Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: llewellyn237 on 23 October 2012, 18:40:57

Title: Anyone know what's causing high emissions/heavy fuel consumption?
Post by: llewellyn237 on 23 October 2012, 18:40:57
My 52 plate 2.2 CD Auto just passed its test but I was advised that the emissions only just scraped it through.

It's well serviced and ran as economical as possible but I'm only getting about 50-55 miles out of £20 (roughly 14.5 litres.)

Title: Re: Anyone know what's causing high emissions/heavy fuel consumption?
Post by: Kevin Wood on 23 October 2012, 18:57:12
Can you scan in and post the emissions report?
Title: Re: Anyone know what's causing high emissions/heavy fuel consumption?
Post by: llewellyn237 on 24 October 2012, 18:29:12
(http://imageshack.us/a/img843/3116/003fq.jpg) (http://imageshack.us/photo/my-images/843/003fq.jpg/)

Title: Re: Anyone know what's causing high emissions/heavy fuel consumption?
Post by: Kevin Wood on 24 October 2012, 23:51:35
So.. Emissions fine at fast idle and particularly the lambda value is bang on the money. A little marginal at natural idle, so maybe the cat is getting a little tired, or would benefit from an Italian tune up. Could also be an air leak at idle adding a bit of extra air, I suppose.

Nothing too worrying there, though.

I'd be inclined to check for air leaks, cleanliness of the breathers and throttle body, and that it's warming up quickly to proper operating temperature (just under the middle point on the gauge).
Title: Re: Anyone know what's causing high emissions/heavy fuel consumption?
Post by: Vamps on 25 October 2012, 01:47:48
Quote from: Gareth237 on 23 October 2012, 18:40:57
My 52 plate 2.2 CD Auto just passed its test but I was advised that the emissions only just scraped it through.

It's well serviced and ran as economical as possible but I'm only getting about 50-55 miles out of £20 (roughly 14.5 litres.)
[/highlight]

What is that in English? ::) ::) ::)  2.2CD Auto should get around 27 MPG commute and town running.. ime.........the 2.6 gets similar with swmbo driving... :o :o ;)
Title: Re: Anyone know what's causing high emissions/heavy fuel consumption?
Post by: llewellyn237 on 25 October 2012, 17:08:03
Quote from: Kevin Wood on 24 October 2012, 23:51:35
So.. Emissions fine at fast idle and particularly the lambda value is bang on the money. A little marginal at natural idle, so maybe the cat is getting a little tired, or would benefit from an Italian tune up. Could also be an air leak at idle adding a bit of extra air, I suppose.

Nothing too worrying there, though.

I'd be inclined to check for air leaks, cleanliness of the breathers and throttle body, and that it's warming up quickly to proper operating temperature (just under the middle point on the gauge).

Thanks man, much appreciated.
Title: Re: Anyone know what's causing high emissions/heavy fuel consumption?
Post by: Craig32 on 25 October 2012, 22:12:35
Thats interesting about the MPG, I have a 2.2 Petrol Auto and its awful fuel economy. About 22-24 with a feather foot down to 15 up a mild gradient. My Vetra GSi did about 30-34 around town and 40 plus on the M way. My old 3.6 XJS was better on petrol  :-[