Quote:
Originally Posted by ischmitz
So Loren exchanged the unit because he couldn’t fix it? Is it only me feeling gaslit by the statement “the fault is in the processor” because the DME came from a dubious source?
The 8051 MCU can be swapped in 5 minutes if it really is root cause. Dave (aka Loren) makes that point in another DME thread. https://forums.pelicanparts.com/porsche-911-technical-forum/398595-calling-motronic-experts-ic-information-4.html#post12494177
The “upgrade” to the 28-pin chip conveniently runs all code from external memory to where any generic 8051 will do. So why not just swap in a new 8051?
He probably gave you a reworked 924 or 944 DME with non-911 compatible ROM code on the 8051 and kept your “core” to make it an early 911 DME for the next paying customer. The “reflow” nicely hides the other rework required…. |
Missed seeing this in the post (#270) by the OP?;
So you're unaware that the 924 DME ECM uses RCA chips & NOT an 8051!
Did you miss seeing what the "rebuilt" core (see OP's post 176) looks like?;
The replaced ECM has the later better fiberglass circuit boards, see the image in post #270.
Given that the OP had consumed so much time & effort with his "rebuilt" ECM, and to minimize any future problems, Systems Consulting just provided another better ECM.