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HT4100 4.1, 4.5, 4.9

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Sticky OBD I codes for 4.x Engines
0
72K
 by DaveSmed
1984 Eldorado Biarritz (HT4100 Top End Overhaul)
12
335
 by Alex84Eldo
1992 ETC - 4.9 unstable idle
4
101
 by willx2
4.1L Engine Swap
3
144
 by jayoldschool
4.1 main bearing thump
5
1K
 by Killa ninja
1983 Cadillac Seville HT-4100 Vacuum Leak?
16
12K
 by Naija510
1984 Eldorado Biarritz (HT4100 engine pictures needed))
5
121
 by Naija510
4.9 low rpm/light throttle stumbling/bucking
14
4K
 by willx2
Ht 4100 caught fire help!!!
0
56
 by Naija510
E49 code and possible solutions.
2
26
14K
 by Rivieraman
92 Allante 4.5 returning E041 Cam sensor
6
1K
 by Byrdman
Vacuum Line Routing Egr Solenoid & Regulator
6
8K
 by MooseMoose
Cold Air Intake?
1
801
 by PhletchSRX4
1992 4.9l and the unavailable 10W30
4
437
 by jayoldschool
4.1 V8 motor oil leak
1
314
 by 1983 Fleetwood Brougham
Searching for 4.X parts...Can anyone help?
5
864
 by smokuspollutus
Coolant supplement Tabs
15
6K
 by Submariner409
Engine swaps for 1984 Fleetwood
5
455
 by Cadikid85
Misfire 93 4.9
0
255
 by CadillacCreel
Swapping HT4100 (4.1L V8) Fleetwood Brougham with a 5.7L V8
4
912
 by smokuspollutus
1988 4.1L Allante Change Spark Plugs?
1
479
 by Submariner409
HT4100 4.1, 4.5, 4.9 This forum is to discuss the newer aluminum block Cadillac engines.
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