Intermittent stalling

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HT4100 4.1, 4.5, 4.9 Discussion, Intermittent stalling in Cadillac Engine Discussion; Hi, I'm a new member so forgive me if I am posting this in the wrong spot. I have a ...
  1. #1
    Wayne Bradley is offline Cadillac Owners Member
    Automobile(s): 1983 El Dorado
    Join Date
    Jul 2013

    Intermittent stalling

    Hi, I'm a new member so forgive me if I am posting this in the wrong spot. I have a 1983 Eldorado which has an intermittent problem when it stalls on initial acceleration, like it is being starved of fuel. This only occurs on an irregular basis. Has anyone else come accross this problem? Another issue I have is a loud rattle in the steerin cloum, like something has come loose, but only whilst under acceleration. When you reach speed and decelerate the rattle stops - very odd.

    If anyone can assist I would appreciate your advise.


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  3. #2
    carnut is offline Cadillac Owners Master
    Automobile(s): 1999 BMW 740 Il. 2005 Jag XK8, 1988 Mercedes Benz 300 SE
    Join Date
    Feb 2003

    Re: Intermittent stalling

    This engine relies on a throttle position sensor (TPS) to vary electrical signals to the computer to vary the duration of fuel sprayed thru the 2 injectors. If the TPS has an electrically open section as its lever rotates, fuel will quit being sprayed until it passes the open section. The result, bog or quits. So, with the factory service manual you need to confirm its initial setting and whether it goes electrically open as the throttle is slowly opened. If the test and adjustment are within spec then I would suspect the filter (sock) on the fuel level sending unit in the tank as the culprit. Partially plugged up, it can lower fuel pump pressure enough to cause a stall. All these tests and diagnosis assume you have the manual and are more than an average technician!

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