09/03/2026
🔍 Check-engine light on? Misfire that comes and goes? Don’t start throwing parts at it.
Modern LS and Gen 5 LT vehicles can have similar symptoms caused by completely different problems. A misfire could be ignition, fueling, valvetrain, mechanical, or calibration related—and replacing parts without testing can get expensive fast.
At Calibrated Speed, we approach diagnostics the same way we approach performance builds: test, verify, then repair.
🔧 Check-engine light diagnostics
📊 Live data logging & analysis
⚡ Misfire and drivability diagnosis
⛽ Fuel-system testing
⚙️ Valvetrain & mechanical diagnosis
💻 Calibration and tuning issues
🏁 Repair and performance options once the problem is identified
And because we specialize in LS and Gen 5 LT platforms, if we find a problem that creates an opportunity for an upgrade—such as a failed DOD/AFM component—we can discuss the options before putting it back together.
📲 Have a GM car or truck that nobody seems to be able to figure out? Message Calibrated Speed and get it on the schedule.
Diagnose it correctly. Fix it once. 🔧🏁