Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: kev the omega novice on 26 February 2010, 17:54:25

Title: idiling probs
Post by: kev the omega novice on 26 February 2010, 17:54:25

i,ve taken the throttle body off and cleaned thoroughly , also the iacv too . the two breather pipes , also cleaned the small jet from small breather to throttle body . car idiled smoothly and drove nice for a few miles , then when car upto running temp of 85 /90 . car starts to occaisionally idle up and down from 500 + to 1500 revs , then drops to a smooth 500+ . any forth coming help would be much appreciated.

Title: Re: idiling probs
Post by: tunnie on 26 February 2010, 17:58:13

thats quite a big jump in rpm, i'd check the throttle body butterfly is free moving and not getting stuck

Title: Re: idiling probs
Post by: kev the omega novice on 26 February 2010, 18:03:31

thanks i,ll have a look at it tommorow , it did seem quite strongly sprung when i cleaned it but did,nt seem to be stuck  .

Title: Re: idiling probs
Post by: Dave Elite on 26 February 2010, 18:11:56

If the revs are going up and down on there own then it wont be the throttle butterfly, more likely an air leak.

Title: Re: idiling probs
Post by: Abiton on 26 February 2010, 18:13:18

Check for any stored fault codes with a trusty paperclip.   :)

Title: Re: idiling probs
Post by: kev the omega novice on 26 February 2010, 18:23:45

as i,m no mechanic but a novice could you give me some pointers on the air leak front ie where to start. cheers.

Title: Re: idiling probs
Post by: tunnie on 26 February 2010, 18:39:13

check all the breather pipes, throttle body, air filter all all secure, with the bonnet up and engine running run your hands over the throttle body areas, feel & listen for any leaks.

Symptoms i had with sticking throttle body was approaching junctions, you slow to a stop, butterfly does not close all the way, keeps idle high, then after a while sorts itself out, and back to normal idle.

Title: Re: idiling probs
Post by: kev the omega novice on 28 February 2010, 11:05:22

thanks for the advice i,m on with the work today . hope i can get it sorted soon.

Title: Re: idiling probs
Post by: kev the omega novice on 05 March 2010, 16:40:46

thanks for the advice .don,t seem to be any obvious air leak,s . lubricated butterfly and seem,s better , time will tell.

Title: Re: idiling probs
Post by: Auto Addict on 05 March 2010, 16:54:48

Make sure the throttle cable hasn't been adjusted to compensate for idling.

Title: Re: idiling probs
Post by: kev the omega novice on 08 March 2010, 17:39:01

the circlip on the throttle adjuster is on the 7th notch , working from the rear of the adjuster. does that sound aout right?

Title: Re: idiling probs
Post by: hotel21 on 08 March 2010, 19:13:12

You really need to ensure there is sufficient free play/slack.  One persons seventh notch is anothers 10th......   ;D

Title: Re: idiling probs
Post by: kev the omega novice on 09 March 2010, 16:49:33

thanks for that , there is plenty of play in the cable , so i ,ll go with it being fine.