reducing emission - mondeo

[brucer]

have you got the readings it failed on? i deal with mot emission failures all the time at work so let me know, sure i can point you in the right direction.

[draper]

COs - .579%
HC's - 467

natural idle test was aborted
lambda passed ok

[brucer]

id try coolant sensor. its running rich, so id imagine the sensors sayin the engines cold still. You can check the resistance across the two terminals to see if its faulty, resistance should be low 2500-3000 ohms when cold and anywhere below 500ohms when hot.

There is a way of checking the volts rathr than resistance, which i cant thnk of off the top of my head. Lol.

The resistance check isnt always a guarentee to show its faulty.

[Sloth]

we used to suffer with avensis 2.0 petrols having high emissions. toyotas fix? a 10p maplin resistor in the wire to the ecu from the coolant sensor. (it went low resistance when cold to high when hot.)

damper, borrow some trade plates and thrape its tits in in 2nd and 3rd gear. whack new plugs in, and it will help. i had the same issue with the celica, and took it to a mot station 45 miles away, booked of course, on the way hammering its brains out. it passed by miles.....

[brucer]

giving cars a thrash before an mot doesnt help his type of fault. The reason for the thrash is to get the cat hot so it reduces the co2. Which is the more common failure.

[Ben]

giving cars a thrash before an mot doesnt help his type of fault. The reason for the thrash is to get the cat hot so it reduces the co2. Which is the more common failure.

Quite right! But boy does it work

Damper you can buy some addative ****e for about a tenner which helps too.

[draper]

id try coolant sensor. its running rich, so id imagine the sensors sayin the engines cold still. You can check the resistance across the two terminals to see if its faulty, resistance should be low 2500-3000 ohms when cold and anywhere below 500ohms when hot.

There is a way of checking the volts rathr than resistance, which i cant thnk of off the top of my head. Lol.

The resistance check isnt always a guarentee to show its faulty.

ill have a try mate - thanking you

[draper]

update for anyone thats bothered, its still failing on the CO2 misxture, still at .500%

ran 2 botlles of additive through it now, thrashed damper style to the MOT station twice and even ran to blackpool and back so ill be testing/swapping the CTS this afternoon

[C612DNM]

Sounds like the Coolant Temp sensor.

My old Omega MV6 used to take ages to get past the test. When it was ready to boil, it'd pass - even though plugging an an OBD reader for live data showed coolant temp not much higher than arctic!