Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: BazaJT on 15 November 2018, 14:55:45

Title: M.o.T.
Post by: BazaJT on 15 November 2018, 14:55:45

Had the Omega in for test today which it promptly failed,threw me a bit of a curve as it failed on emissions and not something mechanical or rusty.It's apparently the lambda readings which are slightly too high.Readings were;
Fast idle test
            CO 0.04%
            HC 21ppm
      Lambda 1.05[should be 0.97-1.03]
Second fast idle test
           CO 0.00%
           HC 4ppm
     Lambda 1.05[should be 0.97-1.03]

Natural idle test

           CO 0.00%

Car was taken for 20 mile blatt down local motorway prior to these readings,no EML or other lights on dash to indicate a fault.Thinking a change of plugs and some injector cleaner in the tank or am I wide of the mark?Any other ideas people?

Title: Re: M.o.T.
Post by: Bigron on 15 November 2018, 15:28:18

Cataclean and Shell V-Power worked for me: as well as a drive in TB mode!  ;D

Ron.

Title: Re: M.o.T.
Post by: Doctor Gollum on 15 November 2018, 15:48:25

Quote from: Bigron on 15 November 2018, 15:28:18

Cataclean and Shell V-Power worked for me: as well as a drive in TB mode!  ;D

Ron.

This...

Fresh air filter might also be of benefit  :y

Title: Re: M.o.T.
Post by: Migv6 le Frog Fan on 15 November 2018, 16:34:23

Or no air filter at all during the test.  ;)

Got mine booked in for next Tuesday. Only thing Im aware of needing to do is replace the eml bulb and clear the code before the test.

Title: Re: M.o.T.
Post by: BazaJT on 15 November 2018, 19:03:34

Ok fresh air filter not a problem-I'll do that at same time as plug change.Is injector cleaner the same thing/do the same job as cataclean?If not is cataclean what you ask for at the factors?

Title: Re: M.o.T.
Post by: Doctor Gollum on 15 November 2018, 19:26:04

Wynns fuel and injector cleaner plus top the tank up with Shell V power :y

Title: Re: M.o.T.
Post by: henryd on 15 November 2018, 19:36:34

Any small exhaust leak will mess with the Lambda reading, may be a small enough blow not to fail the test :y

Title: Re: M.o.T.
Post by: Kevin Wood on 15 November 2018, 20:42:25

Quote from: henryd on 15 November 2018, 19:36:34

Any small exhaust leak will mess with the Lambda reading, may be a small enough blow not to fail the test :y

Yep, and given the rest of the results this is where my money would be, in addition to checking the plugs. There's a bit of hc in the exhaust so any sign of a misfire?

I don't think additives are going to help.

Title: Re: M.o.T.
Post by: BazaJT on 15 November 2018, 21:54:42

No sign of a misfire as far as I can tell,tickover is smooth and even as is acceleration and it holds 70mph[honest your honour]with no hesitation.Will check exhaust carefully for any sign of a leak although nothing was noted on the test.

Title: Re: M.o.T.
Post by: Webby the Bear on 16 November 2018, 18:24:08

Quote from: henryd on 15 November 2018, 19:36:34

Any small exhaust leak will mess with the Lambda reading, may be a small enough blow not to fail the test :y

This 👍