im not sure whats going on but last night it was raining hard and next morning when i try to start the car..it starts but my wideband is reading extreme lean then it stalls almost... i do have open vent on my hood but i been running like that for three years so i doubt it be the problem this time... i did wipe down everything just in case...check all connectors...all clamps are tight...check then spark plugs... its really white so its running really lean... im not sure what could be the problem..CEL light is on but i have no way of checkin it at the moment...try resetting my ECU..it did not help..i tried holding at higher rpm at idle...but the car will studder and almost stalls..doesn't help....need advices fast!!!

 

boost leaks cause the car to run lean at idle, or any vacuum conditions for that matter. once you achieve positive pressure it will run rich.

have you checked for boost leaks lately?

 

its only at cold starts...it ran just fine yesterday...just after the rain...it started screwing up....even when i get the car warm...it still runs lean at idle...17:1+

 

Is your air filter wet?

 

no air filter is not wet..i have a box for it so its fine... i changed spark plugs few days ago and i put my old one in for a try...same thing.... it would idle 15:1 for a few then to 17:1 the slowly back down to 13:1 then slowly goes up to 17:1 then car stalls....