Getting Emissions Right

[bigeal 0]

My 205 Cti failed mot on emissions,I tried all the normal things air/fuel mix,injector cleaner,engine flush,it wont pass,runs beautifully,its a 309 1.9 engine

[Anthony 1,003]

What were the results? CO and HC?

[bigeal 0]

What were the results? CO and HC?

hi Anthony ,CO level 9.84% FAIL

HC level 1150 ppm Pass

[Anthony 1,003]

They're both too high to be honest, assuming its a standardish engine. Should be around 1-1.5% CO and 200-400 HC really.

 

If you've would the mixture screw out (anti-clockwise) on the AFM out with no success, then chances are that either the AFM or ECU temp sensor is shot. Probably best laying your hands on a known good AFM, and replacing the ECU temp sensor with a new one as they're only a tenner.

 

However, seeing that you've got a 1.9 engine in what I assume was originally a 1.6 CTi - have you used the matching 1.9 ECU and AFM along with the engine? If you start mixing 1.6 and 1.9 fueling/management parts (ie injectors, AFM, ECU) then the fuelling it typically a fair way out, and certainly using 1.6 AFM/ECU and 1.9 injectors would make it run rich like yours is doing...

[bigeal 0]

They're both too high to be honest, assuming its a standardish engine. Should be around 1-1.5% CO and 200-400 HC really.

 

If you've would the mixture screw out (anti-clockwise) on the AFM out with no success, then chances are that either the AFM or ECU temp sensor is shot. Probably best laying your hands on a known good AFM, and replacing the ECU temp sensor with a new one as they're only a tenner.

 

However, seeing that you've got a 1.9 engine in what I assume was originally a 1.6 CTi - have you used the matching 1.9 ECU and AFM along with the engine? If you start mixing 1.6 and 1.9 fueling/management parts (ie injectors, AFM, ECU) then the fuelling it typically a fair way out, and certainly using 1.6 AFM/ECU and 1.9 injectors would make it run rich like yours is doing...

Thanks ,I will check that out,one thing the MOT tester checked it as a 1.6 ,he said it made no difference that it was a 1.9

[Anthony 1,003]

The limits for the MOT are the same for both a 1.6 and 1.9 - 3.5% CO and 1200ppm HC.

 

However, if you mix and match 1.6 and 1.9 parts, the fuelling is wrong and that will have an impact on emissions.

[mr_exe 1]

I'd suggest an oil change, if the cars has been running too rich then there will petrol in the oil. That should bring the HC's down.

[bigeal 0]

I'd suggest an oil change, if the cars has been running too rich then there will petrol in the oil. That should bring the HC's down.

Thank you,but I did flush the engine and replace the oil