Egt and coolant temp

[Fordfan90]

I know with me I was having problems driving around town with my truck because the fan was always locking up on a 90* day. I have now figured out that was mostly due to a massive exhaust leak I had at the slip joint on my up pipes. I gained 2 mpg .5lbs of boost and my coolant temps stay down because I am using all of the air i have instead of losing drive psi. something to think about.

Well I got the timing set and I had an exhaust leak on the down pipe. Now it driving better seeing 15psi of boost with no smoke maybe a little haze at full throttle. But now my vacuum pump is leaking oil?