so i have been siting in my truck trying to get it to run right again for the last 4 hours. i uploaded a bin file into the ostrich 2.0 which i have installed properly, and then i selected up the proper xdf file and the truck ran great. but when i tried to change something it said update failed, i was just playing with things like fuel cutoff, or desired idle rpm, just to play around with it, this was my first time messing with anything. i really dont remeber how, but i got it to work, and it lowered my fuel cutoff to something ridiculous like 1200rpms or something like that, it updated, the motor died and when i went to start it back up nothing is hapening, it runs(like crap) but i get no readings from anything when i datalog. so i go and change it back to how it was, and update it, still same problem. so i delete the bin file, and download the bin file again, and then upload it into the emulator again, nothing changes. i dont have a clue what to do, my brain is so fried from thinking about it all, i cant really think of what to do first, my brain is so fried im having trouble remembering what i even did.

 

so i went ahead and took the ecm out again, and put the chip back in without the adapter/emulator setup and it ran fine again. put the adapter and emulator on and same crap...

 

7747 ECM, correct?

If so, do you have the Socket Booster installed?

I had similar problems when I first started messing with a 7747.

A couple things to check, that the "checksum is disable at upload" is checked in the tools>ALDL/Emulation tab, and that you actually have emulation turned on. Click the icon that looks like an EPROM in the toolbar.

 

no, i have the 7427 ecm. i have the truck running now, i cleared everything all out and uploaded the proper bin to my emulator and it ran, untill about 2 seconds ago, i went to number of cylinders and changed it to 10, of courseit dies, i go to change it back to 8 and now its acting the way it was earlier. it let me play wiht things like initial timing advance in real time and it worked fine. i dont understand what im doing wrong.
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also, everytime it starts acting up like this, it will not recognize my data log cable no matter what i do, untill i disconnect the emulator.

 

Sounds like your ECM is reverting to Limp Home mode.

There should be no reason to adjust the cylinder count anyway.

I believe the 427 uses a MEMCAL alot like the 7730, in which case had a 28 pin chip and doesn't require the socket booster.

 

Don't play with the cylinder count parameter. It is used in the spark timing calculations.

Make sure that you have the MaskID set to $AA for emulating. This bypasses the checksum test.

At this time I would put the PROM back in and get away from it for at least a day (two days may be better). Then come back to it.

RBob.

 

i was messing with the number of cylinders becasue it was an easy adjustment and would definitly show that it my adjustments are going through.

i changed the mask to what you said, ill see if it makes it any beter.

 

driving it on the stock bin file sucks! i cant touch the boost or itl go lean and it just feels gutless, i used to be able to roast the tires with very little throttle, now it just refuses. im getting familiar with the program and how to use it now, but i dont really know how to deal with the VE tables properly, i need to read more about it.