I've always been able to depend on All Pro for years, to figure mystery problems out. And they always take a financially conservative approach to those worst-of-the-worst problems, the "Intermittent" issues that plague my vehicles for weeks or months, until I finally take it in to them and the failure or symptom stops ! 😱 All Pro doesn't just throw money at the problem, they takes steps one at a time, ruling things out if the mystery issue comes and goes. The latest for me was intermittent misfires my OBD adapter and Torque OBD app identified, but the misfires kept coming and going....running perfectly for days or weeks, even high-speed highway driving, then suddenly sputtering and misfiring like I was going to need a tow as I was driving 30 down 3rd St. 🙄 All Pro finally found one fuel injector obstructed by the intake manifold that was breaking down, sometimes fine, then suddenly shorting. That was a big job pulling all that off to get to it, so they wisely suggested I should replace the other two injectors under the manifold while we had it off, as it would be "False Economy" to risk leaving the other two original injectors and burying them underneath the intake manifold again. At ~$80 each for 2 more, I agreed, as the labor pulling that all apart again if either the other 2 started going bad would have been stupid. Moral of the story, All Pro is diligent, and you can trust their judgement.