Voltage drop

Turns out it was a bad fuel pump. Battery is in trunk so easy to make short jumper leads. Just out of curiosity I put it straight to battery. It still only had 11v at pump. Did same with my other pump. It had 12.2v. Got a uro fuel pump from Autozone. Basically a Bosch 044 replacement. No more crazy voltage drop. Thank you for all the input gentlemen.