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[Ludvig]

Hi all,

my 2003 Omega 2.2 has a temperature related health problem.

In hot weather (outside temp. over approx. 25 C (77 F)) the engine sometimes loses power. It still runs but is very sluggish. Sometimes when this happens, the ECU light also comes on when starting up the engine. But not always.

The same thing can happen also in colder weather when the engine temp is somewhere between cold and normal running temp, i.e. when I´ve driven only short stretches.

The outside temp sensor that feeds the onboard computer gave up a few moths ago, so I fitted a new one. I don't know if the ECU gets the outside temp from the same sensor. Anyway, the power loss problem is still there.

Any ideas?

Ludvig

[mathewst]

Do you think engine management light?
something similar happens to me, but it doesn't depend on the weather but on the fact is the engine hot before being turned on.
If this is the case I believe it is the Cam sensor that can be the problem, well in mine it is cause "My Naff Code Reader" says so.
When this happens I drive a couple of meters, turn of the car and start it back on and afterwards it works normally.

[Ludvig]

Thanks for the tip Mathewst!

The engine management light sometimes comes on when this problem occurs, but not always.

It also sometimes helps to switch the engine off and restart it, but it doesn't work every time. But leaving the car for an hour or so usually helps.

Any other suggestions?

[924boy]

you need to find out why the engine management light is coming on, probably a sensor out somewhere! 

[Ludvig]

Yep ,a faulty sensor seems probable. Are the error codes stored, or can they only be read when the engine management is on?

[mathewst]

Well you'll need to get the codes read, this you cannot do yourself, but will need to go to the car service. Paperclip test doesn't work on 2.2 petrol. It will probably be camshaft sensor like I said.
If it is this buy original part ( I bought replacement and then the car didn't want to work normally at all).

[feeutfo]

there was a thread recently, a couple of members confirmed that the pedal trick worked on their 2.2 cars. It seems some work and some dont. Worth a try?

[cem_devecioglu]

imho,at first look cam and maf sensors seems suspicious..

but for an exact definition , its necessary to read the error codes ..

have you seen the car goes better at specific temparture ranges, or it just becomes sluggish when its very hot outside ? edit :canceled as you mentioned about it..

[Ludvig]

Thanx for all your tips guys! 

Does anyone know if the error codes are stored? Or do they need to be read when the engine management light is still on?

I was planning to go to either Croatia or southern France on holiday, but I guess the temperature will be over 25 C down there and the Omega is going to be tired 

[924boy]

the ecu stores the error codes! 

[cem_devecioglu]

Thanx for all your tips guys! 

Does anyone know if the error codes are stored? Or do they need to be read when the engine management light is still on?

I was planning to go to either Croatia or southern France on holiday, but I guess the temperature will be over 25 C down there and the Omega is going to be tired 

error codes must be stored.. and without solving the problem your miggy will cause headache..

[Ludvig]

Thanx for the help guys!

I'll simply have to go down to the dealer and ask them to read the codes (or try the pedal trick). I hope it'll be a sensor that isn't too tricky to replace. 

[mathewst]

Cam sensor is very easy to change if you have the proper tools, maf sensor I think is also. If you don't have the tools the garage shouldn't charge you much cause it takes some 15 minutes to change the cam sensor
P.s. If you come to Croatia I think you'll like it.  I live on the adriatic coast

[Ludvig]

I hope it's the cam sensor then. I guess the crank sensor is a bit more tricky to change.

I've heard so much about how beautiful it is in Croatia so I figure I need to go down there one of these days. In the Omega, of course  8-)