During the past few days, my car's been running a little jerky at low revs and not pulling as before at the higher end. Ran diagnostic today and the ECU threw up codes 33 and 34 :( . Unplugged and cleaned the O2 and det connectors and reset the ECU but the codes are still there. Warmed and ran the engine at 2000RPM for a few mins in Mode II and the LED didn't flash at all, indicating exhaust gas is lean on the left side sensor, I guess. Right side sensor flashed 5 times, so I guess all is well on this side. Didn't try any voltage readings, as I haven't got the equipment or the know-how.

 

So what do I do next, short of buying and fitting new sensors? Just prior to the problem, I had my boost controller replumbed by SE and am not sure if this has anything to do with it. Pete did think that I might have a minor intake leak on the driver's side that would need further exploring. Again, I'm wondering whether this may also effect the O2 sensor readings. Still waiting for Pete to return my call.....will try again tomorrow. In the meantime, any ideas and comments will be much appreciated.

Hi Shahid,

 

Make sure you have the connectors on the right way. If I remember rightly the det sensor connnector and the left 02 sensor connectors are right next to each other.

 

Vijay

Cheers Vijay - will look in to this tonight. Are there any tell tale signs to confirm correct connection?

OK - tried Vijay's suggestion but still no luck and still getting the codes. Anymore ideas or recommendations please?

OK - tried Vijay's suggestion but still no luck and still getting the codes. Anymore ideas or recommendations please?

Could well be a boost leak mate. These can come on suddenly and cause the symptoms you are observing. Also, the mixture will be too lean at idle as unmetered air will be getting drawn into the system.

 

Check everywhere for leaks is where I'd start.

I would personally try and sort one out at a time. I would see if the 1 mega ohm resistor sorts out your det sesor circuit first.

 

Do you have a Conzult near you?

 

Vijay

During the past few days, my car's been running a little jerky at low revs and not pulling as before at the higher end. Ran diagnostic today and the ECU threw up codes 33 and 34 :( . Unplugged and cleaned the O2 and det connectors and reset the ECU but the codes are still there. Warmed and ran the engine at 2000RPM for a few mins in Mode II and the LED didn't flash at all, indicating exhaust gas is lean on the left side sensor, I guess. Right side sensor flashed 5 times, so I guess all is well on this side. Didn't try any voltage readings, as I haven't got the equipment or the know-how.

 

So what do I do next, short of buying and fitting new sensors? Just prior to the problem, I had my boost controller replumbed by SE and am not sure if this has anything to do with it. Pete did think that I might have a minor intake leak on the driver's side that would need further exploring. Again, I'm wondering whether this may also effect the O2 sensor readings. Still waiting for Pete to return my call.....will try again tomorrow. In the meantime, any ideas and comments will be much appreciated.

 

Hi Sh,

 

How are you doing? Did you get this sorted out?

 

Thanks again for the lift mate - still owe you that pint.

 

Ch

Yes mate. :dance:

 

One O2 sensor was completeley knackered so replaced both. (Very cheap from Courtesy with the current strong pound) :) . Fuel economy is a little better but the car pulls a lot better and smoother at low revs. As Mike and Vijay suggested, I did have a boost leak and I didn't appreciate what a huge impact that has on performance and general running. Also, the internals of one of my back boxes was completely gone. Thanks to Pete at SE for sorting it all out.

 

How's your car with the new turbos?

Yes mate. :dance:

 

One O2 sensor was completeley knackered so replaced both. (Very cheap from Courtesy with the current strong pound) :) . Fuel economy is a little better but the car pulls a lot better and smoother at low revs. As Mike and Vijay suggested, I did have a boost leak and I didn't appreciate what a huge impact that has on performance and general running. Also, the internals of one of my back boxes was completely gone. Thanks to Pete at SE for sorting it all out.

 

How's your car with the new turbos?

 

It's like a new car again! It cost quite a bit, but she's running extremely well now - I thought for a while that I'd broken a piston but all turned out well thank God - would have had to sell her otherwise! I'm expecting my new spoiler from Luke soon - can't wait!