Thread: Remapping EU2 motors - a word of warning

Originally Posted by OffTrack

ADD2:

In the end I had to order the Metri-Pack 150 as I wasn't able to find a trustworthy source that didn't have a MOQ of 380 units.

I got mine from here:
Home » Shop » Connectors / Harnesses » Delphi / Packard » Connector Kits » GM Delphi / Packard - 4 way metripack 150.2 sealed male connector Kit for iac, black

Ended up being $18 by the time shipping and low order fees were added in.

These "pull to seat" connectors require passing the wire through the connector, adding the crimp connector, then pulling the connector back into the housing to seat.

Just got the plug in the mail. It is a correct fit to the sensor.

cheers
Paul

A quick report back from the front...

I've finished the install of the 4-wire AAP. The biggest PITA of retro fitting is adding it to the existing loom. I need up with the battery box out and most of the loom pulled back to the intake side and it was still a job and a half. I'd done this a few days ago and it took about 3 hours from beginning to end.

The final step of hooking up the plug and fitting the new lid was a doddle.

I can confirm that hooking up the 4-wire AAP clears out the last of the "ghost faults" relating to Coolant Temp Circuit. The EGR fault is still not showing up. Not sure this is a big issue however.

The gearbox fault is simply the result of the auto ECU losing communication with the engine ecu during reflashing and doesn't return after clearing faults on both engine and gearbox ecus.

NANOCOM - TD5ENG.APP - TD5 ENGINE fault file

(4,3) COOLANT TEMPERATURE CIRCUIT, (LOGGED HIGH).
---
(6,3) COOLANT TEMPERATURE CIRCUIT, (CURRENT).
---
(24,7) PROBLEMS DETECTED WITH AUTO GEARBOX, (CURRENT).
---


cheers
Paul

Can I ask a question, I was thinking about this the other day.

Does this mean that you could take a MSB ecu, unsolder the chip, re-solder a flashable chip and "make" a NNN ecu?

Cheers,
Nova

Originally Posted by Nova

Does this mean that you could take a MSB ecu, unsolder the chip, re-solder a flashable chip and "make" a NNN ecu?

No you cannot. MSB type ECUs are not suited to handle the map read / write process.

Rather than re-soldering a new chip just solder a socket, then you can pull the chip out anytime you want and "reflash" it using an EPROM programmer (e.g. Willem). Alternatively you could have multiple chips with different maps each.

Originally Posted by mturri

No you cannot. MSB type ECUs are not suited to handle the map read / write process.

Rather than re-soldering a new chip just solder a socket, then you can pull the chip out anytime you want and "reflash" it using an EPROM programmer (e.g. Willem). Alternatively you could have multiple chips with different maps each.

Something like this:

In theory you can do it. One of the SAAB Trionic ecu's is similar to the msb. A couple of individuals have developed software mods which allow the ecu to be reflashed using obd port. It would require changes to the ecu firmware and specially written software to perform the flash upload.

There has been 6-7 years work done by the Saab tuning community to get to the stage where this is possible. In comparison the Td5 only really has one tool that is remotely comparable - td5 map editor. Google "t7 tuning suite" if you want to see the kind of tools that have been developed as a community effort!

No problems, just thought if the chip was the only restriction to re-flashing then soldering on another chip would be easy. Should have thought if it was that easy it would have been done already.

Cheers,
Nova

Originally Posted by OffTrack

Having taking the D2 for a quick trip down to the shops it seems my map copy has created other problems. The D2 is chugging/huffing on the over-run so something is not right.

I have since discovered the chugging/huffing is normal for the EU3 motors, and is nothing to worry about. Td5 Auto's with the EU3 motor exhibit this behaviour - it is something like the revs hunting slightly on overrun.

I still find it a bit disconcerting, but I'm getting used to it