Hello,
I want to thank you guys for helping with the p0405 code problem that is gone now I have 2 codes that came up p0307 and p0316 I am going to replace the # 7 plug and coil hope that takes care of that but what do i do about 316 code. How much vacuum should there be at the pcv valve I am on the 3rd one in 1-1/2 years. That doesn't seem right to me. The engine is running real rough between 45 and 60 so bad it shakes the whole truck. Please help need the headache's to go away. Thanks