Got a 2002 f150 5.4 it’s got 2 codes p0443 and p1451. Replaced the purge valve solenoid and still acting up. Truck runs and drives great just having a problem getting it started. I can’t seem to figure it out. Sometimes it takes couple mins to get it started and sometimes it takes a long time to get it started. Fuel pump is good new fuel filter new purge valve getting fuel at the rail I’m 100% lost and need help

 

How many miles do you have on the truck?

 

178,000 miles

 

Read these if you haven't already.
https://www.obd-codes.com/p1451-ford
https://www.obd-codes.com/p0443

 

When it doesn't want to start, try pressing the gas down slightly - if it still doesn't start, try flooring it. If it starts with it pressed down slightly, the IAC is sticking. If it starts with it floored, you probably have leaky injectors.

 

What is the actual fuel pressure when trying to start it?

 

It is unlikely that either fault code has anything to do with the difficult engine starting issue. Approach them separately.