1995 Chevy Blazer Evaporative emission control system

Tiny
WYSAKY
  • MEMBER
  • 1995 CHEVROLET BLAZER
Engine Performance problem
1995 Chevy Blazer 6 cyl Four Wheel Drive Automatic

I got error code P0441 on my 95 blazer. Started trouble shooting by checking out the vapor canister at the rear of the car and when I pulled the purge hose off gas came out of it. Does this mean the canister is ruined and I have to replace it?
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Saturday, March 27th, 2010 AT 7:09 PM

3 Replies

Tiny
HMAC300
  • EXPERT
No it's not ruined. When you go over 30 it sucks it back into the engine or puts it in the tank. Your purge vavle is probably shot though.
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Sunday, March 28th, 2010 AT 4:35 PM
Tiny
WYSAKY
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How would I know if the purge valve is shot and why is there gas in the vapor canister? When I fill the tank up I do not top it off.
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Monday, March 29th, 2010 AT 5:55 PM
Tiny
HMAC300
  • EXPERT
This is the proper terminology for it. Your valve is shot because the orfice is opening to much and sucking fuel into the cannister.

In an evaporative emission control system of an internal combustion engine wherein volatile fuel that has evaporated from a liquid fuel tank is collected in a collectioncanister that, under certain engine operating conditions detected by an electronic control system of the engine, is purged to the engine by a purge regulator under the control of said electronic control system so as to cause collected fuel vapors to becombusted by the engine, the improvement which comprises a variable orifice that conjointly with said purge regulator exercises control over the vapor flow from said canister to the engine and functions to selectively restrict vapor flow from thecanister to the engine in correlation with the degree to which the engine is being throttled, and a sensor for supplying the electronic control system with a signal indicative of the degree to which the engine is being throttled and hence also the degreeof restriction imposed by said variable orifice on the flow from the canister to the engine so that the electronic control system can take the degree of restriction imposed by said variable orifice into account in setting the purge regulator.
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Monday, March 29th, 2010 AT 8:35 PM

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