HT4100 4.1, 4.5, 4.9
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HT4100 4.1, 4.5, 4.9 in Cadillac forums : Cadillac Owners Forum, 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: 58,551
    09-20-04, 01:50 AM Go to last post
  1. The "4.9 liter turbocharger, stage 1" thread.

    Started by illumina, 03-12-05 12:05 AM
    16 Pages
    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
    • Replies: 238
    • Views: 109,551
    02-24-11, 01:56 PM Go to last post
  2. Exclamation Should I flush tranny at 52K????

    Started by Msilva954, 03-23-04 07:25 AM
    4 Pages
    1 2 3 4
    • Replies: 49
    • Views: 49,604
    12-19-13, 08:52 AM Go to last post
    • Replies: 14
    • Views: 37,815
    05-17-08, 08:20 PM Go to last post
  3. Symptoms of faulty distributor pick up coil

    Started by mike93, 10-24-09 06:55 PM
    • Replies: 10
    • Views: 27,051
    10-26-09, 08:34 AM Go to last post
  4. I'm going to try the 4.1->4.9 conversion

    Started by ehall, 01-13-08 01:49 AM
    11 Pages
    1 2 3 4 5 6 7 8 9 10 11
    • Replies: 151
    • Views: 25,191
    09-19-11, 04:42 PM Go to last post
    • Replies: 9
    • Views: 20,883
    11-07-04, 10:29 PM Go to last post
  5. 4.9 litre engine firing order

    Started by dsulu, 06-21-09 08:37 PM
    • Replies: 9
    • Views: 20,363
    07-14-09, 05:32 AM Go to last post
  6. Question Ignition module failing?

    Started by DFBonnett, 11-15-04 07:06 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 20,214
    06-13-08, 09:34 PM Go to last post
  7. 1994 Cadillac Deville High Idle

    Started by soulman07, 10-15-08 08:40 PM
    2 Pages
    1 2
    • Replies: 29
    • Views: 20,089
    03-01-10, 01:26 PM Go to last post
  8. Cadillac Deville 4.9l Engine Problem

    Started by beveluv, 11-15-09 04:14 PM
    3 Pages
    1 2 3
    • Replies: 40
    • Views: 19,023
    12-08-09, 08:36 PM Go to last post
  9. What is the BEST MOTOR FLUSH out there?

    Started by caddeville, 02-28-06 01:49 AM
    2 Pages
    1 2
    • Replies: 23
    • Views: 18,463
    07-06-12, 02:34 AM Go to last post
  10. 4.9 performance

    Started by Night Wolf, 05-21-03 05:49 PM
    6 Pages
    1 2 3 4 5 6
    • Replies: 76
    • Views: 16,768
    04-02-04, 04:16 PM Go to last post
  11. Safety Safety Safety !

    Started by Stoneage_Caddy, 06-11-04 06:53 PM
    3 Pages
    1 2 3
    • Replies: 34
    • Views: 16,690
    12-15-13, 10:54 AM Go to last post
  12. 1985 Eldorado 4100 engine swap

    Started by mrboots54, 08-26-09 09:18 AM
    • Replies: 11
    • Views: 15,019
    04-11-14, 03:07 PM Go to last post
    • Replies: 80
    • Views: 14,584
    10-08-13, 09:05 PM Go to last post
  13. The DIY Injector Test Bench

    Started by Sevillian273, 04-10-10 07:45 PM
    • Replies: 11
    • Views: 14,408
    06-20-10, 06:58 AM Go to last post
  14. Boosting HT4100 Performance

    Started by DrDave, 02-21-05 04:50 AM
    2 Pages
    1 2
    • Replies: 27
    • Views: 14,364
    03-29-16, 03:48 PM Go to last post
  15. 95 Deville base 4.9 fuel pressure issues, FPR or fuel pump?

    Started by brandond25, 01-18-10 06:18 PM
    3 Pages
    1 2 3
    • Replies: 31
    • Views: 14,277
    01-31-10, 11:45 PM Go to last post
  16. Cool Is There Such A Thing As A Starter Motor Overheating?

    Started by rlowe228, 06-04-05 03:16 PM
    3 Pages
    1 2 3
    • Replies: 40
    • Views: 13,969
    08-02-05, 01:08 AM Go to last post
  17. HT4100 Check In

    Started by caddeville, 06-07-06 03:03 PM
    5 Pages
    1 2 3 4 5
    • Replies: 74
    • Views: 13,839
    02-23-10, 11:51 PM Go to last post
  18. 1987 Deville 4.1 to 4.9 Conversion

    Started by Edahall, 08-12-12 09:05 PM
    3 Pages
    1 2 3
    • Replies: 32
    • Views: 13,700
    07-16-13, 05:17 PM Go to last post
  19. Fuel Injectors 94 Deville 4.9L

    Started by Cadillac_Scout, 04-01-05 10:41 AM
    5 Pages
    1 2 3 4 5
    • Replies: 72
    • Views: 13,681
    07-29-12, 12:34 AM Go to last post
  20. Question What's so great about the 4.9 engine?

    Started by BeelzeBob, 05-18-03 10:44 AM
    3 Pages
    1 2 3
    • Replies: 41
    • Views: 13,564
    04-15-08, 12:16 AM Go to last post
  21. Need Help with timing/tune-up on 84 Cadillac Deville HT4100

    Started by henrydean40, 04-21-11 04:17 AM
    2 Pages
    1 2
    • Replies: 19
    • Views: 13,459
    01-25-14, 12:05 PM Go to last post
  22. 1985 eldorado biarritz won't start

    Started by bernier7, 01-07-12 09:50 PM
    • Replies: 14
    • Views: 13,236
    08-17-15, 10:51 PM Go to last post

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