: HT4100 4.1, 4.5, 4.9



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  1. Power improvement... from a carburator?
  2. Sad Caddy's in the background.
  3. Water Pump for 89 DeVille
  4. Heatsoak and Starters. Is this a Caddy problem too or just Cadero's.
  5. ISC motor problem? '94 Deville
  6. 88 DeVille Serpentine Belt
  7. Noise in Transmission?
  8. Coolant Leak - How to find?
  9. Good care (ATF) for 4T60E
  10. 1994 Deville 4.9 fuel pressure
  11. Please help an old man. (Backfiring voodoo fleetwood)
  12. Please Help! 4.9 won't shift out of second gear.
  13. Tranny problems engaging
  14. 89 deville 4.5 tranny in 93 seville 4.9 will it work?
  15. Need help asap.I have a draeded p093, is my trans gone?
  16. Some people just don't want to listen
  17. 92 Deville Rough Idle Periodic Stallin
  18. (3 4.9 bad mpg.Can low ac refrigerint cause this?
  19. Need a good write up for cleaning Tb and EGR valve please (4.9)
  20. WOT with a high mileage 4.9?
  21. Is my transmission fluid ok or do I need to change it out?
  22. 4T60E transmission problem??
  23. Messed up my transmission
  24. Simple question, what does the HT stand for
  25. Emmissions Testing and the 4.9 and BC Canada guys in here
  26. Knocking
  27. Knock sensor on HT4100?
  28. Cold air zapping coil!
  29. Error code 29
  30. Replaced everything...stumble is worse.
  31. 1984 Eldo 4.1 Engine Color Needed
  32. frontend noise
  33. Fastchip - Does it work?
  34. Does everyone have mandrel-bent piping?
  35. What is the Factory Timing for a 93 Eldorado
  36. I want a DIC (get your mind out of the gutter) :D
  37. 4.9 in Brougham??
  38. engine change
  39. Ram Air/Cold air intake for 4.9?
  40. Underdrive pulleys?
  41. Braking Engine Jump... 1990 DeVille
  42. engine miss 4.5 ???
  43. '90 DeVille ISC motor problem SOLVED
  44. 94 Deville misses backfires & DIES! whats wrong
  45. Fuel injector problem?
  46. Can't get my 4.9 to Adjust timing
  47. Valve Lash Adjustment
  48. 95 4.9 flywheel breakage?
  49. Fuel Pump Relay
  50. Not getting enough spark
  51. Not again!!
  52. Oxygen Sensor
  53. 4.9L Fuel Economy
  54. HT 4100 - Success stories
  55. Gurgling Sound In Engine?
  56. Second generation HT4100
  57. 1984 Fleetwood Code 52 ECM memory reset problem
  58. 84 Eldorado No Start
  59. engine rev's and dies
  60. Engine revs when I turn the wheel????????
  61. throddle control
  62. something happened today with the 90 deville and i don't know what
  63. unique problem 4.9
  64. Stoneys Main Bearing Diary
  65. nees help fast please
  66. 4.9 timing is hard! Idles rough, stumble on acceleration
  67. Water Pump Leakage!!!
  68. Min air ????
  69. Help with a water pump installation!!
  70. How to replace water pump on 92 seville?
  71. Another TPS ?????
  72. 87 Deville 4.1- No fuel!!!!!
  73. horsepower for 4.9
  74. A question for the gurus
  75. Trans cooler leak!
  76. 1990 Cadillac Sedan Deville high idle
  77. new oils verses old oils
  78. Minimum IDLE SCREW adjustment
  79. Oil cooler line o-ring
  80. Is my ISC motor shot? ('90 4.5L)
  81. Help with identifying a GM Goodwrench replacement block.
  82. Where is the MAP sensor located ???? 84 Seville
  83. 89 Deville engine pinging under load when warm
  84. new isc and tps
  85. Code Triggered: E66
  86. Low oil pressure at idle
  87. 4.x starter interchange list
  88. 4.9 91' coupe suspension level
  89. 4100 timing question
  90. Where do these fuel lines run??
  91. 1990 Sedan Deville 4.5L A Few Questions
  92. Uneven idle
  93. Teardown set for friday ...
  94. Ac Compressor
  95. Is this repair worth it?
  96. How Hot is too hot, Ouchi Hottie story inside.
  97. 89 cadillac 4.5 oxygen sensors
  98. Bore spacing
  99. 87 Deville NO FUEL!!!!
  100. FWD HT4100 air pump pupose?
  101. pinhole in block, leaks coolant, what should I do?
  102. 4.9 Just started running rough at idle
  103. Repair cost too high?
  104. 1990 Cadillac Sedan DeVille - Idling Too High
  105. HT4100 valve train pics
  106. Thermosat Question
  107. Am I stuck having to use an 80 series muffler?
  108. Strange COOLANT SENSOR readings--And engine cuts out while driving!!!
  109. water pump
  110. Oil Pan Gasket replacement on a 4.5L
  111. Error Code E41 Camshaft Position Sensor
  112. 4.9 starter problems
  113. 94 deville runs rough at cold start
  114. So Even After $700 dollars it still leaks!
  115. Swap ?'s
  116. Emission test failure
  117. How do I get my 4.5L to coast down to the "70 mpg" benchmark?
  118. A question about the Rotella Motor Oil
  119. Pls Help 4.9 ac compressor froze
  120. Deville shakes violently .. Please help!
  121. 1993 Deville ODB Codes Tripped, Idle Motor
  122. EGR valve replacement fixed the knocking problem!
  123. water pump leaking after i change it
  124. How to enter override E.5.3 on a '90 DeVille
  125. Hose question & error code 30 and 34
  126. 87 Deville Intake
  127. 4.9 intake manifold
  128. Feels like mis-fire. 85 fleetwood 4.1
  129. Engine replacement on an 88 Coupe
  130. fuel pump?????
  131. wot's and front oil seal
  132. oil pan gaskets
  133. emissions failed
  134. Crossover pipe
  135. I got into my diagnostics w/o a clue
  136. Code P039 Current?
  137. error code
  138. Pump thingy :/ 4.1 HT
  139. Programers???
  140. first service on my 89 deville
  141. stumbling, hesitation under load only
  142. 4.9 acceleration? ? ?
  143. Head or Intake?
  144. Are 1990 Throttle bodies obsolete?
  145. 91 DeVille Stalls Repeatedly
  146. Engine Soon EGR code
  147. Motor mounts/CV Joint
  148. Motor mounts/CV Joint
  149. Motor mounts/CV Joint
  150. Deville Acclerating
  151. need help
  152. i need help
  153. 4.5 to 4.9?
  154. HT4100 MSD IGNITON, should I ?
  155. Cooling Pipe Crack
  156. HT4100 Question
  157. 4.9l bolt on mods??
  158. I hate this car.
  159. Stumbling, hesitation, backfiring 89 Deville 4.5
  160. Distributor cap wiring help!!! 4.5 litre 89 deville
  161. HT4100 vacuum pump
  162. Yet another head gasket question
  163. Fuel injection question
  164. Fuel tank baffles or pump?
  165. 88 Coupe Deville Intake Manifold or Head gasket
  166. Help required !!
  167. Crazy Cadillacs
  168. This is a weird one
  169. Ok Guys, So what parts break? Engine Wise.
  170. 91 deville runs a little hot
  171. Fuel Pump Revisited
  172. 4.9 knocking
  173. WTF? Why won't this thing just blow up...
  174. 95 deville idle problem...2
  175. Deville 4.1 fwd rear main oil seal leak :(
  176. water pumps
  177. Nasty squeal - water pump?
  178. what EXACTLY do I need...?!
  179. 1988 Cadillac Coupe Deville Head Gasket
  180. Thermostat housing torque specs
  181. Engine compartment revisions!
  182. 1990 fleetwood engine miss please help
  183. I think I need a distributor 89 Deville 4.5
  184. A blog for Caddy fans
  185. MGB 4.5 project
  186. E52 code
  187. spark wires cover - removal help
  188. 1990 deville 4.5 won't even turn over
  189. water pump replacement
  190. Wheel Bearing installation - help....
  191. Remeber where those vac lines go.....
  192. E Codes on my 4.5 HELP
  193. E39 and E48 codes could I get some advice?
  194. Can anything go wrong/Flushing coolant?
  195. Another way to pull codes?
  196. Camshaft lifter questions
  197. exhaust manifold
  198. 4.5L ECM inputs
  199. Why I hate NTK Oxy Sensors from Now ON.
  200. Coolant pellets/conditoner
  201. Prob with 86 deville sedan with 4.9L *HELP*
  202. Ported vacuum switch--supposed to have a wire connected to it?
  203. 4.9L Aluminum Head project?
  204. Stoneage_caddy I had my car's fuel preasure checked today,have a couple of questions
  205. Anyone running an Auto meter Air/Fuel Ratio meter.
  206. What O2 sensor(s) are you using.
  207. antifreeze for my 85 fleetwoods ht4100
  208. Antifreeze for my HT4100
  209. 1989 Eldorado Biarritz MPG
  210. 1991 deville engine dies when coasting
  211. The Homemade 5 Liter PFI Project .....
  212. 85 seville valve lifters
  213. Blown 4.1 ht in 83 eldorado ?? how to tell ?
  214. Bogging problem
  215. Throttle body problem, help please
  216. I knew I saw it someplace, now where did it go, no not my sanity but close?
  217. 4.5......which sensor is bad?
  218. 4.9 bearing part number or TSB?
  219. Help with HT4100 water pump
  220. which is the better motor
  221. Nitrous Question
  222. 1995 DeVille Idle Fluctuation
  223. issues w/ back pressure?!?
  224. Well the pump is on, but my serpentine belt...what?
  225. 83 Sedan Deville 4100
  226. Its an Invasion 4.9, 5spd Stick Fiero
  227. why I love my 4.5...
  228. 1985 deville coolant and heater core questions.
  229. New member here, and I need some '93 Deville help (water pump installation)
  230. 1990 Allante Bosch fuel injectors/FiveOMotorsports
  231. Cleaning '90 EGR 4.5
  232. Groll Polluter FIXED??????????????????
  233. Where does this fuel line run?
  234. 88 Deville.Tensioner Pulley.
  235. 85 4100 is running rough and hesitating
  236. car will not go past 35mph 82 with a 4.1
  237. Does anyone have a picture or info on the Negative block ground?
  238. EGR Cleaning
  239. Cheap quality Rebuilt transmissions
  240. 4.5 Fast Idle problem
  241. I need a no Yo-Yo shift-kit immediately!! '84 RWD DeVille
  242. 93 Runs rough & loud when wet
  243. Spark Plug Replacement
  244. Fuel Injector Compatiblity
  245. Oil pan gasket
  246. No Spark/ No Start Problem/ Pulling what hair I have left out!
  247. oil change
  248. Accel fuel injectors
  249. Alldata (autozone)????????????????????
  250. A/C Compressor