First off many thanks to Dasing (forum member) and Cameron (Racepak) for showing that the Datalink II software is actually useful!

Apologies for the 'big' images, however needed to display the data...

At a recent track day at Lakeside (Queensland, Australia) the car ran in four sessions. However by session 3 the car would not accelerate as it previously was and by session 4 it actually felt like the car was having a soft cut. The dash (IQ3) was giving no warnings (oil/water temp, oil pressure, low fuel, high/low EGT). Fuel surge has never been an issue in the car as it has been run in the past down to below 1ltr, during all the 4 sessions fuel level was never below 10.

FP by Eipeip, on Flickr

It took me a while to look at the fuel pressure trace as the source of the problem, so I took the opportunity to add to my 'Car Health' tab. This showed that he fuel pressure issue was not related to G forces nor fuel level or below 5,750 RPM. EGT 1 above 5,750 showed that when compared to the average EGT it was up to 30°c hotter than the other 4, however in general No1 has always been a little warmer than the other 3. Interestingly the shape of each EGT is almost identical.

Car Health by Eipeip, on Flickr

  1. Swap out fuel pump for new one - done. The current one is a bout 3 years old
    DSCN4023 by Eipeip, on Flickr[/*:m:1bl6wbdz]
  2. Change fuel filter - done. Current one was about 18 months old[/*:m:1bl6wbdz]
  3. Clean injectors - having done this week
    DSCN4052 by Eipeip, on Flickr

    DSCN4051 by Eipeip, on Flickr[/*:m:1bl6wbdz]
  4. Add low fuel pressure warning to dash & ECU - not done, will do after injectors cleaned[/*:m:1bl6wbdz]

Whilst the Datalink II could make customising graphs/reports less time consuming, it does allow data analysis. It would be great to have 3 way data/scatter plots but I'm getting used to it (with the help of Dasing).