R33 Gts-T Runs Too Rich/ Unstable

[jjman]

yes that hose should go into the pipe the MAF is on. it is the cam cover breather hose.

that ticking noise could well be the common R33 timing belt cover resonance sound. very common to get it and for it then to disappear when the cover is off. nonetheless, it would be worth making sure it isn't the cam belt or any other belt rubbing on something or a bearing on its way out.

Finally, it doesn't sound like your BOV is working correctly as it shouldn't be building pressure and dosing that easily from my recollection. stock turbo and stock BOV?

from here you need to plug in with a consult and computer and make sure that the ECU is seeing correct temps (75-80deg when warm) and correct airflow figures as well as you are sure you don't have any boost leaks. often a leak between the turbo and the manifold will cause excessive rich running as its losing air from the system so their is too much fuel for the air that the engine ends up with... = black smoke and running rich.

Edited January 16, 2014 by jjman

[Miksu]

yes that hose should go into the pipe the MAF is on. it is the cam cover breather hose.

that ticking noise could well be the common R33 timing belt cover resonance sound. very common to get it and for it then to disappear when the cover is off. nonetheless, it would be worth making sure it isn't the cam belt or any other belt rubbing on something or a bearing on its way out.

Finally, it doesn't sound like your BOV is working correctly as it shouldn't be building pressure and dosing that easily from my recollection. stock turbo and stock BOV?

from here you need to plug in with a consult and computer and make sure that the ECU is seeing correct temps (75-80deg when warm) and correct airflow figures as well as you are sure you don't have any boost leaks. often a leak between the turbo and the manifold will cause excessive rich running as its losing air from the system so their is too much fuel for the air that the engine ends up with... = black smoke and running rich.

Yes stock turbo and hks type bov like chinese copy or something.. but now everything works , the noise came because i didn't have gasket between CAS and the cover now the noise is gone, but i failed Emission test on idle..

Emissions IDLE

HC - 140

CO % - 1,7

02 % - 6,1

CO2 % - 8,8

Lambda - empty space

Emissions >2000rpm

HC - 58

CO % - 0,2

O2 % - 1,4

CO2 % - 14,4

Lambda 1,03

any ideas?

[jjman]

id say look at the AFM (do a search on faulty afm's)- though off the top of my head I cant remember if the AFM has an influence at idle.

Otherwise, you might find that you have put the CAS back on out of alignment and so the timing is retarded and not burning the fuel properly.

Also do a search on correct checking of the timing with a light (e.g. from plug 1, not the signal wire which can be a bit incorrect).

[Trex]

afm affects startup and idle. It was the first thing my tuner picked up on when i started the car. a new one will make a world of difference.

and you've done the right things to lean the car out. o2, water temp, thermostat. Now I'd be changing plugs, airfilter, and possibly taking it back to stock boost.