installed an extra fuel check valve in the tank just after the pump..
still no joy.. it starts after 5th-6th crank
Bummer!! may be a bit of useless info here though, on the older gm stragiht sixes, this was often caused by the fuel pump relay getting tired, dont know if they are expensive there or not Cem but it may be worth a try?
changed list..
brand new gm fuel pump 230 £ ouch..(it hurts and thats not the list price)
new crank sensor 60 £
fuel relay-main relay (twin purples) 25 £
fuel regulator 20 £
injector cleaning and pressure tests 40 £
check valve .. (free)
and now this
dont know the name for it , price 25£ approx..
now a bit better starts at the 4 th crank when cold..will see when hot today.. :-/
sparks all new..(ngk 4 electrode)
sparks checked .. its ok..
interestingly if I pull icv hose and maf socket it starts immediately..
and once started it pulls like a train.. yesterday even at 80 kms/hr (traction control on-2 gear ) rear was hardly controllable..