This vehicle does not utilize an electronic MAP sensor. Manifold vacuum is used directly by the carburetor for mechanical functions including power valve operation and distributor vacuum advance control. Typical idle vacuum should be 16-20 inches Hg with healthy engine, dropping to 5-8 inches Hg under wide open throttle acceleration.

This vehicle predates electronic fuel injection and engine management systems by approximately 15 years. Air metering and fuel mixture is accomplished entirely through mechanical carburetor operation using venturi vacuum principles, air bleeds, and calibrated jets. No mass airflow sensing capability exists on this vehicle.

This vehicle is equipped with a carburetor (typically Carter AVS or Holley 4-barrel) and mechanical fuel pump driven by the camshaft. No electronic fuel injection system is present. Fuel delivery is controlled mechanically through carburetor jets, float bowl, accelerator pump, and power valve based on engine vacuum and throttle position.

Primary should show clean 12-14V dwell period during coil saturation, then sharp drop to near 0V followed by negative spike of -150V to -250V as magnetic field collapses. Dwell time should be consistent across all cylinders at approximately 35-40% duty cycle at idle with points-type ignition or electronic ignition module.

Secondary should display sharp firing spike of 8000-15000V with clean rise time under 10 microseconds, followed by horizontal burn line at 1500-3000V lasting 1-2 milliseconds. Coil oscillations after burn should dampen quickly within 3-4 cycles. All 8 cylinders should show consistent firing voltages within 3kV of each other.

The 1972 Dodge Challenger was built before catalytic converter requirements (1975 federal mandate) and has no downstream oxygen sensors or catalyst monitoring capability. The exhaust system consists of cast iron manifolds, head pipes, and mufflers with no emission control sensors.

The 1972 Dodge Challenger 360ci was manufactured before federal oxygen sensor mandates (which began in 1975-1981 depending on manufacturer and state). This vehicle has no closed-loop fuel control, computer, or oxygen sensors - fuel metering is accomplished entirely through carburetor calibration.

The 1972 Dodge Challenger 360ci uses a traditional distributor mechanically driven by the camshaft to provide cylinder identification and firing order sequencing. There is no electronic camshaft position sensor on this carbureted, pre-computer controlled engine.

The 1972 Dodge Challenger 360ci V8 was equipped with either a conventional breaker point ignition system or Chrysler's early electronic ignition (depending on configuration), neither of which utilize a crankshaft position sensor. Engine position is determined mechanically through the distributor shaft driven by the camshaft.

The 1972 Dodge Challenger 360ci is equipped with a carburetor (typically Carter AVS or Holley 4-barrel depending on application) with purely mechanical throttle linkage. Throttle position sensing did not exist on production vehicles of this era as there was no electronic engine control module.

The 1972 Dodge Challenger uses a conventional hydraulic brake system with manual or power-assisted braking. Anti-lock braking systems were not introduced to production vehicles until the late 1970s and were not common on Chrysler products until the late 1980s.

The 1972 Dodge Challenger 360ci uses a fully mechanical speedometer system. A nylon gear in the transmission tailshaft drives a flexible cable that rotates the speedometer head. There is no electronic speed sensor or electrical signal to measure with an oscilloscope.

Cold engine (70°F) should show approximately 2.0-2.5V at the gauge unit connection. As engine warms to operating temperature (180-195°F), voltage should drop smoothly to 0.5-1.0V. Voltage should remain steady at operating temperature with minimal fluctuation.

The 1972 Dodge Challenger 360ci V8 uses a carburetor-based fuel system and does not employ an intake air temperature sensor. This sensor type was introduced with later electronic engine management systems.

1972 Dodge Challenger Waveform References

Airflow Sensors

Fuel System

Ignition System

Oxygen Sensors

Position Sensors

Speed Sensors

Temperature Sensors