I had a water leak where the crossover pipe is so I went to change the gaskets and found out my gaskets failed due to the intake Manifold being cracked I replaced the manifold and put new gaskets and all manifold gaskets, crossover gaskets, etc. when I crank it it will run for a little while bout 1-3 minutes then start sounding like it’s cammed out which isn’t normal for a STOCK 5.4 2valve then it slowly dies as idle jumps I canbonky assume vacuum lines but I’m honestly lost

 

We are lost too if you don't identify what you are working on with a few more details. Need to know a bit more than it's a stock 5.4 2 valve. Year? Aluminum or plastic intake? OEM or aftermarket replacement?

 

Sorry bout lack of info 2002 F150 Super crew cab FX4 5.4 2 valve plastic intake OEM I believe got at oReilly’s

 

you didn't buy an OEM intake at o'Rielly's...you may have bought a DORMAN. FYI you MUST use DORMAN gaskets on a DORMAN intake. The ONLY gaskets that work with the oem FORD intake are....FORD.

 

Ok then it’s a Dorman it came with gaskets and hardaware around 187$ from oreillys