my car has trouble starting and i figured the first thing to look into is fuel. i borrowed a gauge but cant figure out where to plug this thing in?

 

Since you are new, I wont bash on yah.

Here's a guide on diagnosing fuel problems.

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/how-troubleshoot-your-fuel-system-871361/

As a future reference, please do search before posting. Forum members here don't like people just asking directions and not trying before hand.

You can also go here for HOW-TO guides: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/

Good luck!

-AzEKnightz