I have 1989 corvette I need to see a manual on the canister purge system

links may help
GM Vapor Purge Valve - YouTube
How To Replace A EVAP Purge Valve On A GM Truck or SUV - YouTube
How to Replace Vapor Canister Purge Solenoid Valve V6 3.6L 10-11 Chevy Camaro - YouTube

C6 CORVETTE HOW TO REPLACE EVAP VENT SOLENOID AND ERASE P0449 CODE - YouTube

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
Chevrolet

code p 0440 refers to EVAP system--system malfunction==causes --hose connections --intake leak---EVAP canister purge valve
code p 0441 refers to EVAPO system --incorect flow detected ====causes --hose connections ---intake leak---EVAP canister purge valve
code p 0446 refers to EVAP system---vent control--circuit malfunction====causes wiring---EVAP canister purge valve ---ecm
replace the purge valve
as to where it is , the location will be in the workshop manual or have a shop point it out to you.

johnjohn2's diagram is not how the '89 Corvette vacuum lines are connected. In 1989 the vacuum source for the charcoal canister is a vacuum port on the passenger side of the throttle body. Also, the A.I.R. injection solenoids/valves were combined into a single unit.

The canisters filter needs changing.

Hi, the p0443 code is for Evaporator Canister Purge Control Solenoid Valve. The canister has charcoal in it to absorb vapors from the fuel so it can't be released into the air. When the system detects that the canister needs flushing , the purge control solenoid opens to purge the canister and the vapors are consumed by the engine,sorry I don't know where the location of this is on your car but purchasing an AUTOMOTIVE REPAIR MANUAL by Haynes from an auto parts store would be helpful. I believe the problem can be as simple as a gas cap not being tight enough! There are many things that have to work for the system to function like the solenoid / current to solenoid / leaks / stop ups etc. Like many things it's a process of elimination......... Good luck.

P1443 Evaporative Emission Control System Control Valve The Evaporative Emission Control System monitors the fuel vapor flow between the engine intake manifold and the EVAP canister. The system failure occurs when a leak or blockage between the intake manifold, the EVAP canister purge valve and the EVAP canister is detected by the PCM.

Code P1443 Possible Causes:

- Pinched, blocked or plugged fuel vapor tubes/hoses (except between fuel tank and EVAP canister)

- Damaged EVAP canister

- Disconnected, cracked or cut fuel vapor tubes/hoses (except between fuel tank and EVAP canister)

- Damaged EVAP canister purge valve

P1443 - EVAP Control System / Vacuum System Purge Control Solenoid Or Purge Control Valve Fault. A fuel tank pressure change greater than minus (-) 7 inches of water in 30 seconds occurred with a purge (fuel vapor) flow at less than 0.02 pounds per minute.

Possible Causes:

Blocked fuel vapor hose between the EVAP canister purge valve and the FTP sensor.

Blocked fuel vapor hose between the EVAP canister purge valve and the engine intake manifold.

Blocked vacuum hose between the EVAP canister purge valve solenoid and the engine intake manifold.

EVAP canister purge valve stuck closed (mechanically).

Possible Solution:
Check for blockages between the fuel tank, the EVAP canister purge valve, and the engine intake manifold. Check for obstructions in the EVAP canister purge valve diaphragm and ports.

The canister is on the passengers side near the firewall if I recall correctly.

check vacum lines for leaks in the headlight assembly,sometimes they dry rot,the vacum lines] it has to a vacum issue. you may need to replace the vacum lines with new vacum hose. you can but it by the foot at any parts store, but you'll need to carry a peice of old one to get exact size.trace the vacum lines from headlights to the source of vacum canister,just to be sure that the canister itself isn't leaking. look for cracks in the vacum lines along the way.if you find that the canister is cracked,it can be repaired by jb weld and repainted,just to keep it original.thank you for choosing fixya.com

Which code specifically? Do not assume you need a new solenoid. Our recommendation will depend on the specific code and some troubleshooting results. I usually recommend checking over all the EVAP vacuum lines and the gas cap too whenever there is a purge valve code. Check the vacuum lines at the cannister in the left rear bumper. I will paste info on the purge solenoid below.

P0440 Evaporative emission (EVAP) system - malfunction

Possible causes: Hose connection(s), intake leak, EVAP canister purge valve

P0441 Evaporative emission (EVAP) system - incorrect flow detected

Possible causes: Hose connection(s), intake leak, EVAP canister purge valve

P0442 Evaporative emission (EVAP) system - small leak detected

Possible causes: Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve

P0443 Evaporative emission (EVAP) canister purge valve - circuit malfunction

Possible causes: Wiring, EVAP canister purge valve, ECM

P0444 Evaporative emission (EVAP) canister purge valve -open circuit

Possible causes: Wiring open circuit, EVAP canister purge valve, ECM

P0445 Evaporative emission (EVAP) canister purge valve -short circuit

Possible causes: Wiring short circuit, EVAP canister purge valve, ECM

P0450 Evaporative emission (EVAP) pressure sensor - circuit malfunction

Possible causes: Wiring, EVAP pressure sensor, ECM

P0455 Evaporative emission (EVAP) system - large leak detected

Possible causes: Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve

P0456 Evaporative emission system - very small leak detected

Possible causes: Mechanical fault, hose connection(s), EVAP pressure "sensor

P0457 Evaporative emission system - leak detected (fuel cap loose/off)

Possible causes: Mechanical fault, hose connection(s), EVAP pressure sensor

P0458 Evaporative emission system, purge control valve -circuit low

Possible causes: Wiring short to earth, EVAP valve

P0459 Evaporative emission system, purge control valve -circuit high
Possible causes: Wiring short to positive, EVAP valve

Evaporative Emission Purge Solenoid

Description & Operation
The duty cycle EVAP canister purge solenoid (DCP) regulates the rate of vapor flow from the EVAP canister to the intake manifold. The Powertrain Control Module (PCM) operates the solenoid.
During the cold start warm-up period and the hot start time delay, the PCM does not energize the solenoid. When de-energized, no vapors are purged. The PCM de-energizes the solenoid during open loop operation.
The engine enters closed loop operation after it reaches a specified temperature and the time delay ends. During closed loop operation, the PCM cycles (energizes and de-energizes) the solenoid 5 or 10 times per second, depending upon operating conditions. The PCM varies the vapor flow rate by changing solenoid pulse width. Pulse width is the amount of time that the solenoid is energized. The PCM adjusts solenoid pulse width based on engine operating condition.
Removal & Installation
The duty cycle evaporative (EVAP) canister purge solenoid is located in the engine compartment near the brake master cylinder.

1. Disconnect electrical connector at solenoid.
2. Disconnect vacuum lines at solenoid.
3. Lift solenoid slot from mounting bracket for Removal & Installation.

To Install:

1. Position solenoid slot to mounting bracket.
2. Connect vacuum lines to solenoid. Be sure vacuum lines are firmly connected and not leaking or damaged. If leaking, a Diagnostic Trouble Code (DTC) may be set with certain emission packages.
3. Connect electrical connector to solenoid.
   

Purge solenoid location:


EVAP cannister location: