How does fuel injection work in a 1994 Corvette?
The 1994-1996 OBD computer system utilizes mass-air and MAP sensors to control fuel delivery. The 1994-1996 cars utilize sequential fuel injection, which means fuel is injected only when needed. These cars have better fuel control and respond better to high performance modifications.
What kind of gas does a 90 Vette use?
Parts replaced; fuel filter, plugs, wires, distributer cap, rotor, EGR valve, oxygen sensor, injectors cleaned, throttle body cleaned, dry gas used in tank. Surge sometimes causes cutoff. Ran two tanks of Amoco Premium Gas – same condition on other 90 vette (115k).
What causes a slow idle on a corvette?
A slow, unstable idle may be caused by a system problem that cannot be overcome by the IAC. Out of control range IAC “SCAN” tool counts will be above 60 if idle is to low, and zero counts if idle is to high. The following checks should be made to repair a non-IAC system problem. Vacuum Leak (High Idle) – If idle is to high, stop the engine.
What was the first fuel control system for corvettes?
Speed density was the first fuel control system used on 1982-1984 Corvettes. It was also used on the 1990-1993 cars. Speed density uses a manifold absolute pressure sensor (MAP sensor) to calculate the necessary fuel load.
What kind of fuel injection does a 1995 Corvette have?
These cars have better fuel control and respond better to high performance modifications. The 1995-1996 cars have OBDII fuel control systems that follow more stringent fuel emission control standards. Catalytic converters have oxygen sensors checking their performance as well as controlling fuel in closed loop.
What was the Cold Start system in a 1989 Corvette?
1985-1988 cars use a stand-alone cold-start system that requires intake manifold porting to allow cold start fuel flow. This porting hurts power output. 1989 cars had no cold-start system, along with intake manifold porting changes. The 1989 cold start event is handled by the PROM (chip).
Speed density was the first fuel control system used on 1982-1984 Corvettes. It was also used on the 1990-1993 cars. Speed density uses a manifold absolute pressure sensor (MAP sensor) to calculate the necessary fuel load.
What should the exhaust pressure be in a corvette?
Three pounds of exhaust system pressure is acceptable. Any pressure reading in excess of three pounds indicates a clogged exhaust system. PCV (Positive Crankcase Ventilation) valves are very important for proper engine performance. The PCV valve allows a pressure drop (vacuum) in the engine’s crankcase; this helps piston rings seal.