Hi I got an xr6 turbo about a month ago it was going good for the first week but had a slight miss on idle then I changed the plugs and gapped them right,change the coolant and oil aswell I took it up the road for a spin and it boosts fine in first but when I change to second and hit it it's like it's not runing on all cylinders proply like it's running out of fuel so I put a new fuel pump in change the fuel filter put new coils in put another set of plugs in and still has slight miss it's pissing me off I also got it diagnoised and it came up with these codes P0172 - System to Rich (Bank 1) P1506 - Idle Air Control (IAC) Overspeed Error Anyone had this problem Also if I slowly excelerate on to boost it doesn't do it But some times it's like it's not boosting need help
