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: 55,461
    09-20-04, 01:50 AM Go to last post
  1. Need trouble codes for '83 HT-4100 Eldo

    Started by baldizzone‎, 06-22-04 11:00 AM
    • Replies: 6
    • Views: 4,356
    08-23-16, 03:13 AM Go to last post
  2. E91 Code

    Started by waltgaffney‎, 08-22-16 12:14 PM
    • Replies: 0
    • Views: 46
    08-22-16, 12:14 PM Go to last post
  3. Unhappy Eldorado 4.1 motor problem

    Started by Pete Newman‎, 02-06-05 11:07 AM
    • Replies: 7
    • Views: 826
    08-17-16, 11:47 AM Go to last post
  4. Your experience with the HT 4100?

    Started by 85SevilleFan‎, 07-28-16 03:09 PM
    • Replies: 5
    • Views: 143
    08-17-16, 11:24 AM Go to last post
  5. Performance engine for Deville 1984

    Started by Glibcon‎, 07-07-16 05:13 PM
    • Replies: 1
    • Views: 159
    07-07-16, 05:40 PM Go to last post
  6. Coupe DeVille 4.1 1984 Error codes 32,34,36,52

    Started by SamDeVi‎, 06-15-16 01:36 PM
    • Replies: 1
    • Views: 140
    07-06-16, 10:19 PM Go to last post
  7. 4.9 injector replacement questions

    Started by CaddilacJohn‎, 05-26-16 10:05 PM
    • Replies: 2
    • Views: 188
    06-02-16, 05:15 PM Go to last post
    • Replies: 4
    • Views: 301
    05-28-16, 10:36 AM Go to last post
  8. 4.9 High NOx, Failed Smog, stumped and need help!

    Started by CADDCT‎, 04-03-16 08:56 PM
    • Replies: 7
    • Views: 460
    05-23-16, 05:09 AM Go to last post
  9. Minimum Air Settings for 82 Cad 4.1 V8 HT4100

    Started by hotrodjohn71‎, 04-19-16 01:11 PM
    • Replies: 2
    • Views: 235
    05-19-16, 10:32 AM Go to last post
  10. HT 4100 oil pan capacity question

    Started by Duane Hayes‎, 01-11-13 09:21 PM
    • Replies: 8
    • Views: 2,546
    05-14-16, 05:08 PM Go to last post
  11. Surging Idle on 82 Cad Fleetwood

    Started by hotrodjohn71‎, 04-07-16 07:18 PM
    • Replies: 8
    • Views: 251
    04-10-16, 10:21 AM Go to last post
    • Replies: 1
    • Views: 147
    04-03-16, 04:56 AM Go to last post
    • Replies: 1
    • Views: 148
    03-31-16, 11:10 PM Go to last post
  12. 82 Coupe DeVille 4.1 Belt Replacement

    Started by 82_CoupeDeville‎, 03-31-16 10:49 PM
    • Replies: 0
    • Views: 148
    03-31-16, 10:49 PM Go to last post
  13. HT4100 A/C bypass diagram

    Started by Datboisheed803‎, 02-12-16 11:14 PM
    • Replies: 2
    • Views: 273
    03-30-16, 03:33 PM Go to last post
  14. How do you convert 80's model to R134

    Started by 87allante4.9swap‎, 09-02-09 04:46 PM
    • Replies: 10
    • Views: 1,360
    03-29-16, 03:50 PM Go to last post
  15. Boosting HT4100 Performance

    Started by DrDave‎, 02-21-05 04:50 AM
    2 Pages
    1 2
    • Replies: 27
    • Views: 12,473
    03-29-16, 03:48 PM Go to last post
    • Replies: 2
    • Views: 210
    03-29-16, 02:39 AM Go to last post
    • Replies: 1
    • Views: 229
    03-21-16, 08:28 PM Go to last post
  16. Cooling fan start 4.9

    Started by Pjotr‎, 03-14-16 08:50 AM
    • Replies: 1
    • Views: 218
    03-16-16, 08:45 PM Go to last post
  17. Water Pump Inlet Repair help

    Started by Hamspiced‎, 06-17-08 12:56 AM
    • Replies: 14
    • Views: 6,317
    03-09-16, 10:27 PM Go to last post
  18. Suddenly Won't start, no Spark, 1985 Eldorado

    Started by jhcatlin‎, 02-15-08 12:18 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 7,953
    03-09-16, 11:35 AM Go to last post
  19. Torque, harmonic balancer 4,9

    Started by Pjotr‎, 03-05-16 02:59 PM
    • Replies: 3
    • Views: 264
    03-07-16, 03:04 PM Go to last post
  20. 1993 4.9 O2 sensor locations ?

    Started by Joegolden‎, 03-04-16 10:08 AM
    • Replies: 2
    • Views: 217
    03-06-16, 10:51 PM Go to last post

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