1.fitted after market oil presure sender above oil filter

2. rooted signal wire from it into the swoosh gauge

3 wired 12v and igniton wire into it via stereo

4 earthed it to same earth poing as stereo

 

start engine when cold it read 40psi (unusual)

after warm up it reads max pressure what is 100psi (unusual)

when i come on boost it goes from 100psi down to 40-60 psi. now can someone please tell me what the hell is going on here

i have the excact same problem , bud ive got new oil pressure sender on its way , just to test ,when your igniton comes on ie without starting car does it read 100 then , ?? if so same as mine its the sender , i got new one on its way from my supplier

the sender is newthough

so is mine bud , brand new within first day it fooked up