Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: cem_devecioglu on 12 December 2007, 10:20:33

Title: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 10:20:33
its been long time this idle problem make me crazy.. >:(

how you say..Intermittent..

I have changed nearly all sensors CTS, Lambda,Throttle poten.,Thermostat, camshaft,crankshaft etc.

Also ICV changed..

cleaned breathers and all necessary stuff many times..

De-cat, exhaust system completely changed..

Except MAF and air temperature sensor..

Tried carbon clean also..All help..Car is much much better..

But problem is from time to time when the engine reach normal temperature 92-93 and I stop at the traffic

lights I feel engine is shaky, the RPM needle dont move but I feel engine tremble different than normal..No EML

lights no error codes..

if you open the bonnet you can see engine is working differently..But no cough no misfire..

After it heats up totaly its lost (20-25 minutes of driving) ...

This is more visible in summer now happens very rarely but still disturbing me..

Any ideas welcome..






Title: Re: historical idle problem..
Post by: Mike Collins on 12 December 2007, 11:02:02
Have you tried blanking off the EGR? if you have one that is.
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 11:28:25
Yep..I blanked the EGR..forgot to say :-[ ..

Whats left MAF, fuel pump, fuel relay...And trial error is expensive..

as its intermittent nobody could find it  :(

Title: Re: historical idle problem..
Post by: Golfbuddy on 12 December 2007, 12:09:33
Could there be any water or dirt in the fuel?
Title: Re: historical idle problem..
Post by: Darth Loo-knee on 12 December 2007, 12:20:34
Quote
its been long time this idle problem make me crazy.. >:(

how you say..Intermittent..

I have changed nearly all sensors CTS, Lambda,Throttle poten.,Thermostat, camshaft,crankshaft etc.

Also ICV changed..

cleaned breathers and all necessary stuff many times..

De-cat, exhaust system completely changed..

Except MAF and air temperature sensor..

Tried carbon clean also..All help..Car is much much better..

But problem is from time to time when the engine reach normal temperature 92-93 and I stop at the traffic

lights I feel engine is shaky, the RPM needle dont move but I feel engine tremble different than normal..No EML

lights no error codes..

if you open the bonnet you can see engine is working differently..But no cough no misfire..

After it heats up totaly its lost (20-25 minutes of driving) ...

This is more visible in summer now happens very rarely but still disturbing me..

Any ideas welcome..







From how I read your post sounds asthough it is missing, have you done you spark plugs and leads?
Before I renewed my plugs and leads I had aslight misfire that hardly showed on the rev Counter...
Hope this helps :y
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 12:25:42
Quote
Could there be any water or dirt in the fuel?


Nearly every week I fill more then half  ..  theoritically its possible ..But I use 97 Ron ..
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 12:27:28
Quote
Quote
its been long time this idle problem make me crazy.. >:(

how you say..Intermittent..

I have changed nearly all sensors CTS, Lambda,Throttle poten.,Thermostat, camshaft,crankshaft etc.

Also ICV changed..

cleaned breathers and all necessary stuff many times..

De-cat, exhaust system completely changed..

Except MAF and air temperature sensor..

Tried carbon clean also..All help..Car is much much better..

But problem is from time to time when the engine reach normal temperature 92-93 and I stop at the traffic

lights I feel engine is shaky, the RPM needle dont move but I feel engine tremble different than normal..No EML

lights no error codes..

if you open the bonnet you can see engine is working differently..But no cough no misfire..

After it heats up totaly its lost (20-25 minutes of driving) ...

This is more visible in summer now happens very rarely but still disturbing me..

Any ideas welcome..







From how I read your post sounds asthough it is missing, have you done you spark plugs and leads?
Before I renewed my plugs and leads I had aslight misfire that hardly showed on the rev Counter...
Hope this helps :y

Thanks Loo-Knee..

I also changed DIS and other stuff.. is it possible to have a new faulty DIS
Title: Re: historical idle problem..
Post by: Darth Loo-knee on 12 December 2007, 12:29:54
Did you change your leads when you changed your DIS Pack?

Did you have or do you have oil in your plug wells? This can cause misfires..

If you did have maybe your Leads are damaged and need changing.....


Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 12:31:13
yep..DIS and spark plugs and also cables changed 6 months ago.. :'(
Title: Re: historical idle problem..
Post by: Darth Loo-knee on 12 December 2007, 12:32:46
And there is no oil in the spark plug wells now? have you check this lately?
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 12:36:31
yep..when I buy the car there was oil ..But gaskets changed and all area cleaned 3 years ago.

nearly 1 month ago I tried compression test..We checked also plug wells .And compressions were OK also..

Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 12:38:32
may be it leaks from the EGR blockage..But in that case it must be visible I think..
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 18:05:35
seems there will be no solution until I change whats left  :-/
Title: Re: historical idle problem..
Post by: ians on 12 December 2007, 18:18:06
Quote
seems there will be no solution until I change whats left  :-/

Mine also has a slight irregularity in idle speed - very slight, not noticable on the rev counter.  I have tried cleaning the ICV but made little difference.  Just live with it now.
Title: Re: historical idle problem..
Post by: ians on 12 December 2007, 18:18:48
Quote
seems there will be no solution until I change whats left  :-/

change much more and you'll have a new car ;D
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 18:24:19
Quote
Quote
seems there will be no solution until I change whats left  :-/

change much more and you'll have a new car ;D

up to now what I pay for parts is more than the price of omega. :'(..

but anyway now I have a new car..(its also newly painted)
Title: Re: historical idle problem..
Post by: Dave-C on 12 December 2007, 18:37:51
Are the throttle flaps closing fully is there any coke in the barrels?  

DC
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 18:42:19
Quote
Are the throttle flaps closing fully is there any coke in the barrels?  

DC

thanks for the interest Dave ..

I cleaned the throttle flaps many times.and there was very little dirt..May be they have little gap between surfaces .But I cant see this directly..

ps : Also checked the vacuum pipes and vacuum tank under the air RAMS
Title: Re: historical idle problem..
Post by: Dave-C on 12 December 2007, 18:47:05
It's very frustrating isn't it! Especially when you add up what you have spent on it to no avail...  Just another point, is the cam timing bang on, maybe worth a check the engine could be unbalanced if the valve are opening a little early or late, if you get my drift..

DC
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 18:56:39
Quote
It's very frustrating isn't it! Especially when you add up what you have spent on it to no avail...  Just another point, is the cam timing bang on, maybe worth a check the engine could be unbalanced if the valve are opening a little early or late, if you get my drift..

DC

yep.this is the one also I'm suspicious about..but the mechanics (more than one) say if timing is not OK the car loose power..How I know it ..this is my first

omega..And seems fast to me..(The duck and its baby story)  :-/
Title: Re: historical idle problem..
Post by: cem_devecioglu on 12 December 2007, 18:59:49
as a possibility can it be MAF as it needs getting hotter on the surface.and its 10 years old  :'(
Title: Re: historical idle problem..
Post by: cem_devecioglu on 27 December 2007, 19:52:32
Today changed MAF.. finally ..

80 kms in city traffic.Many start stops cold and  hot engine  idles..

Smooth idle.No intermittent idle problems or no shakes..seems consumption lowered ..

Within few days the result will be more obvious..Will report here..