Hello all, I need help, this is the first modular motor I've ever worked with and its leaving me stumped. Here's my situation, I have a 97 f150 swb stepside-had a 4.6 with 4r70w, both were bad, bought another 97 f150 extended cab short bed with 5.4 and e4od trans, both ran great, pulled the engine, trans, both wiring harnesses and computer to drop in the stepside, got it in and everything hooked up and it will turn over fine but no spark and no fuel. Can someone tell me what I'm missing? Any help would be greatly appreciated!

 

I don't know but it sounds like it's related to the computer if there is no spark and no fuel.

 

well, if it is the computer, I don't understand how it would be affected, I may be wrong but the only difference i can think if from truck to truck is the under-dash wiring harness that connects gauges, etc

 

How would I be able to check if the computer is still good? Again it ran great before pulling it out.

 

Does the 97 have the PATS system? I would say it's time to get a wiring diagram and do some troubleshooting. Do you know a diagnostic skilled mechanic who could come by and help? Have you scanned it for codes?

 

I unfortunately don't know any mechanics like that, and I don't believe that it has the pats system, didn't 97 not have that? Also no chip in the key so I don't believe so. And it would be much appreciated if you could point me in the direction of some good diagrams. Also I have a code reader, I hooked it up to the truck and it says it can't communicate with the computer, I hooked it to another truck to see if the scanner was working and yes, it read the other truck fine.

 

1999 was first year of PATS.

Check the cigarette lighter fuse, that also protects the OBD port.

Swap instrument clusters with the donor vehicle, they are programmed to VIN.

 

I'll check the fuse after work, and whats the remedy for not having the instrument cluster from the donor vehicle because it wasn't in the donor truck when purchased. Will no having the correct cluster keep it from having fuel and spark? So far when I turn the key on the only thing that reads odd is the temp gauge, it reads HOT, as in pegged out. I installed a new temp sensor when I swapped it over as well as a new cam sensor.

 

If you don't have the donor cluster you will have to reprogram yours. Ford dealer or shop that has the equipment. Yes, a misprogrammed cluster will inhibit fuel and spark.

EDIT: The cluster is "married" to the VIN that's in the computer. Your cluster sees a different VIN so it shuts everything down. My grandson had to replace the cluster in his 98 and it had to be reprogrammed.

 

All the fuses are good, pulled each and visually checked them. I appreciate all the help. Gonna see what I can find out and will definitely post any results on here for future reference.

 

One other thing to check could be the fuel cut off switch in the passenger kick panel. It’s responsible for cutting the fuel pump power in the event of an accident. I tripped this thing once when replacing the heater core and it took me a while to track down why the engine wouldn’t start.

 

Maybe pats

 

No PATS in 1997.

 

you can’t just swap ECM’s, they have to match the VIN and Dash / steering column

 

Get Your 4R70W rebuilt or find a good used one from a 97-98. Reinstall your 4.6 computer and wire harnesses. Your 97 doesn't have pats but the 5.4 PCM is looking for it. The other option is to find a 1999+ dash and install that. That is a PITA and you will need a dealer to reflash it to the 5.4 PCM.