Join Date: Nov 2007
Location: Lutterworth, UK
Re: Slow cranking on 05 GT JTS
Either your battery is on the way out, or it is not being recharged by the alternator properly, or maybe a wire connection to the starter is becoming contaminated with dirt/grease/oil.
If your battery were really on the way out, surely you would get all the daft electronic problems and messages.
Check the alternator and the feed to the battery and the starter first.
My 145 had a battery that lasted 8 years, but then I did very little short distance type driving.