2003 DHS - Sluggish - EGR?
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Northstar Engines and System Technical Discussion Discussion, 2003 DHS - Sluggish - EGR? in Cadillac Engine Technical Discussion; My son's 2003 DHS had been running fine but after he filled-up the caddy and few miles down the road ...
  1. #1
    MBOK is offline Cadillac Owners Member
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    2003 DHS - Sluggish - EGR?

    My son's 2003 DHS had been running fine but after he filled-up the caddy and few miles down the road it began running sluggish, knocking...at WOT the RPMs run up but shifting is slow and it does not get down the road as you would expect with WOT.

    Easing into the throttle the caddy drives and shifts fne and will operate at hwy speeds. We put some fuel cleaner in and are running the fuel out.

    Any thoughts? Just bad fuel, sticking EGR valve? We haven't checked for thrown codes yet but plan to.

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  3. #2
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: 2003 DHS - Sluggish - EGR?

    It sounds like he put diesel in it. Did the pump hose have a green handle?
    Don't mess with Binky Bear!


  4. #3
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 2003 DHS - Sluggish - EGR?

    Diesel......best guess. Slug of water from low station tank.......maybe. Car.......probably not.

  5. #4
    MBOK is offline Cadillac Owners Member
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    Re: 2003 DHS - Sluggish - EGR?

    Well, the diesel nozzle should not fit but incase he did put some diesel...what would the outcome be. Simply run the fuel out or drain?

  6. #5
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
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    Re: 2003 DHS - Sluggish - EGR?

    Doubt that is the case. If there was too much diesel it probably would not even run.

  7. #6
    MBOK is offline Cadillac Owners Member
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    Re: 2003 DHS - Sluggish - EGR?

    Yeah, it does not smoke just won't get up and go. RPMS run up where there supposed to be at WOT but the caddy is just moving like it should. Rolling at about 30 and going to WOT it downshifts and RPMS go up and it accelerates but not anything like it should.

    Any more thougts?

  8. #7
    MBOK is offline Cadillac Owners Member
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    Re: 2003 DHS - Sluggish - EGR?

    Yeah, it does not smoke just won't get up and go. RPMS run up where there supposed to be at WOT but the caddy is just [U]not moving like it should. Rolling at about 30 and going to WOT it downshifts and RPMS go up and it accelerates but not anything like it should.

    Any more thougts?

  9. #8
    JimD is offline Cadillac Owners Connoisseur
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    Re: 2003 DHS - Sluggish - EGR?

    Trouble codes might provide a clue. Here is how to display trouble codes (DTCs):
    http://www.cadillacforums.com/forums...s-warning.html

  10. #9
    Ranger's Avatar
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    Re: 2003 DHS - Sluggish - EGR?

    Plugged CAT? Any DTC's?

  11. #10
    NoMaBeach is offline Cadillac Owners Member
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    Re: 2003 DHS - Sluggish - EGR?

    Try the fuel filter. I change mine every 15k.

  12. #11
    JimD is offline Cadillac Owners Connoisseur
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    Re: 2003 DHS - Sluggish - EGR?

    Good grief!

  13. #12
    Ranger's Avatar
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    Re: 2003 DHS - Sluggish - EGR?

    My sentiments exactly Jim.

  14. #13
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 2003 DHS - Sluggish - EGR?

    Something escapes me............

  15. #14
    JimD is offline Cadillac Owners Connoisseur
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    Re: 2003 DHS - Sluggish - EGR?

    Quote Originally Posted by submariner409 View Post
    Something escapes me............
    Read Post #10.

  16. #15
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 2003 DHS - Sluggish - EGR?

    I did before I posted.

    (as an aside, I got antsy and replaced the fuel filter at 43,000 on my '02 in Sept. Cut old one open. Looked like I had put it in the day before. Dead nuts clean. Non-issue.)

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