Help ! Engine Stops

[AJUK77]

hi i been away went france had a gud tyme,

I need advice my lexus is200 drives fine but sometimes wen start the car it throttles a bit and dies out but theres no warning lights or anything showing i was told to use redex engine injector???

What u guys think should i use redex fuel injector ?? anyone used it before ?

also i use sainsbury tesco and asda for petrol as shell n bp r bit far.like i said it drives perfect and no warning etc on dashboard or odo its started n stolpd 3times in 4weeks it shakes a bit then stops soon as i start engine nvr xperiencd it before.

[AJUK77]

SOLVED metal keyring i put on master key was causing it to misfire strange but tru and also radiator and overflow were dry as a stone filled them up and works all gud now :)