Hey all, pretty new to the tuning jsyk. I recently put a stock engine back in my 02 Silverado. Couple issues I'm having are very high idle on start up, like 16 to 1700. Idle will slowly come down to about 1000 but wont come down to 750 until the engine temp is around 130. The truck still has headers full dual exhaust and cold air intake. I'm guessing these are causing the idle issue. I had a tuner look at my tune and he said it adding fuel across the board and to add 8 to 10 percent. Can't get in touch with him anymore so my question here is where or what scale do I add the fuel. Any help would be much appreciated. Thanks.