1985 DeVille Whats That, (Fuel System Canister Valve?)
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HT4100 4.1, 4.5, 4.9 Discussion, 1985 DeVille Whats That, (Fuel System Canister Valve?) in Cadillac Engine Technical Discussion; hey quys, on my cadillac behind the coolant overflow tank and forward of the right front wheel well is a ...
  1. #1
    jetengine is offline Cadillac Owners Member
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    1985 DeVille Whats That, (Fuel System Canister Valve?)

    hey quys, on my cadillac behind the coolant overflow tank and forward of the right front wheel well is a canister with hoses going to it and it looks like a electric switch on top of it, i think it has to do with the fuel system, my car was surging alittle i checked all the vacuum lines and found one missing on the canister, i got a new hose, could a missing hose on that item make the car idle surge? thanks

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    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
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    Re: 1985 DeVille Whats That, (Fuel System Canister Valve?)

    That's the EVAP system charcoal canister. If the hose was on the vacuum side (to the manifold), then it is a vacuum leak and can definitely cause a surge.

  4. #3
    jetengine is offline Cadillac Owners Member
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    Re: 1985 DeVille Whats That, (Fuel System Canister Valve?)

    thank you

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