Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: JamesT on 08 October 2013, 11:12:01

Title: bad idling and accelleration
Post by: JamesT on 08 October 2013, 11:12:01

Hello, can anyone who has excel look at the following files and, hopefully, give me a clue as why my omega idles badly and hesitates on acceleration for a couple of seconds.

https://skydrive.live.com/redir?resid=BDCCCC133C448446!224&authkey=!APuTk9mSGXVGwGo
https://skydrive.live.com/redir?resid=BDCCCC133C448446!225&authkey=!AH559XAaAbse-hQ

I have changed all rubber 'O' rings on injectors and under the top plenum.
The EGR valve was replaced as it had failed open circuit but it made no difference.
Everything I have tried has made no difference at all.

can someone please help before my wife drives me mad complaining about the amount of time I am spending on trying to fix it. :'(

Title: Re: bad idling and accelleration
Post by: Andy B on 08 October 2013, 11:28:33

All breathers OK?

Idle Air Control Valve clean?

Cam covers oil tight? .... ie pull the HT leads & check that your plugs aren't swimming in oil

Title: Re: bad idling and accelleration
Post by: JamesT on 08 October 2013, 11:43:31

All breathers appear to be OK.
Idle Air Control Valve looks clean. if I disconnect the power to it a loud hissing can be heard.
I have pulled off all HT leads and cleaned them up, but they were not very dirty anyway.

Title: Re: bad idling and accelleration
Post by: Andy B on 08 October 2013, 11:59:54

Quote from: JamesT on 08 October 2013, 11:43:31

All breathers appear to be OK.
Idle Air Control Valve looks clean. if I disconnect the power to it a loud hissing can be heard.
I have pulled off all HT leads and cleaned them up, but they were not very dirty anyway.

Appear?  ::) Or are?  ;)

It's difficult to tell whether IACV ss clean by looking  ;) You need to spray carb cleaner down on to the rotary valve & give it a good shaking .... repeat till the cleaner comes out clean. Spray inside then with a light oil

HT leads ..... it's obvious if the cam covers have gone - the HT lead pulls off the plug & is dripping with oil and the plug itself is drowning  ;)

Title: Re: bad idling and accelleration
Post by: cem_devecioglu on 09 October 2013, 12:29:04

if you want to see a perfect idle you have to look a perfect working engine (piston rings,valves,stem seals , lifters,ignition components  etc) with all the sensors.. and unfortunately 97 ecus rarely lit the eml for bad idle..
 
mine is also 97 and I have changed loads of things..   however bad acceleration is a good hint.. I recommend having a live  tech 2 session..
 
is it auto..
 
ps: also compare it to another known healthy car ..

pps: unfortunately ignition components dont bring any eml..
 
 
 

Title: Re: bad idling and accelleration
Post by: Johnny English on 09 October 2013, 13:47:56

Quote from: cem on 09 October 2013, 12:29:04

if you want to see a perfect idle you have to look a perfect working engine (piston rings,valves,stem seals , lifters,ignition components  etc) with all the sensors.. and unfortunately 97 ecus rarely lit the eml for bad idle..
 
mine is also 97 and I have changed loads of things..   however bad acceleration is a good hint.. I recommend having a live  tech 2 session..
 
is it auto..
 
ps: also compare it to another known healthy car ..

pps: unfortunately ignition components dont bring any eml..
 
 
 

+1  :y

with tech2 you can get the plugs sparked one by one and easy job to identify the faulty cylinder.   ;)