4iiii - non-stop reading dropouts

[mecheng89]

Good evening, techie Hubbers.

I've been riding with a 4iiii left-side Precision 3 PM now for 2 years. Recently, I've been suffering from non-stop power reading drop-outs.

Has anyone suffered from the same? Some Googling reveals that this is a common problem with this product and Garmin head units.

I've made contact with 4iiii for assistance.

[Ncayi]

I had the same issue a few months ago. After searching the internet I managed to sort out the issue. The root course for your issue might be different from the one I had but this is how I resolved mine.

The prongs circled in the centre (only the ones in the centre) needed to be lifted up just slightly. Over years of use they became flush which affected contact with the battery. I also noticed that the dropouts became worse when riding on poor road surfaces 

I also have a make shift shim between the battery and the cover yo prevent any play and that sorted out the propblem for me.

 

Edited Saturday at 05:36 PM by Ncayi

[Jbr]

Thanks I'll have a look. I started training more on my road bike recently, but got very frustrated as I kept having 1 to 5 secs drops which affected my average lap power a lot resulting in sometimes over doing some of the reps and then being toast before the end of my workouts... Been training on the gravel bike to finish the holiday block because of that, as the Quarq I've got on there never EVER drops.

[Frosty]

22 hours ago, Ncayi said:

The prongs circled in the centre (only the ones in the centre) needed to be lifted up just slightly

Slightly means exactly that… minimal force; I used too much force and they broke off. The unit was so old (2017) that 4iiii said it’s no longer serviceable, with an error 20 code (I think it was). I could never calibrate it.