PLX SM-AFR Serial upgrade

[vxleather]

Smart ars Jezz

[JezzaB]

Nice work Jez.. Any photos of the Guts.

I could of used some heat shrink tubing etc etc and gone all out but I used some hot glue to support everything and make it a bit more durable for being bashed around in the car etc. And its Sunday and there is beer to be drunk





Jez

[SS2win]

Are the two components on the secondary card factory or did you add them?

[mr.prick]

have you notified the manufacturer of this?
they should know that some people would like this option
without having to do the mod themselves.

[JezzaB]

Are the two components on the secondary card factory or did you add them?

they are factory, I just moved them back by adding leads to them so I could make room to fit the DB9 plug in.

When I first did it I posted on the PLX forum and they laughed. Oh well

Jez

[CV8IIM6]

I finally got around to having a go at it myself.






Very happy with the way it turned out but when i tested it in pass through mode (not even going to attempt BBL at this stage) i noticed some AFR spikes down to AFR 10 and up to 17.5.





I found a thread on a similar problem during BBL but not sure if anyone really got to the bottom of it. I'll check all my connections and try to get another log this week.

Any help would be appreciated.

Cheers.

[joecar]

CV8MII6, good job...

[JezzaB]

Top job mate! Looks great and once youve gone serial you will never go back!

Well done

Jez

[vxleather]

I finally got around to having a go at it myself.






Very happy with the way it turned out but when i tested it in pass through mode (not even going to attempt BBL at this stage) i noticed some AFR spikes down to AFR 10 and up to 17.5.





I found a thread on a similar problem during BBL but not sure if anyone really got to the bottom of it. I'll check all my connections and try to get another log this week.

Any help would be appreciated.

Cheers.

Make sure you are using the latest upgrades... some of the pre versions had a issue with the time it takes to read... eg 40msec to 10ms...

[CV8IIM6]

I've had a bit more time to look properly at the log with the voltage spikes in it and to play around with my DM-100.

Firstly in the log i can see regular spikes (21 in a 12 minute log) to AFR's of 12.5 17.5 and 10 which just isn't plausible.

I decided to set up the DM-100 to display a warning when ever measured AFR is less than 10.1 I then went driving with the V2 not even connected. It was disappointing to see the warning displayed on a reasonably regular basis confirming an issue with the PLX SM-AFR not the V2 or software.

So I'm wondering if i have a poor earth, if the unit was faulty, if my modifications have damaged a component, if my converter chip is faulty etc.etc.

I'll run a new earth, check my connections inside the unit and have a look at the analog output to start with.

expensive experiment at this stage.