Oil pressure sender problem

[Funpilote]

Hi everybody,
After a complet engine rebuilt due to piston problem, i am in conscencius break in, and sometime in idle, the oil pressure gage down to zero and raise immediatly and look like a COMPASS ! Due to 400 miles since rebuilt, i don't think real oil pressure problem, but a bad sender. I'have seen ford sender is (4G7Z-9D290-AB) but it's difficult to import in France, i buy very often spare parts from Rockauto, but they only supply aftermarket parts like Standard motor parts or others exotic chineses parts. Question : is Ford originals parts are made in USA, or they supply under her references parts from asia countries like lot of cars manufacturers ?
Sorry for orthograph !

 

[GT101]

We have the Motorcraft 4G7Z-9D290-Ab in stock in the UK (can easily ship to France) - this part is made in Mexico.

 

[QuickSilverShelby]

It may or may not be the sender. I had the same problem for awhile and it turned out to be and old, weak battery that was cause of the problem. New battery and my problem went away.

QSS

 

[Funpilote]

Dave,
Great, can you give to me your Phone number please ? Thank you

 

[nota4re]

After a complet engine rebuilt due to piston problem

It would be interesting to learn how the heck that happened! When/if you have time....

 

[PeteK]

I also am very interested in what happened to your piston. Failures in these engines are very rare.