Hit a couple of potholes last week in my van the steering started pulling to one side I've had the wheel alignment done twice now and it's still doing it what you thinks been damaged it's a 2008 fiat scudo

 

im gonna guess its an escort van and its the bottom arm bushes

 

Escort van, depending on age, as above bushes, but if a mk3/4 for example track control arms, they are made of plastiscine!!
tabetha

 

It's a 2008 fiat scudo

 

anyone

 

Anyone know

 

Sounds like something is bent, even though the tracking is perfect, if one wheel is slightly further back, ie the hit one this will cause what you have.
Get a helper and with a tape measure measure between the wheels each side of the van, from centre of the wheel, they should be within around 1/4" from side to side.
tabetha

 

You need it 4 wheel aligned

 

I've replaced the two lower suspension arms and it's still pulling to one side would I need to do wheel alignment again

 

ideally yes