Any help on whats needed? I have my truck in a one-man shop, putting a lower mile 03 into my 150k 97.
Motor in, swapped intake, no fire. Mechanic got seriously injured, and i need to figure this out.
Cursory search says ECU for the PI unit...is this all?
Mechanic suggested swapping crank/cam sensors...i dont want to start throwing more parts and money at guesses.
Anyone here performed this swap? I tried to search here and on web but didn't get any relevant hits.

Thanks in advance, need my truck back asap!!

 

You need to look at the piston crown shape and depth between the 02 and 97 motors of different displacements.
This is because the PI heads have a different combustion chamber shape.
What we do know is the PI heads from a 4.6 installed on an early non pi block 4.6 will result in an increase in compression to 10.1 to 1.
The reason is the piston crown depts. were changed between the motors to keep the 9.7 CR after the PI heads came into use.
If the same heads (PI) were used on a 5.4 expect the compression could go even higher. You have to look at total volumes of the piston crown and the head chambers.
Assuming there is no interference issue with valve action, you could run into spark knock on 87 octane gas.
This is the research that has to be done ahead of time or make a change of plans and parts.
I won't say it won't work but you have to know these differences.
Good luck.

 

I can't help with the nuance to this but if you look at the information from shops that repair PCM's you usually find this for the F150; 1997-98, 1999-2002, 2004-2008. Notice 2003 is not listed? From what I understand it has to do with mid-year changes effecting some trucks. The PCM part and calibration numbers are needed to know if it belongs to the 99-02 or 04-08 PCM's. I have no idea how this effects putting either one in a 97. If you gave one of the many PCM repair shops a call you could probably find out why the 10th generation F150 PCM's are broken down the way they are and how that effects your swap if at all. Did you get the PCM with your new engine? If not, can you still get it?

I don't understand what changing the intake is about? There's much more to swapping a non-PI engine to PI or vice-versa than just the intake. You have to use the right heads for the intake too among other things. There are several articles on the web about what you have to do.

EDIT: Did your new engine come from an F150?

 

Not swapping heads, fully intact engines.
I did due diligence before purchasing motor.

I pulled the cam drive chains, found passenger side upper phenolic guide completely gone-am suspecting jumped time on that bank.
Latest queries seem to indicate a NON-Pi ecm willl properly operate a Pi motor. Jumped time could cause a nofire state.
Heads coming off tomorrow to see if valves kissed pistons.

 

New, Pi engine was from f150, had no intake. My existing intake is a small oval port runner non-Pi, so we obtained a correct square port pi manifold for the square port pi heads on new motor.

Mech suggested i reuse my non-Pi heads on the pi-am not going that route. I suspect my "newer, supposedly lower mile motor" is in fact candidate for rebuild.
GRRR. See my response to Bluegrass above.