03 DTS, Bad Code - Page 3
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 03 DTS, Bad Code in Past Cadillac Vehicle Discussion; Just make sure the connections on the starter are clean and tight....
  1. #31
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
    Automobile(s): Crimson 2001 Seville STS, 1990 Seville (RIP)
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    Just make sure the connections on the starter are clean and tight.

  2. #32
    monty_n_philly is offline Cadillac Owners Member
    Automobile(s): 03 Deville, DTS
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    Re: 03 DTS, Bad Code

    Ok, so I did the plenum and there was a rip.. with TB gasket and intake mani gaskets and all 8 O-rings changed on fuel injectors, I had my mechanic do all the spark plugs (AC Delco 4897) with new boots and springs, I still had miss fire, so I changed the front coil and is riding amazing... so the problem came when I looked at my intake... please go to the link below and go down to Ghostsoldier picture 12 or go down to picture 15.. you will see his Plenum off.. if you look below the main hole, you will see that cap thing..well my Plenum does not have that cap and the tube is open... concern..????

    http://www.cadillacforums.com/forums...ent-steps.html

  3. #33
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    That "cap" is the overpressurization valve. Does your intake have a hole where it should be, or is it blanked off?

    By "tube", do you mean where the screw would thread into?

  4. #34
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Re: 03 DTS, Bad Code

    He can't possibly have an open hole where the over pressurization valve is. If he did it would be bouncing off the rev limiter every time he started it.

  5. #35
    monty_n_philly is offline Cadillac Owners Member
    Automobile(s): 03 Deville, DTS
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    Re: 03 DTS, Bad Code

    there is no end cap (the big plastic part)... just the tubes that it screws into...

  6. #36
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Re: 03 DTS, Bad Code

    Any way you can post a picture?

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