EFI differences on the Magnum???

MonkeyMadness said
Is there any difference between the EFI on a 5.9 91-95 vs. the EFI on a 5.9 1999?

All i can this is that after 96 the ecu controlled the auto trans.
TPS, Dissy, Crank Trigger, injectors, alt, and oil pressure sensor. should all be the same? Right??

yes, just change the sensors that do not plug in to ones that do ;-). the early years up to 95? have EGR so you will need to plug that or swap your manifold that does. I would keep EGR if your going to use the ECU that has EGR already. (though i dont recall why exactly ;-) 99 or so they changed injectors to RED with oval connector might have been 21lb vs 19lb injectors iirc, but you can keep the ones you have. Use the injector size that your ECU wants.. Also early <93 where return and regulated PSI on the fuel rail with vacuum. Again, if you keep all your original truck sensors and wiring everything will work. I used ford 4 hole injectors from a crownvic for a direct swap and bit better MPG.

EDIT found my post on Ramchargercentral in 2005... iirc i used a 5.9 with the one piece harmonic balancer so it may have been a 1999 or 2000?

trojmn said
5.2 and 5.9 Mag motors are only different in the shortblock and computer. Heads, MPI, and intake are exactly the same. The throttle bodies use the same AIS, TPS, and MAP sensors for a number of years until they changed the connectors slightly. If it fits and plugs in then that's what you need. Same for fuel injectors. If your looking to by new or new to you ones look for Bosch style square connector, high impedence injectors 19-22lb/hr made by anybody. Fuel inj are all square connector bosch style deisgn II high impedence. 92-94 ish (yellow) Mag V8's (maybe v6 too) used 19lb injectors. They're yellow for quick ID. Google the PN. I currently am running Bosch design III style Ford Injectors.

All you need for your swap is a properly ballanced TQ or flexplate and computer. You don't even need a 5.9 computer right away. The 5.2 computer will run 5.9 decent in a pinch. Do yourself a favor and dont break the crank sensor off when you drop the new motor in! ;-)