Holley Pro-Jection 4Di help needed

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Apr 29, 2011 | 07:15 PM

84Fordvan

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Holley Pro-Jection 4Di help needed

Just picked up a Pro-Jection MPI (same as 4Di) ECU/harness off eBay the other day, and I seem to be having problems with sending the map to the ECU. When I try to send it, it goes through the writing process fine, but then says "Data send failed to verify". If I reset the base map and not tweak any parameters, it will say "Data sent correctly" when I send the map to the ECU. I am just bench testing this right now, so could this possibly be a voltage level problem? I used a car battery for power (was at 12.6v when I sent the map). I didn't use a battery charger though. I had a distributor hooked up to this and if I spun it with a drill everything seemed to work (injectors fired, IAC moved, etc.). I do know that the ECU is good, so I guess I'm just trying to figure out why I have data sending problems. I didn't want to call Holley and end up not getting an answer. Any help I could get would be appreciated.

Apr 29, 2011 | 08:25 PM

LxMan1

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A bad MAP perhaps? I would think that 12.6V should be plenty to bench test.

May 1, 2011 | 12:52 AM

84Fordvan

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Could be a possibility, but the maps I'm attempting to use came with it on a floppy disk and I've also tried maps that came with the program. A little more info, I'm using version 3.38 software to tune this with an older Dell laptop with a serial port. Maybe the speed is wrong on the serial port? But then it wouldn't work at all one would think...

May 1, 2011 | 08:47 PM

LxMan1

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I wish I had more input, but I am unfamiliar with that system. I would think that the baud speed would be ok if other inputs can be entered. The only other thing I can think of is maybe the data on the disc is corrupt.

May 2, 2011 | 10:01 AM

84Fordvan

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Thanks for your help! I'll have to see if I can find some new software and base maps and see if that helps

Apr 6, 2012 | 03:02 AM

84Fordvan

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Anyone know where I can find some old Holley 4Di v3.35 or v3.36 software that I can download free? Just purchased a "new" E-PROM chip for my ecu, they sent me a v3.31 which only works with software v3.35 and v3.36. I have the only version I can find which just happens to be v3.38, making it too new for the chip. Maybe I'll have to look into using a different EFI controller, possibly one of my Ford EEC-V mass air computers. Thanks in advance!