Mitsubishi Eclipse II technical information manual page 80

text version of content this owner's manual page from owners manual to the vehicle Mitsubishi Eclipse, year of production 1995 - 1999:

ENGINE - Emission Control System I-59 I EVAPORATIVE EMISSION CONTROL SYSTEM N71AP03AA During the cold start warm-up period and the hot The evaporative emission control system prevents start time delay, the PCM does not energize the id the emission of fuel tankvapors into the atmosphere. solenoid. When de-energized, no vapors are purged. When fuel evaporates in the fuel tank, the vapors The PCM de-energizes the solenoid during open pass through vent hoses or tubes to the charcoal filled EVAP canister. The EVAP canister temporarilyloop operation. The engine enters closed loop operation after it holds the vapors. Through the EVAP purge solenoid, reaches a specified temperature and the pro- the power-train control module (PCM) allows intake grammed time delay ends. During closed loop op- manifold vacuum to draw vapors into the combustion eration, the PCM energizes and de-energizes the chambers during certain operating conditions. The solenoid regulates vapor flow from the canister to solenoid approximately 5 to 10 times per second, the engine. depending upon operating conditions. The PCM va- ries the vapor flow rate by changing solenoid pulse OPERATION width. Pulse width is the amount of time the solenoid de-energizes. The EVAP purge solenoid regulates the rate of vapor flow from the EVAP canister to the throttle body. The PCM operates the solenoid. PULSED SECONDARY AIR INJECTION SYSTEM N71AP03AA OPERATION Only manual transaxle vehicles have a pulsedsec- ondary air injection system. The system injects fresh The PCM controls the ground path for the solenoid. air upstream of the catalytic convertor. It operates When the PCM grounds the solenoid, fresh air from for a short period after cold engine start-up until the air cleaner flows through the aspirator valve the engine coolant temperature reachesapproxi- mately 5% (125°F) to the catalytic convertor. The aspirator valve prevents exhaust gases from The secondary air injection system contains: flowing into the fresh air stream, at the air cleaner l Pulsed secondary air injection valve when the solenoid is grounded. If the aspirator valve malfunctions, a popping noise could be heard during l Pulsed secondary air injection solenoid l Connecting hoses and tubes cold start throttle stabs. Pulsed secondary Pulsed secondary air injection solenoid I AFU0015 I id

owners manual Mitsubishi Eclipse

owners manual Mitsubishi Eclipse - year of production: 1995, 1996, 1997, 1998, 1999 - Mitsubishi Eclipse II technical information manual EN