Hi my beloved remapped 04 vrs has started to be dodgy starting at the mo. Engine cranks over but when let go of key engine just dies again. If you pump the accelerator when cranking over it leaps into action and holds the revs. Plugged it into diagnosis machine and came up with crankshaft sensor. Got a new sensor to go in. Any advice on fitting it as it looks fiddly and any experience with this problem as I'm worried changing this sensor won't cure the starting issue.

Thanks matt.

Please anyone. Any light to shed on this issue