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[Doctor Gollum]

Following from my previous post, I have found no evidence of air leaks pre or post combustion.

Two can of Wynns Injector Cleaner and two tanks of V Power.

Live data is as follows, (car up to temp):

1. Bank 1 Closed Loop.
2. Bank 2 Closed Loop.
3. Load Value 22%.
4. Coolant Temp 80°C.
5. B1 STFT 0.8/-1.6%.
6. B1 LTFT 10.2%.
7. B2 STFT 0.8/-1.6%.
8. B2 LTFT 11.7%
9. Inlet Manifold Absolute Pressure 0.0 kPa.
10. Crank speed 684/702.
11. Vehicle Speed 0.0 Mph.
12. Ignition Advance -12°.
13. Intake Air Temp 24°C.
14. Air Flow 4 g/s.
15. Throttle 2%.
16. Secondary Air Off (not installed from factory. Wiring present but plugs blanked from build).
17. B1S1 Output 0.090/0.770 V.
18. B1S1 STFT 0.8/-1.6%.
19. B1S2 Output 0.000 V.
20. B1S2 STFT 99.2%.
21. B2S1 Output 0.090/0.740 V.
22. B2S1 STFT 0.8/-1.6%.
23. B2S2 Output 0.000 V.
24. B2S2 STFT 99.2%.

Ignition retardation (negative advance), B1/2 S2 voltages stand out as unexpected.

Increase the RPM to 2,500 and the Ignition drops back to - 39°.

Any values with two numbers are the extremes of the fluctuations, generally sitting in the middle.

[dave the builder]

both post cat lambda  are doing diddly squat  zero volts
LTFTs high

[Doctor Gollum]

No codes though

Also it was imported, if that would have a bearing on the number of sensors?

[dave the builder]

No codes though

Also it was imported, if that would have a bearing on the number of sensors?

LTFTs don't throw a code until 20% (on cars i've played with)

are the pre and post cat lambdas the same plugs ? as in could you swap the electrical plugs over to test the sensors  easily

[dave the builder]

also MAP "Manifold Absolute Pressure 0.0 kPa." is that running ?

[Doctor Gollum]

At 700 rpm, I would hope so

Front sensor plugs are on the fire wall, rears not visible from above, so presumably within the gearbox loom

[dave the builder]

well the MAP should have a reading of NOT zero  running unless it's not in the fannymould and just dangling or massive airleak or duff sensor .

can you look on 7zap or similar to see where the plugs for post cat o2s are and if they are the same part numbers or interchangeable/cable reaches ?

or ECU  pinouts to test ECU end ?

[Doctor Gollum]

We're presuming it has one. It could be that the code reader software expects one but there's not one fitted.

Certainly there's no evidence of one on the manifold/plenum... Just the MAF and TB.

Again no code and no airleak because the idle is normal. 

Will check the IPC with the chassis number.

[Doctor Gollum]

No MAP sensor unless supercharged or US market

No post cat sensors either...

Both 2001 MY onwards 

Certainly explains the lack of codes/EML.

[Marks DTM Calib]

If Lambda is good and post cat Lambda the same, car up to temperature and operating closed loop, with the mixture control Lambda switching about every second, and its failing on CO's then its most probably knackered CATs

[Doctor Gollum]

In which case, at least it is pre 2001, so any old shyte will suffice 

I need to physically check underneath that whether it actually has rear sensors.

[Marks DTM Calib]

MOT emission result will also give an indication

[dave the builder]

I wouldn't fit non type approved cats unless you are just getting an MOT to offload the car 
even then a non type approved cat may struggle to even get you past the test if the car is overfueling .
No vac or zorst leaks you say, have you checked the common link ,the EGR  assuming it has one ?
10% plus LTFT seems high to me assuming you reset the trims and it returned high
long term overfilling will rape the cats
with no post cat monitoring ,they could be ******

MOT emission result will also give an indication

I asked ages ago on another thread  the actual values would help if available agreed 
if you're paying for MOTs or pre MOT emmission tests DG the NT should print you out a result

[Doctor Gollum]

I should have made a note of them. The pretest was a bit last minute as they had booked me in for the wrong day.

Will see if I can get another test done but looking at a replacement today.

[dave the builder]

I should have made a note of them. The pretest was a bit last minute as they had booked me in for the wrong day.

Will see if I can get another test done but looking at a replacement today.

OK, hope that pans out well for you DG