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[Marks DTM Calib]

The ideal would be to connect Tech2 up and check the ECU coolant temp reading....

[moorej91]

Thanks again for all your replies. When I was younger I used to work on cars with my dad since I was 5 (now in forties), I was very used to old technology. Fourtunately over recent years I have had reliable cars and not had to do anything to them. The omega seems very complicated and without the right equipment very hard to find the problem.

A very good point from grumpy, he mentioned about sensors and mixture and one thing that did cross my mind is that when I first start the car up there is quite a strong smell like petrol, although this does go. Also my back box on the exhaust has gone (the pipe at the back of the rear silencer has come out) could this also have something to do with it? Saying that the exhaust has been gone for a while and not given me this trouble. Going to have a look at the car now and will get back to you.

Have a nice day!

[Markie]

The ideal would be to connect Tech2 up and check the ECU coolant temp reading....

Aye....you and Jamie dont fancy a haggis fuelled trip to investigate mine in Scotland do you  

[moorej91]

Could anyone tell me how much the coolant sensor is and are they simple to fit? Would it be worth changing this anyway? I have someone coming to do a service on monday and change all filters etc,
Just going to check car now.

[cem_devecioglu]

Thanks again for all your replies. When I was younger I used to work on cars with my dad since I was 5 (now in forties), I was very used to old technology. Fourtunately over recent years I have had reliable cars and not had to do anything to them. The omega seems very complicated and without the right equipment very hard to find the problem.

A very good point from grumpy, he mentioned about sensors and mixture and one thing that did cross my mind is that when I first start the car up there is quite a strong smell like petrol, although this does go. Also my back box on the exhaust has gone (the pipe at the back of the rear silencer has come out) could this also have something to do with it? Saying that the exhaust has been gone for a while and not given me this trouble. Going to have a look at the car now and will get back to you.

Have a nice day!

engine problem is not related with exhaust leak..Only will make noise..

CTS is not expensive ..

[TheBoy]

The ideal would be to connect Tech2 up and check the ECU coolant temp reading....

Aye....you and Jamie dont fancy a haggis fuelled trip to investigate mine in Scotland do you  

I'm sure we could meet halfway, ie Lakes, around mid June

[Talk_Converter]

Just wondering if this is related to my old Carlton fault, lovely idle but no guts from then on, really lumpy and no speed. Did a full service and checked everything you can think of (ECU, sensors etc.) and found no fault so we removed the lambda sensor and car ran better with the hole unplugged. So we checked the Cat and found it virtually blocked. Temporarily removed Cat and car went like a dream. Might be worth a check if you can't find anything else wrong and need a straw a grab!

[moorej91]

Someone mentioned that you get a smell like rotten eggs if the cat has gone. As I said before there is a smell especially on start up.

How do you check the cat? How do you bypass thecat to check?

Thanks

[Talk_Converter]

Usually get that smell when Cat is new, my Cat certainly gave no warning of blockage except for the bad running of the engine. Sometimes it would not be too severe but at others it was really bad, car could not get up steep hills! The Lambda sensor is placed before the Cat so its removal allows some of the exhaust gases to escape through the threaded hole.
Enough to maybe prove if the car is now working better, it will be quite noticeable albeit a little noisy  . If car runs a lot better then suspect blocked Cat. The Lambda sensor may be a bitch to remove, it seems easier to shift if the exhaust is warmed up a little first.

[moorej91]

If the cat was blocked would that not make the engine uneven when cold also?
Have also seen on ebay a tech 2 interface and software. Does anyone know if these could check things like sensors or is it just a code reader or are they the same thing.

http://cgi.ebay.co.uk/Vauxhall-Opel-tech-2-OBD-Diagnostic-CAR-Code-Reader-PC_W0QQitemZ230213857168QQihZ013QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[dharstay]

these symptoms are identical to mine. i also have checked plug wells etc and paperclip test shows no codes.replaced ht leads as well. going to check coolant temp sensor when rain clears. is there any thing i need to use to clean it up?

[moorej91]

Hi, Thanks for your reply. I took my car into Vauxhall last week and they did a diagnostic check and found no faults. That was £57.50 gone. Because of that they checked the spark plugs. They said there was water by the plugs (not in engine) and they were the wrong plugs. I have had the car for 10 months now and have had no problems with starting or running. They said that is all they could find. They changed the plugs dried up the water and

Success problem solved

Thanks to all and hope this helps others.

Great forum

[bertiecbx550]

i`ve just seen this thread and it sounds like the prob i had with mine if it comes back again try changing the fuel pump/injector relay thats what cured mine...

[Guglielmo]

Hi just fixed mine, was the dreaded cam sensor. £10 from ebay and 15 minutes fitting and runs as good as new again.