Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: pauls on 22 August 2015, 12:26:20

Title: trying to stall
Post by: pauls on 22 August 2015, 12:26:20

Driving from cold on the way to work if I get stuck in stop start traffic after about 5 mins of doing this the car trys to idle but the revs feel like they drop and its going to stall. This happens wether its in drive or neutral.  When traffic clears and I can drive normal for a few miles, when doing stop start driving again it will run and idle fine.
any ideas please.

Title: Re: trying to stall
Post by: zirk on 22 August 2015, 12:38:48

Any Codes?

Title: Re: trying to stall
Post by: pauls on 22 August 2015, 12:45:23

No codes..

Title: Re: trying to stall
Post by: zirk on 22 August 2015, 12:53:41

Start of a misfire?, try unplugging the Maf, does it get better or worse.

Also what's the temp gauge doing when this happens?

Title: Re: trying to stall
Post by: pauls on 22 August 2015, 13:09:17

Will try the maf .. trouble is it only happens now and again. Can I leave it unplugged for a few days. Temp is either just warming up so around 80

Title: Re: trying to stall
Post by: Andy H on 22 August 2015, 13:25:33

Initial thoughts are that either the ECU is being given duff temperature readings during warm up or that you have 'carburettor icing'

Any frost on the throttle body?

The 3.2 gets air temperature from the MAF so the MAF is one suspect. It gets coolant temperature from a different sensor to the dash so you need a code reader that can show live readings if you want to check that one.

Title: Re: trying to stall
Post by: zirk on 22 August 2015, 13:27:01

Ideally you want to unplug the maf when its doing it, leaving it unplug it will run rough and drink petrol.

I was half thinking, stop start traffic, temp going up, hence air intake temp going high and map miss reading.  :-\

Title: Re: trying to stall
Post by: TheBoy on 22 August 2015, 15:21:12

Do the throttle butterlies fully shut?

Title: Re: trying to stall
Post by: pauls on 22 August 2015, 15:36:42

Quote from: TheBoy on 22 August 2015, 15:21:12

Do the throttle butterlies fully shut?

Yes and both clean..

Title: Re: trying to stall
Post by: TheBoy on 22 August 2015, 19:09:05

Any airleaks in the intake?

Title: Re: trying to stall
Post by: pauls on 22 August 2015, 19:33:51

Not that I know off

Title: Re: trying to stall
Post by: pauls on 03 September 2015, 19:14:22

Change maf for a new bosch one and its still as bad as every if not worse.. Any ideas please.

Title: Re: trying to stall
Post by: EMD on 03 September 2015, 19:22:38

All plug wells dry and no sign of corrosion on the coil packs  ???

Title: Re: trying to stall
Post by: pauls on 03 September 2015, 19:38:05

Yes all clean and dry.

Title: Re: trying to stall
Post by: ffcgary1 on 03 September 2015, 19:59:49

crank sensor starting to fail.?

Title: Re: trying to stall
Post by: TheBoy on 03 September 2015, 21:16:04

Now you have a gadget...

what is MAF reading at idle?

What is desired engine speed
 What is actual engine speed