 July 2020, 08:03:42

Hi no spanner light anymore did have it come  on frequently before changing mass air flow sensor

And plug wells all dry changed plugs a few days ago to  :-\

Title: Re: Cold start missing
Post by: danny21 on 27 July 2020, 09:08:30

Oh and sorry it’s auto  ;D

Title: Re: Cold start missing
Post by: Enceladus on 27 July 2020, 10:04:37

My first thought would have been the cam sensor playing up. At least on the symptoms you started with and the fact it"s an auto.

But the loss of power under load seems to have been cured by replacing the MAF sensor.

Is cold idle any better if you unplug the MAF?

Title: Re: Cold start missing
Post by: danny21 on 27 July 2020, 18:38:06

To be honest I haven’t tried unplugging it will it run okay unplugged I will give that a try in the morning see what happens, and report back,

What are your thoughts if it runs okay unplugged 🙂

Title: Re: Cold start missing
Post by: Doctor Gollum on 28 July 2020, 10:32:12

That the new NAF is faulty.

Title: Re: Cold start missing
Post by: danny21 on 28 July 2020, 10:48:10

Good morning

Okay unplugged the maf started up no missing at all, turned of restarted with it plugged back in missing strait off guess  that the maf is faulty, question is I got this on amazon for £19.99 the make is YAOPEI was that a mistake,?,

What is best place to source one and any certain make?. :-\ :-\

Title: Re: Cold start missing
Post by: Doctor Gollum on 28 July 2020, 10:51:24

Get a Bosch one from your local factors or a genuine one from a genuine Vauxhall dealer.

Call the £19.99 Stupid Tax and learn from it :y

Title: Re: Cold start missing
Post by: danny21 on 28 July 2020, 10:59:12

Okay I will get right on to that will confirm that has solved the problem in due courses 😀