HOW TO REMOVE EVAPORTATOR CORE ? - 1994 Chevrolet C1500

Worn motor bearings, bent fan blade or out of balance, many other issues like sheet metal vibration.

I had the codes tell me this was bad. I replaced and it helped but didn't fix. What I eventiallly found was that I removed the charcoal canister and blew it out. Wow the dust that came out. Fixed the problem. Before you reassemble make sure you blow lines out.

If u get the Vacuum Schematic can u Link it PLEASE [email protected].. thanks

http://www.obd-codes.com/p0440

You should find the evaporator core in the heater box, near the heater core. Never had one fail, unless physically damaged in accident or similar case.

P0404? What engine? B1241? check the numbers again.

It is the port that is closer to the firewall and evaporter, NOT the port that is close to the compressor.

gas cap loose? could be mileage milestone light go to auto zone or advanced auto they'll read your codes for u for free

This could be a # of problems but try these: Remove gas cap and carefully inspect it and the fuel filler neck for small cracks and/or distortion/dirt. Under the hood there is a small green cap which is the test port for the evap system, remove it and check the schrader valve to be sure its tight ( left hand threads!!!). Check all hoses attached to this for cracks/breaks.Other than this a diagnostic will have to be ran with a smoke machine to pin point leaks or valve/switch/solenoid/canister failure.

You have a vaccum leak somewhere, try the map sensor vaccum or the EGR Control valve vaccum