...the ECM Hanger's Club
ecm-hanging-under-dash.jpg
UPS dropped-off a box of Moates gear just before lunch, so I took that opportunity to swapout the original (or maybe not?) ECM with the ZIF'd one that Moates soldered-up for me. The 1227747 that I pulled has the ANLX chip in it - which doesn't seem to equate to this California 5.7L 4x4 3.73 gear 1/2 ton Suburban, so maybe it's been previously swapped. That being said, other than a rough idle (no other explanation - everything was gone though), ANLX got me 13.5 MPG on the highway. Not bad for a lifted Suburban, IMO.
I hooked the Burn2 programmer up to my laptop and loaded an ASDU bin (actually the ASDX3 file from Post# 9) and...the Suburban would only run in limp-home mode - wth? Okay, some more digging around and I discovered that the 27SF512 has to be spaced-back two rows from the handle-end of the Burn2. Erase, reprogram - success! The engine purs like a kitten - I think my rough idle is gone. I am getting a couple of air pump flags (no air pump on this vehicle), so I need to turn those off - but solid 128 BLMs at idle (a bit rich, though - O2 is a solid 0.6xx).
I might take Friday off just so I can go datalog this thing and start tweaking my VE tables. I can see this new hobby is going to be a bit addictive
One question - ASDU seemed (seat of the pants - though I could go over some old logs) to take forever to go closed-loop, well north of 180 degrees. Is that normal for this BIN?
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