Afternoon all,

Went back to vehicle today and here are my findings as requested:

Fault Code PO170 stored

Freeze Frame: Load 2%, ECT 92 degrees C
5 km/h, STFT 13.5%,
LTFT 0.8%, 800 rpm.

Emissions on arrival: 0% CO, 0ppm HC, CO2
16.1%, 02 0.3%

Fuel Trim on arrival: STFT 21.1%, LTFT 2.3%

Emissions after EML cancelled: o% CO, 20ppm
HC, CO2 12%, 02 5.8%
(These figures returned to normal after about 15 mins)

Fuel trim after EML cancelled: STFT 25%,
LTFT, -0.8%. (STFT dropped to 21% after 15
mins.)

Lambda sensor on arrival was switching
normally according to scanner (ACR4 G2) and
verified on probe. Scanner however
indicated a lean mixture even when blipping
the throttle. After cancellation of EML,
sensor stuck at about 0.2 and normalised
15 mins later.

MAF showing 1.4v and 1.2 g/s at idle and
approx 1.8v and 4.0 g/s at part idle.
These figures were more or less the same
before/after EML cancelled.

Unable to conduct fuel pressure check (no
schrader valve). Unable to conduct
injector duration check. (Forgot to pick
up my meter but will return if necessary).
Having driven the car, I do not feel there
is a problem with fuel pressure.

So there you are. The vehicle has been smoke tested, tech 2'd, Tank ventilation checked (removed fuel cap when testing), Vac hoses intact
and cannot see any exhaust leaks on down pipe.

If there is any other info you require, then I will be happy to make my 10th visit to this little beast!

Regards

Pete M

PS. Nearly forgot. This vehicle has already had two MAF sensors and 2 pre-cat Lambda Sensors fitted. The sensors now fitted are genuine Vauxhall items