2002 F150 w/5.4L

I had a guy replace my bad 4.6 with a good 5.4 and now my truck won't start without using a remote starter connected to the solenoid. It will not start with the key. The original harness and PCM are still in use. Could the key lose its programming?
Anyone have any thoughts to the issue?

 

Keys never loose programming since they aren't programmed. It's the PCM that is programmed to the individual codes that are manufactured within each key.

Check the F2.21 circuit.

 

What do I check about this circuit? Is it a fuse? Relay? I need a little guidance.

 

Is the 'THEFT' light flashing rapidly?

 

How does it run once you start it with the remote starter?

 

No it's not! That should tell me that its not the PATS, right? It cranks and cranks but won't fire.

 

It sound fine but it hasn't really been driven yet. I had to take the truck back last night from the mechanic because he's had it for 2 months and has gotten nowhere with it and wants more and more money. Now I'm on my own and need help.

How can it start with a remote starter and not with the key? I don't think its the PATS because the THEFT light doesn't blink rapidly when the key is turned and cranking the engine.

 

Is the check engine light on?

 

what was wrong with the 4.6? just wandering.

 

Check engine is NOT on.

 

I lost compression in the same cylinders for the second time in two years so I wanted the larger engine so I didn't put so much strain on it. Burnt valves!!

 

If it starts and runs using the remote starter connected to the solenoid it is not a PATS issue. The problem has to be in the starter circuit , but not the solenoid as it is already working as you describe. Places to look would be between the battery and the solenoid.
Which include the ignition switch , neutral safety switch and any wiring between . But the most likely problem is some wiring left disconnected or loose from the engine swap . I assume the starter worked before the swap.

 

Everything worked prior to taking it to the mechanic. I have to just make sure it starts and take it for a test drive.

 

try moving the shifter around while holding the key in the start position just KEEP YOUR FOOT ON THE BRAKE your neutral saftey switch could be out of alignment

 

What kind of remote start system do you have installed in your truck? It's possible that the programing of the remote start is not letting you use the key, just the remote start. There are 2 different banks of programming with Ford Accessories remote starts. Kinda like the DIC display it lets you programm personal preferances.