MARTYN WRX94

On my recent MOT the co2 reading was off the scale!!!! anybody with an idea whats wrong HELP!!!

johnnyroper

any more info?
what car,how old,any mods,does it have a cat etc?

34srm

wot were the reading carnt see it being off the scale are is that a garages way ov saying its gonna be expensive

merlin24

iTrader: (1)

A high CO2 reading is good - it shows the air/fuel ratio is or close to Stoichiometric ( 14.7:1).
If you compare the CO,HC,O2 and NoX readings along with the CO2 reading - its always a good way to narrow down combustion problems,poor running,misfiring etc.

Regards,
Mick

MARTYN WRX94

car is 93 wrx import
mines ecu
walbro fuel pump 255lph
sard indution kit
arc top mount intercooler oversized
3" stainless steel exhaust turbo back with sports cat
co2 was 8.76!!!
hc pass
lambda pass
car runs fine no misfires or boost problems just extremly rich only 240-300 km per tank
car still got through test. know the tester but he said get it sorted for next years test!

Welloilbeefhooked

iTrader: (3)

Could it be a leak in the exhaust system between the heads and turbo, ie the headers?

Mine did this and it was a set of cracked aftermarket headers. I did not hear the blow due to the exhaust wrap.

Also, the mileage per tank seems about right for a scoob.

Wayne.

chrisola

240-300 miles per tank is about right, not KM surely? Thats like 150-180 miles a tank...well i guess if its a high bhp monster! :P