1979 Seville fuel injection?
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5.0 and 5.7 Discussion, 1979 Seville fuel injection? in Cadillac Engine Technical Discussion; I am trying to troubleshoot my 79 seville without much luck. The car is flooding at start. The only way ...
  1. #1
    wcwalker is offline Cadillac Owners Member
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    1979 Seville fuel injection?

    I am trying to troubleshoot my 79 seville without much luck. The car is flooding at start. The only way it will run is WOT or with the tank fuel pump unplugged.

    I have changed the fuel pressure regulator and cleaned the injectors. The injectors were fine and fuel pressure is 39psi at idle. The car sat in my garage for 2 years, when I put it away it ran fine. I did not do anything to preserve it. I hate just replacing components and don't know where to go for help.

    Chuck

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  3. #2
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
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    Re: 1979 Seville fuel injection?

    Service manual is a must. Quick check without any manual would be to see if BOTH temp sensors measure the same resistance when stone cold. The 2 sensors are exactly the same part number. Make sure you have a good vacuum signal to the ECU under the dash. A vacuum leak will make the thing dump fuel. Get a spare ECU from ebay and keep it with the car in case....
    Some people swap the 2 temp sensors while looking for replacements. 1 is much more important than the other but I don't know which.

  4. #3
    wcwalker is offline Cadillac Owners Member
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    Re: 1979 Seville fuel injection?

    Thanks for your thoughts Ape man. I got lucky and bought an ECU put it in and end of story.

  5. #4
    Jake072 is offline Cadillac Owners Member
    Automobile(s): 1979 Seville
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    Re: 1979 Seville fuel injection?

    Did you have any luck fixing the problem? What did it turn out to be? I am having the exact same issue with my '79 seville.

    Thanks

  6. #5
    Kriegar is offline Cadillac Owners Member
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    Re: 1979 Seville fuel injection?

    wcwalker
    Cadillac Owners Member
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    Re: 1979 Seville fuel injection?
    Thanks for your thoughts Ape man. I got lucky and bought an ECU put it in and end of story.

  7. #6
    Jake072 is offline Cadillac Owners Member
    Automobile(s): 1979 Seville
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    I guess I missed that post. Thanks!

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