HELP with 91 VN s2 starting

[paulbenning]

Can body Help

We have a VN S2 V^ commodore with a starting problem

The problem is that it is hard to start, when it is started the revs go up and down and it always stalls every time it is put back in to Park .it winds over for about 5 Min before it starts longer when the engine is warm. We have replaced

oxygen sensor, Map sensor, Crank Angle Sensor,The Knock Sensor ,the coolant temp Sensor and computer but still having trouble starting can any body help with the problem.

[juice1929]

maybe the idle air control needs a clean? or try holding the revs on 1500 when in park and see if it stalls, could be that the throttle cable needs to be tightend or changed??

[hi_ryder]

inspect and clean your throttle body, something simple and easy to cross off a list of things it might be...

[delcowizzid]

if it needs cranking for ages it could be the fuel pump relay or fuse does it prime before starting if not you have to crank untill you get oil pressure then the oil pressure switch turns on the pump and they start