Possible injector leaks?
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HT4100 4.1, 4.5, 4.9 Discussion, Possible injector leaks? in Cadillac Engine Technical Discussion; Is there any way to tell symptomatically if fuel injectors would be leaking? Rough running? fuel vapor odor? etc etc ...
  1. #1
    zentrade is offline Cadillac Owners Fanatic
    Automobile(s): Cadillac 1993 Deville 4.9, 1991 Eldorado Touring Coupe
    Join Date
    Dec 2006
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    316

    Possible injector leaks?

    Is there any way to tell symptomatically if fuel injectors would be leaking? Rough running? fuel vapor odor? etc etc

    I know of course they can be tested, But just wondering if there would be any symptoms in driveability or other indications.

    Thanks!

    93 deville 4.9

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  3. #2
    cadillac_tech is offline Cadillac Owners Fanatic
    Automobile(s): 2008 SRX
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    Re: Possible injector leaks?

    There may be several symptoms. If you have one you're concerned about, it should be addressed that way. A leak could cause a stumble at idle, an extended crank, a dead miss, poor fuel mileage...... To really see if one is dripping, remove the rail from the manifold while it is hot (fuel lines still attached) and watch for a drip.

  4. #3
    zentrade is offline Cadillac Owners Fanatic
    Automobile(s): Cadillac 1993 Deville 4.9, 1991 Eldorado Touring Coupe
    Join Date
    Dec 2006
    Posts
    316

    Re: Possible injector leaks?

    Thanks! I dont have any of those symptoms except for poor MPG but wouldnt rule out a leaky injector as a contributor to that.

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