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Cadillac Forum: HT4100 4.1, 4.5, 4.9

This forum is to discuss the newer aluminum block Cadillac engines.

  1. Sticky Thread Sticky: OBD I codes for 4.x Engines

    Started by DaveSmed, 09-20-04 01:50 AM
    • Replies: 0
    • Views: 58,970
    09-20-04, 01:50 AM Go to last post
  1. Performance parts for caddy 4.9 engine?

    Started by megatron, 06-13-05 08:49 PM
    • Replies: 1
    • Views: 1,460
    06-13-05, 11:35 PM Go to last post
  2. Radiator cap PSI for 4.9

    Started by johnp, 06-13-05 03:35 AM
    • Replies: 1
    • Views: 695
    06-13-05, 05:59 PM Go to last post
  3. 1990 4.5 needs new injectors

    Started by BillW, 06-01-05 10:59 PM
    • Replies: 5
    • Views: 1,007
    06-13-05, 01:09 PM Go to last post
  4. Unhappy 4.1 Biarritz hesitation and stalling - long with lots of info!

    Started by Landshark, 06-04-04 08:47 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 2,725
    06-13-05, 01:10 AM Go to last post
  5. Timing 94 Deville

    Started by Big Bear, 06-10-05 08:59 AM
    • Replies: 5
    • Views: 1,010
    06-11-05, 03:01 PM Go to last post
  6. URGENT!! Muffler?

    Started by cruella89deville, 06-05-05 11:16 PM
    • Replies: 12
    • Views: 829
    06-09-05, 11:40 PM Go to last post
  7. Code 19....1984 DeVille

    Started by rollerz70, 05-31-05 07:08 PM
    • Replies: 2
    • Views: 718
    06-08-05, 07:16 AM Go to last post
  8. rough running after warm up

    Started by genenalli, 06-08-05 07:06 AM
    • Replies: 0
    • Views: 550
    06-08-05, 07:06 AM Go to last post
  9. Illumina /Bbob/Nodh and other Tech types

    Started by Stoneage_Caddy, 06-03-05 04:39 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 1,364
    06-07-05, 10:49 AM Go to last post
    • Replies: 2
    • Views: 510
    06-06-05, 11:46 PM Go to last post
  10. 83 coupe air pump

    Started by cton, 06-06-05 11:06 PM
    • Replies: 0
    • Views: 594
    06-06-05, 11:06 PM Go to last post
  11. Removing cat-converter...good idea or no?

    Started by Msilva954, 06-06-05 09:32 AM
    • Replies: 5
    • Views: 1,018
    06-06-05, 10:28 PM Go to last post
  12. 4.5 Performance?

    Started by cruella89deville, 06-02-05 10:20 AM
    • Replies: 6
    • Views: 1,074
    06-05-05, 12:34 AM Go to last post
  13. how common are coolant leaks in 4.9

    Started by I~LUV~Caddys8792, 05-29-05 02:07 AM
    • Replies: 3
    • Views: 695
    06-05-05, 12:24 AM Go to last post
  14. My Caddy won't start.

    Started by 801Hill, 06-01-05 12:02 AM
    • Replies: 6
    • Views: 867
    06-04-05, 08:04 PM Go to last post
  15. Possible Seville Engine Swap

    Started by FunkyPizzaMan, 06-03-05 08:58 AM
    • Replies: 3
    • Views: 1,459
    06-04-05, 02:36 PM Go to last post
  16. Question E39 Code

    Started by ja killz, 06-02-05 07:18 PM
    • Replies: 3
    • Views: 3,633
    06-03-05, 10:07 PM Go to last post
  17. Question ht4100 bars leaks crap help

    Started by fullserviceman, 06-01-05 11:07 PM
    • Replies: 5
    • Views: 1,237
    06-03-05, 11:48 AM Go to last post
    • Replies: 10
    • Views: 1,288
    06-02-05, 06:58 PM Go to last post
  18. rumble in the 'ville

    Started by cruella89deville, 06-01-05 12:23 AM
    • Replies: 4
    • Views: 581
    06-02-05, 03:20 PM Go to last post
    • Replies: 4
    • Views: 940
    06-01-05, 03:14 AM Go to last post
  19. Knock

    Started by Ghost C, 05-31-05 11:26 AM
    • Replies: 2
    • Views: 690
    05-31-05, 11:28 PM Go to last post
    • Replies: 0
    • Views: 698
    05-31-05, 06:06 PM Go to last post
  20. 4.5L Valve Pinging / Clattering

    Started by bantar, 04-26-05 11:25 PM
    2 Pages
    1 2
    • Replies: 23
    • Views: 1,934
    05-30-05, 01:29 AM Go to last post
  21. Exclamation Stuck with a HT4100? I have the solution!

    Started by try2playJAY, 05-25-05 10:54 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 1,806
    05-30-05, 01:03 AM Go to last post

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