Chevrolet Camaro (fourth Generation) - 1994

1994

Several changes occurred for 1994. The 4L60 automatic transmission was replaced with the more dependable and better built 4L60E that included electronic controls, and was also used in Chevrolet trucks and Tahoe of this era. Accordingly, the car's on-board computer was modified from dealing only with the engine as in 1993 and earlier, to controlling both the engine and transmission on automatic models.

The computer, in 1993, was run via Speed Density, which measured engine speed (RPM) and load (MAP in kPa) to compute airflow requirements and then use that against the VE table to get the proper fueling for conditions. An IAT (Intake Air Temperature sensor) was also used as air density changes with temperature. In 1994 however, the computer logic was changed over to a Mass Air Flow system. This system uses a Mass Air Flow Sensor placed in front of the throttle body to measure the incoming airflow into the motor. This is measured by using a heated wire in the sensor in the airstream path which has heat pulled away from it via the incoming air. This reduced heat is converted into a voltage signal which is sent to the PCM which then converts that voltage signal in to mass flow. The computer uses engine sensors to judge engine conditions and provide the proper fueling off of this mass airflow reading. This was one of the main differences between the 93 and 94+ F-Body cars (and 92-93 Vette's compared to 94-96) and one of the items that makes a 93 model unique. Another prominent difference between the "Speed Density" 93's and the 94+ cars is how the programming (or custom tuning) of the computer takes place. In 1993, the stock computer uses a Memcal chip, which is a removable chip from the factory computer. Contained in this chip is the program for the car to run. In the 1994+ cars, this was swapped to a non-removable reflashable chip, which could be reprogrammed via the Assembly Line Diagnostic Link, or ALDL, located underneath the driver side of the dash, next to the center console. Many people view this as a more user-friendly and easier way to tune the vehicle.

Dashboard gauge graphics were changed from yellow to white. There was also a spot in the gauge cluster that says ASR off. GM had every intent to put ASR or Acceleration Slip Regulation (Pontiac called it "TCS") in the 94 F-bodys, but it never made it into production until 95. The front brakes were revised on the Z28 model. Cooling fans were changed mid-year from a parallel to a series setup. On low both fans operated on 6V, but on high both operated on 12V. The V-8 LT1 equipped Camaro Z28s did 0-60 in 5.7 seconds and quarter mile times of 14.2.