got a code 44 lean exhaust, ecm seems to stay in open loop,integratr at 128,block learn 150,iac 38,spark advance 36,coolant 177,maf 6,02 crosscounts 0,any help? I was thinking of a vacuum leak, bad egr,coolant sensor,02 sensor? i do have noticed a small leak at the left exhaust mani...but i...