Is the check engine light "ON" and if so have you had it diagnosed? Did you replace the fuel filter when you replaced the pump?
Data-driven reasoning takes the facts of the problem and applies the rules or legal moves to produce new facts that lead to a goal. Goal-driven reasoning focus on the goal,finds the rules that could produce the goal,and chains backward through successive rules and subgoals to the given facts of the problem.
Goal driven reasoning or backward chaining - an inference technique which uses IF THEN rules to repetitively break a goal into smaller sub-goals which are easier to prove. Data driven reasoning or forward chaining - an inference technique which uses IF THEN rules to deduce a problem solution from initial data.