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1

Omega General Help / Re: Uneven idle - what to test next?

« on: 19 November 2010, 09:07:23 »

New gasket, spark plugs and MAF in place!

Still the same problem with revving at idle tho. Im running out of ideas of what to do next

2

Omega General Help / Re: Uneven idle - what to test next?

« on: 27 October 2010, 10:58:45 »

Parts ordered! Big thanks for all the help and to AndyC for great prices. The parts turned out to be 1/3 as costly as the local dealer estimated.

I'll update the thread when the job is done.

3

Omega General Help / Re: Uneven idle - what to test next?

« on: 22 October 2010, 17:34:04 »

Update: Tried unplugging the MAF sensor while it was idling unevenly. The rpm dropped from 1100-1700 to a somewhat steady 500. The sound wasnt all that steady, but the rpm didnt vary much.

I also finally managed to paperclip it. The only code i got was 0100, which according to TheBoy (http://www.omegaowners.com/forum/YaBB.pl?num=1206569945) is the mass flow sensor. However, i did this after I had disconnected the MAF with the enigne running, and I'm not sure if this is the cause of the error code.

So I'm guessing the uneven idling is caused by a faulty MAF sensor. Tried cleaning the filament with start gas, which resulted in a minimal improvement. Might be my imagination tho  :-/ Anyone know where I can buy one cheap?

As for the oil leak in the plug well, I've taken some pictures to keep the thread interesting. Camcover gasket change needed?

4

Omega General Help / Re: Uneven idle - what to test next?

« on: 21 October 2010, 17:50:09 »

Progress: EGR blocked. It didnt seem sticky but I blocked it anyway once i had it out. Didnt improve the idling tho

I also checked the spark plugs and found large amounts of oil in the spark plug well. Could this have been caused by clogging of the small breather hose or is this a sign of something more sinister that should be dealt with?

Abiton: Yea, the bulb is ok. If I turn on the ignition without the paperclip inserted, the engine light is on. As I insert the paperclip it disappears. Should it be blinking 1-2 1-2 ? And yes, the butterfly closes completely.

Ill try to check for air leaks tomorrow. Any tips of how i can do this? Any areas i should investigate closely?

I was also wondering if there is any way to chech the mass air flow sensor without actually replacing it?

5

Omega General Help / Uneven idle - what to test next?

« on: 20 October 2010, 20:31:22 »

Hey,
ive been having experiencing very uneven idle on my 1996 2.0GL. Its fine for a minute or two after i start it up, but after that it revs between 1100 and 1800 ca.

I have cleaned the throttle valve assembly (as described here http://www.omegaowners.com/forum/YaBB.pl?num=1207387811) and the the jet under the throttle housing. This only made it more annoying, as the it revs faster now.

I have also tried the paper clip test, which gave no result. Hopefully no blinking means no fault signals stored(?).

I am know in desperate need of advice of what to do next, as im on a tight budget at the moment. Could cleaning and/or blocking the EGR valve help?

6

Omega General Help / Re: omega 2.0 16v running problems

« on: 21 October 2010, 19:11:18 »

Agree with auto addict. Im having similar problems and cleaning the IACV and throttle housing is the best place to start.
Guides:
http://www.omegaowners.com/forum/YaBB.pl?num=1194007453
http://www.omegaowners.com/forum/YaBB.pl?num=1207387811

7

Omega General Help / Re: HBV change on a 4 pot

« on: 21 August 2010, 11:53:35 »

I’ve had another go at it and I think you guys were right about not having an HBV, unless it is placed behind the fire shield. None of the tubes led to anything resembling the HBV.  I did however find the source of the leak, which is a tube coming down just behind the exhaust manifold. Pictures do a better job describing where it is. Next time I’ll try to fix a problem, I’ll be more thorough diagnosing what is wrong 




Does anyone know where this tube is coming from? It does not seem to have been connected to anything nor does it seem broken. It just ends and leaks coolant when the engine is warm, especially when the heater is turned off. The leak decreases as the air intake on the heater is increased and seems unaffected by temperature settings. 

8

Omega General Help / Re: HBV change on a 4 pot

« on: 20 August 2010, 21:22:06 »

Thanks for the replies!

philrich: The car is a left-hand-drive (as I live in norway) and the brake servo is place at the far right, looking from the front. The picture shows the engine compartment, with the brake servo (not visible) behind the brake fluid container.


Are there any other leads I can follow? Where do the tubes connected to the HBV go?

Charlie: Yes, the car has an aircon system.

9

Omega General Help / HBV change on a 4 pot

« on: 20 August 2010, 19:52:51 »

Hey, this is my first post. I just bought a 1996 2.0 Omega GL and have started to fix it using some of the excellent guides on this site.

Recently, I experienced loss of coolant and the symptoms matched that of a faulty HBV. Found a guide on this site (http://www.omegaowners.com/forum/YaBB.pl?num=1193594464) and decided to try to replace it myself. 

However, I quickly realized that the job is different on a 4-pot. I already got the scuttle off, but quite frankly, I simply can’t find the thing. Anyone got any advice?