Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't Bother

These injectors did not work at all. The engine would barely start and ran rough when it bothered to run at all. Could not accellerate as one injector would hiccup and activate late causing severe miss in the firing sequence. I reinstalled three times to make certain it wasn't me causing the problem. Thankfully, Amazon has an incredible return policy and reimbursed me in full. They even paid for return shipping.