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[bigpaul]

Hi Guys its been a while 

so the car is high reving like a bitch = 2.6 v6 on X plate.

Stop at lights/roundabout/give way 2000 revs some times drops if i dip the clutch, rev it some more, turn the steering wheel.

It does on a run as well but probably not so noticeable but there for sure.

Speak to my mate the spanner manner who knows someone to plug in and take a look.

Lots of jargon talk but doesnt seem to be sure great advice cost £40 

I can sit in the car rev the pedal and up she shoots to 2000 nowif i dont attempt something it may be 10 minutes plus before she brings down the revs herself.

Anyway the word throttle body has come up so i bought one off ebay about £35 but being a complete idiot took parts off it to try and rectify this problem so the result you ask ?
well i reduced the revs and time of sticking still doing it but not as much at this point i played some more changed the motors over and BANG !!! problem back again.

So theres the background question is does this problem seem to you to be the throttle body control etc because i was considering buying another and fitting it complete this time.

Appreciate any help and advice you can offer

[Jimbob]

Do the pedal trick to check for codes and report back with your findings...link in my sig.

[bigpaul]

yeah the codes are 170/173 which suggest the lambada sensors but this has been dismissed by the guys at the garage now to be fair they have a good rep and one runs an omega but once they discounted the obvious and saw they were dealing with a 2.6 they were struggling.
the suggestion was there are 2 control links to the rev situation one throttle body which he said was very expensive ? not on ebay and one other that just confused me

[Jimbob]

Actually Fuel trim codes, as opposed to Lambda codes...

P0170 Fuel trim malfunction (Bank 1)
P0173 Fuel trim malfunction (Bank 2)

As a stab in the dark...How does it run if you unplug the MAF?

[Jimbob]

Did the diags bloke look at any live data, or just codes?

[Jimbob]

reading your history...MAF has been mentioned in the past...

Did / Have you ever changed it?  Is yours genuine / bosch / chinese?

[bigpaul]

well he took it off me for the day so i am presuming he did all necessary checks he reset the engine management light a few times but i told him that wasnt it which he agreed

he was 70% confident it was linked to the throttle body and like i said it did run a bit better when i moved parts obviously i made an error in judgement in not doing a proper job as apposed to moving bits from one to the other.

im a bit of a techniphobe can you tell me more about the MAF what it does etc and how this will help me

[Jimbob]

http://www.omegaowners.com/forum/index.php?topic=90475.0
Will give more insight into fuel trims
and
http://www.omegaowners.com/forum/index.php?topic=90447.0
more into the MAF

Try unplugging the MAF and see what happens...  Just find it, as below, and unplug the connector, the other one nearby is for the air temperature, leave that one alone.  Check ebay for MAF pics if you want to double check the connector your removing is the right one.

The MAF sensor is easy to find, it is normaly located in between the airfilter housing and the throttle. In teh case of the V6 it is just below the first 90 deg bend as the pipe exits the air filter. The devcie it self is a tube of betwen 50 and 150mm in length (later ones are smaller i.e. on the 2.2)

[symes]

have you checked its not something simple like sticking throttle spindle?-only a guess though mate TBH

[bigpaul]

ok i see MAF mentioned alot soi will have to see if i can identify it being an idiot im only going to unplug the wrong bit.

The spindles is an interesting thought when i dismantled the throttle housing in idiot mode I noticed the spindle passed over tiny flaps which all seemed crincled on the one in the car and not on the replacement one of course by thet time i had ruined everything

[Andy H]

have you checked its not something simple like sticking throttle spindle?-only a guess though mate TBH

2.6 should have a code for that

[bigpaul]

codes are as before always the same 170 and 173 fuel trims

[Andy89]

here's a pic of the maf 
http://oldsite.omegaowners.com/forum/YaBB.pl?num=1248799817/0

[Jimbob]

the codes wont go if you unplug the maf....but how does it run?

[Andy H]

have you checked its not something simple like sticking throttle spindle?-only a guess though mate TBH

2.6 should have a code for that

Codes for 2.6 are here http://www.omegaowners.com/forum/index.php?topic=90594.0

Looks like P1500, P1523 or P1526 would come up if the throttle was sticking so my advice is leave well alone and follow Jimbobs excellent instructions