Hi there, i have a 2003 pontiac grand am Gt sedan with the 3.4 and factory equip ram air option. i recently installed a cold air intake and am now having problems. when the car warms up to operating temp (bout 100 celcius). Its idle starts jumping from 400-1100 rpm. And under load the car runs strong but in park or at a light it flutters. when the car is at any temp below that, it runs like a dream. i keep getting code P0131 as a lean o2 sensor, sensor 1 bank 1, have replaced it and am still tripping that code. i get a whiff of sulfur smell from the exhaust every now and then too. i was very careful with the MAF and air temp sensors when the CAI went on as well. would they cause these problems? lots of grand ams have this particular cold air setup and run without a problem. any info on what might be happening would be greatly appreciated!
Aug 10, 2009 at 12:12 AM
