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1

Omega General Help / Re: Idle too fast for MOT emission test

« on: 19 August 2012, 12:09:53 »

Must have been my lucky day! Manually pushing back on the throttle linkage (where the throttle/auto choke cables attach at the front of the engine) slowed her down to the right level. Bit of a clue that. Stupid not to check the obvious before panicking but I was spooked by what the MOT guy had said. The solution was easy...

There's a throttle stop screw with a 6mm locknut set just below the linkage. All it needed was a quarter-turn anti-clockwise to bring the rev level back into spec. The most difficult part was finding a 6mm spanner that would fit the locknut. A ring spanner is really needed but the nut was in just the right position to get enough purchase with a flat. Sorted. Whew!

Thanks for all your help - and especially to TheBoy for the offer of the Tech2 - thank goodness it wasn't needed on this occasion. It's nice to know that there are good people out there who are willing to help, even when they're on holiday!

Onwards and upwards. I'll get the MOT sorted tomorrow (at a different garage) and then it's on to the oil leak. I should start a new topic for that, right?

2

Omega General Help / Re: Idle too fast for MOT emission test

« on: 16 August 2012, 17:34:00 »

Wow, thank you cem and Kevin for the speedy replies. Much appreciated - as is the info. I'll work through your suggestions in the morning (day off to get this sorted) and I'll let you know what I find, and hopefully what the resolution was.

With regard to the oil leak (and for others who might follow this thread), I think I've found the maintenance articles your referred to here:

Cleaning the V6 crankcase breather setup http://www.omegaowners.com/forum/index.php?topic=90653.0
V6 Plenum Removal http://www.omegaowners.com/forum/index.php?topic=90657.0

Is that correct?

3

Omega General Help / Idle too fast for MOT emission test

« on: 16 August 2012, 16:33:14 »

Just had an MOT refusal because the idle was too fast for the MOT emission test. 900+ rpm and the test needs 520-780 rpm. The mechanic said I should take it to a main VX dealer to get the ECU diagnosed. Lots of £ signs flashing before my eyes!

It seems so trivial to fail on something like that but there's nothing in the Haynes manual to suggest that the idle speed is adjustable.

I changed the Idle Control Valve fairly recently (because of an erratic idle) and it's been fine since then so I'd be surprised if that's the problem.

Generally, the car's running OK - apart from an oil leak that seems to be getting worse. Not sure it's connected to this problem but here's the detail: The engine was running lumpy, like it was missing. A Saab mechanic diagnosed a oil leak that was flooding the HT leads/spark plug pots. He fixed it by replacing the rocker box gaskets. All was well for a while (I do very little mileage) but now the oil leak is back with a vengeance and it's running lumpy again. Doesn't seem to get through much oil but a little goes a long way - as the MOT guy found out when he got dripped on with hot oil. Boy was he grumpy.

Anyway, back to the plot. Does anybody have any ideas how I can slow the idle down - even temporarily would do - so that I can get it through the MOT?

Thank you.

4

Newbie Welcome Area / Greetings from Milton Keynes

« on: 16 August 2012, 16:10:10 »

Hi All,

Just signed up so I thought I'd say hello. "Hello"

Yes, of course I've got a problem I'd like some advice on - but I'll post it separately. I spent a bit of time researching the problem here before I decided to register and I just wanted to say that the main reason I registered is because of how impressed I was by the incredible friendliness and helpfulness shown by everybody on the forum. Fantastic and appreciated by all us 'wanderers in the dark' I'm sure.