First off id like to say I have been a long time subscriber of Scotty Kilmer on Youtube. An I love what you do. Thanks so much.
~ My issues with my mustang at the moment is when I start the car after it has been ran and warmed up it will stumble and miss almost like it's getting a bad spark from coil. Goes away soon as I touch the throttle for a few seconds. Sorta notice when it's humid out it lacks power somewhat but that may just be me. Also the previous owner never had a pcv valve in it until I put one in it on intake/passenger side. The car has about 170k on the motor. Just got a new battery and fixed the ground on it. Replaced the fuel filter and water pump. I replaced the water pump because it had a chirping noise that wouldn't go away. Here it was the bearing in the Camshaft synchronizer,just added a little oil went away.
Also I have new platinum plugs an wires. No codes on the car other than every so often I was getting a bank 2 sensor 1 code. Was a header leak or from the pcv valve not being there. Fixed one header leak now there is a small one on the other side.
Someone said something about the coolant temp sensor getting an air bubble?? Shouldn't be any vapor locks that I am aware of. Not sure if that has anything to do with the miss tho. Fig it may be the coil pack ? Have checked the primaries once a while back.. 1.6 1.6 1.0 it's a waste spark coil as I know you are aware. Why is the one by the connection always lower on most ford mustangs?? Is this normal ?
~ Also I am having an issue with a stumbling idle when the motor for the cooling fan comes on. Is this a sign of a bad electric motor on my fan? My over flow coolant jug is super full an have no leaks.
Any advice is much appreciated thanks :)