Q: cranks over slow sometimes wont start ticking in motor will start with a jump on 1991 Mazda 929

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
It has a new battery new alternator when going up a inclin the car loses power. The battery,starter,alternator was tasted and fine
(1) Answer
(2) Comments
Napa and all those parts are new
I can't understand why the car loses power going up a incline either