I also posted this thread in the tuner section but I figure there is more traffic here and I am hoping for an answer since this is Sunday and can't contact the tuner or SCT untill tomorrow.

i bought a SCT handheld tuner with custom tunes for my 1998 4.6 swapped to a 2004 5.4. Retained the 1998 ECM, tuner has all the details about the swap.
Try to program the ECM and get the Unlock ECM Failed error 1019. Contacted the tuner several times, did some trouble shooting and he had me talk to SCT tech. Spoke to 3 different techs, first remotely reformatted the device, second had me check for 18 volts during attempted programming on pin 13 which I had, 3rd tech loaded an older version of firmware none helped so they gave me a RMA number to return the device to check it.
Well today Not confident the device was bad I decided to remove the ECM to take a look at it before I sent back the SCT tomorrow. ECM looked stock and unmolested, I looked under the plate on the back and there was a chip, it says Hyperchip.inc. FL1C28. 10/26/98 I'm guessing this is my problem, what is the fix? New ECM? New stock chip?
I have an email out to the programmer but it is Sunday and wonder what you guys think.
Mike

 

S. O. P. You normally can't stack one program change on top of another unless you know what the first change is making and know what your doing with a custom programmer's package and hardware to do it.
Sounds like neither you or SCT knew the chip was there.
The SCT program can tell if the PCM program is stock by several means such as a 'check sum'.
If it sees anything different it won't act because it does not know what is there.
If it were to pile in a load, the PCM would not work anyway.
This is also a means that prevents you from using the tuner on another truck until the last upload is backed out restoring the program to a null point.
After a load, the device keeps track of history and will not allow a second up load to another PCM.
None of it is a real mistery.
Good luck.

 

Thanks, removed the chip and all is well. Had the truck for 8 years and never knew it was there.
Mike

 

Good you got out of the problem that easy.
Good luck.

 

Wait, so you did a 5.4L swap and were running it (unknowingly) on the 98 ecm with a chip? Wouldnt think the new 5.4 would run very well like that.

 

The 5.4 ran great on the 4.6 computer with the Hyperchip, ran way better than the 4.6 did. The 4.6 pinged like crazy under load not so with the bigger engine it just pulled like a bear. I might not have even gotten the SCT with custom tunes but I was afraid the computer would get out of range pulling a trailer at high altitude or something. I can't find any info about the Hyperchip #480551, I'm curious just what it was supposed to do.
Mike