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106

Omega General Help / Re: 2.2 Sounding rough for a bit, fine after few mins ?????

« on: 24 June 2015, 22:38:03 »

No HT leads on a 2.2 - coil pack above plugs - this can be a source of "rough" running and sensitive to heat

Changing plugs best place to start

DONT clean the MAF more chance of ruining it than improving it

Best place to start is cleaning the throttle body - guide here http://www.omegaowners.com/forum/index.php?topic=90528.0

Make sure there are no vac leaks - lightly spray brake cleaner around inlet/brake servo area and EGR (rear of head) if there is a change in engine "note" you have a leak.

Cam sensor can effect running of car and can be sensitive to heat

HTH for now
Phil

edit should type faster 
edit 2  was new cam sensor genuine GM

107

General Car Chat / What a good idea ...

« on: 23 June 2015, 21:35:43 »

... see through trucks (Samsung)

https://www.youtube.com/watch?v=6GNGfse9ZK8

Simple but effective

108

Car Parts, bits For Sale & Wanted / WTD: 2.2 Exhaust manifold

« on: 21 June 2015, 21:22:42 »

As above but the one without a crack in it 

for 03 Estate if specific (dont think they are)

PM or reply with price inc delivery

TIA Phil

109

Omega General Help / Re: P1555 error - Tried everything

« on: 19 June 2015, 00:27:55 »

Silly question, cam sensor was GM?

Oh yes of course 

Thought it was just checking.

Very odd. Have your tried disabling LPG to see if it remains? Pull fuse for LPG ECU?

Had it to the LPG man today, had a quick look everything seemed OK, BUT, going back next week for more in depth look and to look at why LPG mix is so far out as to cause rev change.

But thanks for suggestion might try that over the weekend

110

Omega General Help / Re: P1555 error - Tried everything

« on: 18 June 2015, 23:17:37 »

Silly question, cam sensor was GM?

Oh yes of course 

111

Omega General Help / Re: P1555 error - Tried everything

« on: 18 June 2015, 18:58:46 »

Further info

At idle, at normal temp
Fuel sys 1 at Closed Loop
RPM between 750 to 760
MAF g/h is varying up and down within same range all the time
Short Trim is varying around 0, but also going -ve for a short time
02 sensor 1 is constantly varying between .2v to .8v, didn't see it change but cant watch short trim at same time

Long trim is staying at 11.7 all the time. Would expect it to change as ST goes -ve so is this the prob ?

Is there a way of resetting the long trim, eg disconnect battery for X hrs, unplug ECU ? ? ?

112

Omega General Help / Re: P1555 error - Tried everything

« on: 18 June 2015, 12:06:48 »

Update - HELLLLP

Have now replaced accelerator position sensor (thanks Joff) and no change

Borrowed Mr Beanz Autel Maxiscan (thanks) and although a limited number of live data items to look at there are two significant (to me)


Fuel Sys 1 reading from cold start (on petrol only) is showing CL (closed loop?)
when I short rev the eng it changes to OL_DRIVE
when I force the error (hold at 1500 rpm, spanner on) it stays on OL_DRIVE for about 10s then goes to OL_FAULT

To me this looks like normal operation until spanner light and then the error makes this change to OL_Fault

short trim come on an off with CL (expected) but is running at 10ish which might be high but engine cold
long trim is at 11.7

The other thing, and just discovered, is that while holding at 1500rpm on petrol and switching on LPG the revs go up to 2000, then back to petrol and drops back to 1500, That confuses me so going to see the LPG man as all this might be LPG system related, I don't know

113

Omega General Help / Re: rough rnning

« on: 15 June 2015, 21:59:07 »

You know what, in nearly 10 years, 180k. I've never cleaned EGR, on my 2.2

Perhaps I should!

What benefits are there with blanking it off?

So as to find out if, or exclude it from, possibly causing the problem.

AFAIK there is no benefit from it being permanently blanked (or even cleaned) on a 2.2, if anything I have read that fuel consumption will go up

114

Omega General Help / Had enough of this P1555ing error now

« on: 15 June 2015, 21:52:58 »

Following on from this thread http://www.omegaowners.com/forum/index.php?topic=130904.0

Joff has supplied me with a replacement throttle position sensor (accelerator) and after fitting it and carrying out the throttle adaptation as kindly advised by RobG, the problem still exists 

Soo the next thing is to get some live data and the question is, what should I look at/record so as to get you experts to point me at the one thing I have not yet done 

TIA
Phil

115

Omega General Help / Re: rough rnning

« on: 15 June 2015, 21:35:46 »

the egr blanking plate arrived today and my question is.....do i use any gasket cement on both sides of the plate to make it air tight when i bolt it on between the valve and manifold...thanks 

Quick answer, No, but leave the original gasket in

Is it still running fine with the different fuel ?

116

General Car Chat / Halfrauds lives up to its name

« on: 14 June 2015, 12:41:30 »

http://garagewire.co.uk/news/halfords-autocentre-fined-47000-following-undercover-sting/

117

Omega General Help / Re: rough running

« on: 13 June 2015, 17:52:36 »

Started car up today,,,,no different after cleaning breathers and changing throttle body.......now the emissions light has come on and it is missing on tickover and up to about 2000 revs standing still but drives ok until stopping and then tick over very erratic....so what else could it be,???...would it be the cam sensor ...the fuel filter looks to be very old,,but if it was petrol surely it would not drive properly at speed.....although recent spark plugs fitted  ( Bosch ) and they still all look the same colour could it be the plugs...is it worth changing them once again,,,already changed the coil pack,,,so any ideas please ,thanks.

What have you done with the EGR?

118

Newbie Welcome Area / Re: Hello again!

« on: 12 June 2015, 20:36:41 »

Don't mention the garage!                I did and thought I'd got away with it.....                                                I didn't!   

You wasted two extra posts there Tig 

119

Omega General Help / Re: rough rnning

« on: 12 June 2015, 09:19:59 »

Cheers phil....i have noted that and will give it a try.....some people blank off the e.g.r. valve completely and just have the light turned off when it comes on.....so is there any harm in doing this or is it better to use the e. g .r .....as intended by vauxhall..

Your not removing the EGR just blanking it (put the EGR & gasket back on) so it will not feed exhaust into the inlet at any time.

On the 2.2 it probably will not make any noticeable difference if you leave it there, if the EGR is faulty, saves you having to replace it until you are ready 

Look here to see my exploits http://www.omegaowners.com/forum/index.php?topic=126804.msg1617741#msg1617741

120

Omega General Help / Re: P1555 error - Tried everything

« on: 12 June 2015, 01:08:46 »

So you've sorted it then .......  http://www.omegaowners.com/forum/index.php?topic=130958.msg1677417#new

The simplest/cheapest fixes are the best 

Big time is right - No - waiting for a TPS from Joff now

That post was about last years difficult to find little prob  http://www.omegaowners.com/forum/index.php?topic=126804.msg1617741#msg1617741

Decided to just get a TPS and put it in.
Logically I have looked at everything else and this actually fits into why there are no other symptoms apart from the error code

Wish me luck - you can hold onto our Autel for now