Hi all,
I have an Audi Q7 4.2 tdi v8 in the workshop at the moment that has a slow start when cold and even slower start when hot, When cranking it drops mmi screen out and flashes and struggles badly if not glowed for 5 secs.
The car has had 2 new batteries in the last 6 months (one new one by us just now).
I took a battery test with the bad car and had a similar Q74.2 tdi in the workshop that I took a reference test off that was starting perfect. i'll put up both waveforms.
I haven't used this software before and need a little guidance.
They are both very similar, one at 11.9 and one at 11.8, one starts perfect, one doesn't.
On the bad starting car I noticed the max current was a lot lower. ?????