LTG Fuel+Air Repair Specs

Written By LTG Motorworks .

This guide covers the key specifications, torque values, and sensor reference data for the LTG 2.0L turbo engine. Whether you’re troubleshooting a bad reading, replacing fuel or air components, or reinstalling sensors after a repair, having the correct specs ensures reliability and prevents costly mistakes. All values are presented in both metric and standard units, with sensor resistance ranges provided for quick diagnostics using a multimeter.

1. Intake Air Temperature (IAT) Sensor – Temp vs. Resistance

If your IAT sensor is reading wrong or throwing a code, you can check it with a multimeter. Resistance changes with temperature.

Hitachi Sensor:

  • -40 °C / -40 °F → 37,527 – 49,882 Ω

  • -20 °C / -4 °F → 13,110 – 16,329 Ω

  • -10 °C / 14 °F → 8,145 – 9,851 Ω

  • 0 °C / 32 °F → 5,205 – 6,122 Ω

  • 20 °C / 68 °F → 2,298 – 2,570 Ω

  • 25 °C / 77 °F → 1,900 – 2,100 Ω

  • 40 °C / 104 °F → 1,073 – 1,226 Ω

  • 60 °C / 140 °F → 537 – 639 Ω

  • 80 °C / 176 °F → 289 – 356 Ω

  • 100 °C / 212 °F → 165 – 210 Ω

  • 120 °C / 248 °F → 99 – 129 Ω

  • 140 °C / 284 °F → 62 – 83 Ω

  • 150 °C / 302 °F → 49 – 67 Ω

Delco Sensor:

  • -40 °C / -40 °F → 42,661 – 54,224 Ω

  • -20 °C / -4 °F → 14,039 – 17,333 Ω

  • -10 °C / 14 °F → 8,529 – 10,399 Ω

  • 0 °C / 32 °F → 5,358 – 6,458 Ω

  • 20 °C / 68 °F → 2,308 – 2,727 Ω

  • 25 °C / 77 °F → 1,904 – 2,236 Ω

  • 40 °C / 104 °F → 1,113 – 1,292 Ω

  • 60 °C / 140 °F → 571 – 655 Ω

  • 80 °C / 176 °F → 309 – 351 Ω

2. Engine Coolant Temp (ECT) Sensor – Temp vs. Resistance

  • 100 °C / 212 °F → ~175–197 Ω

  • 120 °C / 248 °F → ~103–116 Ω

  • 140 °C / 284 °F → ~67–73 Ω

  • 150 °C / 302 °F → ~54–59 Ω

3. Barometric Pressure vs. Altitude

  • 4,267 m / 14,000 ft → 56–64 kPa (8.1–9.3 PSI)
    Lower altitudes will have higher pressure, higher altitudes will have lower pressure.

4. Common Torque Specs (Fuel, Air, Sensors, Turbo)

(Metric first, English in parentheses)

  • Accelerator Pedal Bolts → 9 N·m (80 lb·in)

  • Air Cleaner & Outlet Duct Bolts → 9 N·m (80 lb·in)

  • Camshaft Position Solenoid / Sensor Bolts → 10 N·m (89 lb·in)

  • Charge Air Cooler Tube/Radiator Fasteners → 10 N·m (89 lb·in)

  • Crankshaft Position Sensor → 10 N·m (89 lb·in)

  • ECM Bracket → 7 N·m (62 lb·in)

  • Fuel Rail Bolts → 25 N·m (18 lb·ft)

  • Fuel Pressure Sensor → 33 N·m (24 lb·ft)

  • HPFP Bolts → 15 N·m (11 lb·ft)

  • HPFP Cover Bolts → 10 N·m (89 lb·in)

  • HPFP Intermediate Pipe Fittings → 26 N·m (19 lb·ft)

  • Fuel Tank Strap Bolt → 20 N·m (15 lb·ft)

  • HO2S (O2 Sensor) → 42 N·m (31 lb·ft)

  • Ignition Coil Bolt → 10 N·m (89 lb·in)

  • Knock Sensor → 10 N·m (89 lb·in)

  • Spark Plugs → 20 N·m (15 lb·ft)

  • Throttle Body → 10 N·m (89 lb·in)

  • Turbo Wastegate Actuator → 20 N·m (15 lb·ft)

  • Turbo Wastegate Regulator → 7.8 N·m (69 lb·in)

  • Vacuum Pump → 10 N·m (89 lb·in)

5. Sealants & Materials

(These can be swapped for equivalent name-brand products — no need for GM-only parts unless under warranty)

  • Anti-Seize → For O2 sensor threads

  • Thread Sealant → For coolant temp sensor, cam gear plug, fuel rail bolts, IAT threads

  • Top Engine Cleaner → For intake & valve carbon cleaning

  • Lubricant → For O-rings and electrical connectors

LTG Motorworks .
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