Map sensor reading goes from 35kpa to 65kp every 6 seconds?

[01gpgt01]

sweet glad to see your finding them. copper rtv works well on the egr if thats leaking

[02grandprix]

Ok got all my vac lines squared, also found one of the tees had a hairline crack in it. vac is at 19 and at decel it goes to about 25. But now i have a new problem. The oil cap on the front valve cover whistles really loud after about 5 mins of running. When removing there is a lot of vacuum and the noise goes away. I put the oil cap back on and the whistling sound comes back. Do you guys Have any idea what might be wrong.