I had this same problem, My tuner scanned it and turned out to be the crash sensor in the front bar had a bad earth, bit rusty between the sensor and body. Bit of sandpaper to fix, all good now
Just drove to the Gold Coast and back Best I could get was 9.5L/100km, and that was giving it a bit on the occasion It is more economical than stock which was (10.5L/100km)
Did this mod yesterday Best $20 I've ever spent Considering Autobarn wanted $200 for a box to suit ( they can stick that ) I can really feel the bass now, a big improvement Top sh*t exahsix
I have Pedders adjustable coil-overs on the front and lowered springs on rear. Have no problem at all with them, feels great on the road Perfect ride height