i have a vdo oil pressure gauge and when i put it in it only stays at 20psi what would the problem be and the one in the car works so i don't think it would the sender

 

Your VDO is connected to a VDO sender unit. Right??? If going to the original factory sender unit, I wouldn't be surprised that it read wrong. I be confused. As in , I am confused.

 

it is connected to the original factory sender

 

Did the VDO gauge instructions say it was to work with the factory sending unit????????

 

Didn't it come with it's own sender?

 

i bought it from a friend but it was new and it did not come with instructions and they don't come with it's own
sender

 

thats why you dont buy VDO gauges. They dont come with anything.

No you are not suppose to use the stock sender with that, you are suppose to use the VDO sender.

Oh yeah, how did you get your stock gauge to worka fter you remove it

 

what do you mean by how is my stock gauge is going to work it works right now

 

bump

 

you unplugged the stock sending wire, plug in the VDO one, it still works?

 

i unplugged the stock one then i put the vdo then i put it back to the stock one because the vdo did not work

 

Just go and buy a VDO oil pressure sender. Take your gauge along so you get the right one.