Have any of you used a GM TBI fuel test port adapter? If so did you leave it connected after you used it for testing rather than removing it? Actron say to remove it, OTC says it might be ok to leave it on, but they don't recommend because it's part of the fuel system. If its on there for testing I think it should be okay to leave it on as other fuel injection systems, namely port sequential systems such as on new vehicles have a permanent test port built into the fuel rail. Basically they are both just schrader valves.
Thanks for your answers,
Bill
Thanks for your answers,
Bill