Took my truck in twice and both times they failed ...

Took my truck in twice and both times they failed to properly diagnose and fix the problem. I was told both times that it "runs good now" only to have the issues arise not even 500ft away from the shop. After spending nearly $180 each visit, I realized that instead of bringing it back to them and complaining, I should take it to someone who actually knows how to properly diagnose a vehicle.