Poor Performance

Depending on the nature of the performance problem, check the following:

1. MISFIRE OR ROUGH RUNNING
a. Fuel injectors
b. Fuel contamination
c. Fuel Pressure Regulator
d. Manifold Absolute Pressure Sensor
e. TDC/CKP/CYP Position Sensor
f. Exhaust Gas Recirculation System

2. LOSS OF POWER

a. Fuel Pump
b. Fuel filter
c. Fuel Injector
d. Throttle Position Sensor
e. manifold Absolute Pressure Sensor
f. Chamber volume control system
g. Throttle body
h. Throttle cable

2. FAILS EMISSION TEST

a. Three Way Catalytic Converter
b. Evaporative Emission Controls
c. Exhaust Gas Recirculation System
d. Fuel Pressure Regulator
e. Fuel Injector
f. Fuel Injector Resistor
g. Manifold Absolute Pressure Sensor
h. Heated Oxygen Sensor


NOTE: Sub-systems are ordered according to greatest likelihood of failure and should be checked in the order that they are listed.