I just recently put a engine and transmission in my truck and got it on the road. When driving it pulls away good when you first start driving it, after it warms up a bit it won’t accelerate properly. It bogs out when you give it more gas. Just wondering if anybody had problems like this before. Any input would be greatly appreciated

 

Check for codes. the computer will store codes even if no check engine light is on. Until then it is a crap shoot as to where to start.

what year truck? what size engine? what transmission? are they the same type engine and transmission that originally came with the truck? is the engine and transmission the same years or within the same swap range as original?

All that information is pertinent.

 

I’ll add...What wiring harness did you use?

 

These are the codes I got. It’s a 1992 F-150 with a 302 from a 1990 Bronco with a E4OD transmission

 

Now you have a reference point to start from and correct those issues and see if it changes how it operates.

172 can be caused by a faulty oxygen sensor but also vacuum leaks either in hoses or gaskets can cause it. If you are depending on the nylon hoses, they are probably shot and cracking or broke. Rubber vacuum line can be bought that will slip over the nylon tubes and the vacuum tree. replace one line at a time from beginning to end, that way you don't miss one.. The IAC gasket has a habit of going bad and causing leaks. New one is about 2 bucks and the throttle body intake gasket is about the same ( where your intake hose from the air filter goes). while you have the IAC off, spray it out and clean it with carb cleaner, look at your butterfly plates and see if they are gunked up.
Correct that first then scan again. that may be causing the 332

 

Yeah I'm going to check all the vacuum lines and gaskets and clean everything up and give that a try before buying a new egr valve

 

these two might help, both have pics
Replace Plastic Vacuum Hoses with Rubber - Ford Bronco Forum
How to Clean and Test your IAC - Ford Bronco Forum