I am using Moates' BURN1, GP1 and TunerPro to make changes to my $8D mask, or at least I think I am

It seems that no matter what I change, when using my Auto-X-Ray scanner, I get the same readings.

Examples:
1. Engine Idle Speed vs. RPM - changed it to 650 across the board from 68*C and up. Yet, no matter what, it indicates desired idle speed as 600.

2. Spark Advance Max. - I set it to 32*, yet when crusing, it regularly breaks 32* and will hit 36*+.

3. VSS - I finally got my VSS to work using a Dakota Digital interface box. It is set to output 4000 ppm and this is what I had the chip set to. At 20 mph it reads 31 mph on the scanner. So I try messing with the VSS settings, 8000 and 2000. In both cases, the same 31 mph at 20.

4. Timing and spark knock - It seems that I consistently get 4*-6* knock retard whenever driving and giving it gas. Short of idle and coasting, I get knock retard. So over a weeks period of time, I take out 4*, then it still shows the same knock retard, so I take out another 4* - and it still shows the same amount of knock retard.

5. VE tables - I can go up or down 20% and nothing changes, same BLM readings.

Shouldn't the changes I have cited above show on my scanner. I am certain that I save the bin with each round of changes and erase the chip before loading the new file and saving to the chip. I have tried reading the chip and saving as another file to verify what is on the chip. It always shows the last round of changes

This is really frustating for it feels like nothing I do is changing the drivability of the TPI.

Any guidence on what I may not be doing correctly would be appreciated. Is there any change I can make that would be a good "test". Thanks, Ed.

 

What sized chip are you using? It almost sounds like your burning to the wrong half of a chip that should be left unused.

 

I am using the 27SF512 chips that came with the GP1 adapter. Now I see at Moates' website where the description reads

"Works fine with 1227165, 1227730, and other similar ECMs. If your car normally takes a 27C128, 27C256, or 27C512, these should work for you. Just adjust the 'Start of Device' value when programming. (For 27C128 original, set to C000 hex. For 27C256 original, set to 8000 hex.)

Sounds like you are on to something here. For using the AUJP type bin in a 727 ECM, what would be the "original" start address to use, or should I ask what type of original chip?

When using Moates' PROM Read/Write Utility, then I should adjust the start address in Hex for both "Chip Addressing" and "Buffer Addressing", would that be correct?

I have noticed that the AUJP bin I downloaded from Moates' website is 32kb in size. But when I read the stock Street & Performance memcal and saved it to my hard drive, it is 64kb. Is this creating a problem and if so, how do I read and save my original S&P memcal to save as only 32kb.

Thank you for your help with this so far, it appears this is my problem. Ed

 

If your stock bin is 32kBytes then thats 256kbits. Try stacking the bin before you burn it to the chip so each half of the chip has a copy of the bin on it.

 

Saw the description you quoted above. You need to make sure your offsetting your bin so it burns to the last half of the flashrom or you need to stack it.

 

Thank you so much! Since your second to last response, I have been doing some searches and this is starting to make sense to me now.

I just read my S&P memcal and specified a 27C256 (Read-Only) chip. It saved the new bin at 32kb on my hard drive.

Tomorrow I will try dropping my spark table a few degrees and either offset or stack the bin as you suggest. It appears due to my ignorance, my changes were not taking effect.

Your help is appreciated. Ed

 

Thank you again for your help.

I burned a new chip and started at 8000 hex before loading the file and programming the new bin. Well, it works perfectly now. My idle RPM is what I defined, and my spark knock count is cut by probably 80+%.

It's just a shame I spent the last two+ weeks (since I started DIY) changing absolutely nothing.

How was it that my MEMCAL was bypassed by Moates' GP1 adapter, yet the system was still operating like stock?

Ed

 

Honestly, I don' t know.. I am suprised your car even ran actually.

 

That tuners bin you used was probably two bins stacked on top of eachother if it was 64K. One of the bins was used by the ecm while the other one was being tweaked by you.