hi guys my car went in for an MOT today failed!!! 19 failures. and one of them was the co2 level it's supposed to be 3.50 and mine was..................9.84 how the hell am i going to lower that? HELP

 

the c,o screw on the ecu

 

check all basic settings, then check all sensors, i would look toward ect ,and map sensors first

 

by doing that ,you adjust a percentage of the whole map ,so the car may melt at peak boost if it was set like that to prevent that from happening,

thats the thing if you have a bad chip, the idle co could be high as you cant adjust the top and bottom fuelling seperatly

 

the thing is am i going to need to have it set up again after the mot? especially if im going to be messing around with fuel? at a guess would you say its likely to be the ecu or a dodgy map sensor?

 

it could well be a bad sensor, if the car was correctly set up ,before this problem it wouldnt have been like that then

well not if the tuner is worth anything

it could be ect, engine coolant temp, sensor, if the ecu thinks the car is cold all the time it will overfuel

 

i ment adjust for the M.O.T then turn back..........

 

and live with the borewash and poor fuel ecomony?

it has a problem, and needs fixing

 

cheeRs guys i'll have a good look tomorrow its not something i can do anyway it'll have to be done when when it goes back.

 

........he just wanted to get it through a fookin M.O.T........he cant take it anywhere if it hasnt got one....

 

just dont let them simply wind the fuelling down ,as it WILL weaken it on boost aswell, and your engine could so easily melt, if in any doubt book it into a proper tuner, dont let a mot center bodge it, its not worth it mate

 

it will go straight in to a tuner as soon as the mot is done i aint risking it.

 

imo you would be lucky to knock 6 or 7% of the co on the global adjuster anyway,

im not into bodging fuelling on cossies ,ive seen to many melted pistons because of similar things to this ,all because people mess about with fuelling,

a simple miss adjustment could mean this engine goes for scrap,

 

what spec is the car? what software?

 

what chips in it

when i put my chip in mine my co went through the roof and failed on mot emissions was something stupid like yours

major bore wash

ive turned it down to 3.5% now and fuelling seems ok now my gauuge is alway in the green anyhow when on boost

but still id get it checked out

 

I've got a similar problem with mine at the moment, but i haven't got a clue what chip is in mine so would a chip from MSD help in anyway or am i better taking the car somewhere? Bearing in mind i'd have to trailer it.

Mine is as also a 4x4 with stage 3 bits but still on a T3 - just incase the spec helps in anyway

 

any good chip will be fine, the most important thing is the tuner who writes the chip should give you all the base settings ie fuel pressure, so you can check all is correct ,before you go hunting for sensor faults

though ,ect, and map sensor are favorites, ect just fails and reads cold all the time ,and the map sensor normaly gets wet and goes tits making the ecu think the engine is under load ,dumping loads more fuel in, aswell as poorly set up cars ,ie habing the fuel pressure wound up etc etc also cause major problems,

its worth getting a pro to set them up properly ,the car will perform better, drive better, and be soooo much better on fuel, not to mention having massuve impact on engine life

 

Cheers, i'll get a decent chip ordered then. It will be getting set-up by a pro as soon as it's MOT'd and on the road again

 

what was the co last mot, one would assume it was no higher that 3.5 %
what have you changed since I'd be looking at inlet manifold gasket leaking and act sensor if it was on that set up last mot

 

this is my first mot with this car. i have no idea what chip is in it but it is running stage 1.

 

Get closed loop too if you get an MSD chip m8.

 

ahh , closed loop cars run so clean, lets just hope nobody ever trys to comitt suicide by gassing themselves with one of these cars ,as all you get is steamy eyes

 

what year is your 4x4
all late 4x4 sapphs had closed loop lambda as standard

 

yeah mine did on a K, all msd software now

 

Mines a K too

Its my first MOT with this car too

 

manifold gaskets leak act sensors fail

 

Me too.

 

First thing i'm going to do though is change the chip, as i know it is rich anyway so hopefully that will help