1991 Mazda 929 Q&A

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

It has a new battery new alternator when going up a inclin the car loses power. The battery,starter,alternator was tasted and fine -
Answer 1
charge and load test battery and recheck charging system -
Comment 1
I gotta ask, who tasted the battery starter and alternator and said it was fine? -
Comment 2
Napa and all those parts are new I can't understand why the car loses power going up a incline either -