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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. high fuel consumption..?
  2. 4.9 issue...
  3. Drive belt routing for 4.9L ???
  4. 92 STS Electrical Short or Drain
  5. where to buy mounting bracket for PS pump?
  6. 1993 Sedan Deville Transmission Swap
  7. rpm question
  8. Code 26 & 41 '91 4.9
  9. Question re: engine swap for 85 FW coupe RWD
  10. 1993 Cadillac DeVille 4.9L Distributor Shot
  11. Fuel pump and FPR recommendations?
  12. Could bad motor mounts cause stumbling on light acceleration
  13. Judgement Call - No Heat 93 Deville
  14. Motor is very clean in my 4.9
  15. Cold Air Intake/Exhaust
  16. 84 eldo. antena
  17. Symptoms of faulty distributor pick up coil
  18. I finally switched from dexicool
  19. Misfire at idle and sumble under acceleration 93 4.9
  20. Refilling colant reservoir every 2 weeks, misfire at idle
  21. 4.9. Overheating (long post)
  22. 4.9 Pictures and sound clip!
  23. 84 deville 4.1 starting prob's help please
  24. 90 Seville Dies Suddenly....
  25. when should timing chain be replaced on 93 deville 4.9
  26. Motor Mount Replacement
  27. No heat at 90 degrees on climate control 93 caddy
  28. 4.1 V8 PUlleys!
  29. 93 deville sits very low in rear time for shocks and coil spring?
  30. Adding NITROUS to a 4.5
  31. Preventive maintenance ('90 with 28k miles)
  32. 4.1 Issues with 85 Eldorado -- Can you help?
  33. Best oil Mobil 1 High mileage for 93 deville 4.9 with 102,000 miles
  34. PLEASE HELP 93 DEVILLE 4.9 Stumble under light acceleration
  35. 4.9 What's the best antifreeze to use?
  36. 93 deville surging
  37. 88 ELDO new r134 Failed Twice??
  38. How reliable will my 4.9 be?
  39. Blower fan ideas wanted
  40. 90 deville front cover gasket failure
  41. New Owner with '86 Fleetwood Seventy Five Limo
  42. 4.9 Coolant overfill reservoir not draining into radiator when cold
  43. 1992 Seville 4.9 Liter Removal
  44. ht 4100 to sbc 350 motor mount pad location HELP!
  45. Brakes
  46. 93 deville oil lev
  47. Confused about seal tabs
  48. 84 eldo-4100HT
  49. HT4100 Care and Upkeep
  50. tranny sounds
  51. oil pump again
  52. Mufflers???
  53. 4.9 How long will it last?
  54. 4.5 Reliability
  55. Sawping Out a 4.9
  56. How do you convert 80's model to R134
  57. Have you used sea foam?
  58. distributor wrench
  59. 84 eldo-4100HT
  60. Coolant.
  61. 84 Eldorado Transmission Problems
  62. 1985 Eldorado 4100 engine swap
  63. Da Capts Back with his 4.9 Fiero lots of updates
  64. here we go again, A/C
  65. 84 eldo trouble
  66. help
  67. fuel meter cover gasket...
  68. Makes no sense...
  69. car stutters intermittently under med/heavy acceleration
  70. Missing Antifreeze
  71. Severe Coolant Leak 4.9
  72. peformance chips
  73. 4.9 Bosch GenIII Injector - ??Integrator, Block Learn, x-count, p.w. values??????
  74. won't idle
  75. New code?
  76. Caddy V-8 history
  77. voltage regulator...?
  78. 4.5 running rough at start -- tune up????
  79. e.g.r. valve
  80. 94 Deville Help!!
  81. map sensor
  82. 4.9 aeromotive afpr won't fit!! Help Mr. Illumna
  83. 4.9 throttle body description
  84. Emission test failed
  85. error code 20
  86. break line
  87. 1985 Eldo Gas Leaking out of the Charcoal Can
  88. Distributor Gear Sheared Again...Help!
  89. Climate control Problem???
  90. 1985 Deville Coolant Leak
  91. engine popping
  92. 91 Coupe replaced injectors now blowing smoke
  93. 1995 Deville Hi Performance Ideas anybody????
  94. 4100 vacuum diagram
  95. 4.1 belt tensioner
  96. HT 4.X base timing question
  97. 2005 4.1 PCV Valve
  98. 1985 DeVille Collant Temp Fan Light
  99. new to me 92 sdv,need some help
  100. just wondering
  101. 87 Eldo Cash for Clunker: Heresy?
  102. sudden engine probs
  103. brand new problem
  104. 94 4.9 Distributor question
  105. Plastic Radiator Side Tanks
  106. How to check cat. converter?
  107. 94 Deville 4.9 where is the governor
  108. 92 Eldo problem
  109. Cruise control gone 4.1 87'seville
  110. 94 Sedan Deville A/C Question
  111. fuel injectors interchange?
  112. ht4100 giving me problems
  113. 4.1L tune up and oil on manifold.
  114. Need help on a '90 Cadillac Fleetwood FWD
  115. 91 deville service engine soon
  116. DIN radio in '92 Eldorado
  117. Your best 4.X MPG?
  118. 1991 4.9
  119. 90 SDV Repeated E22 TPS Code
  120. silly question
  121. you helped me last time (weird fuel pump)
  122. 90 SDV Repeated E22 TPS Code
  123. 4100 engine change. Need input.
  124. egnine oil cooler hose assemblies
  125. 92 4.9 starter replacement
  126. How many miles?
  127. water pump wrestling
  128. Head gasket change
  129. Error code 34 on 83 deville
  130. Advanced Timing
  131. gearbox oil..?
  132. Is gas safe
  133. Using a laptop for real-time OBD
  134. '94 4.9 rough running
  135. 4.9 litre engine firing order
  136. 1986 Eldorado HT4100: No Start-No Codes
  137. 1986 Eldorado HT4100
  138. '91 Deville 4.9L surging
  139. 94 4.9L will not start. Need help
  140. Idling Down rough?
  141. 86 Eldorado Fuel Pump
  142. 91 fleewood won't start code31
  143. Did I blow head gasket on 93 deville?? Please Help!
  144. Vaccum Line Problem?
  145. Replacing a blower motor - what's the secret?
  146. oil pump driveshaft is loose???
  147. 1984 Cadillac Eldorado (my topless baby)
  148. Hard starts when hot?
  149. oil pressure gauge installation
  150. couple of questions regarding oil pump
  151. HT4100 Cooling water doesn't circulate (87' Seville)
  152. removing oil pan on RWD 4.1
  153. Turbo 4.1 Allante
  154. radiator caps with zinc anode
  155. What a mess!!!
  156. High Side AC Hose Information Needed
  157. Squeeling betty
  158. 92 deville no acceleration when hot
  159. Where is the PCV valve on the 4.9L?
  160. Performance?
  161. 93 Seville 4.9 4t60E
  162. Vacuum Line Routing Egr Solenoid & Regulator
  163. Bad CTS?? (coolant senor)
  164. Name this tube! 90 DeVille
  165. 4.5 Fuel Injector Issues
  166. HT4100:major oil leak
  167. What engine/trans appear in various Cadillacs?
  168. FWD Engine Removal
  169. Coolant Change Question
  170. Stripped4.9 headbolt
  171. Fooling the Inlet Air Temp (IAT) sensor?
  172. exhaust manifold installation question
  173. PCM FI Driver Damage ? (Re-visited)
  174. 4.9L Main Bearing Thump
  175. 1993 4.9 rough at low RPM
  176. ht4100 issues
  177. PCM FI Driver Damage ?
  178. DeVille 4.9 Throttle body spacer
  179. Throttle body spacer
  180. Hot exhaust
  181. E24?
  182. 4.9 Water Pump....OR ?
  183. Stalling and Surging--Need help
  184. Relocate the oil filter on your 4.9
  185. SSS light on?
  186. 1985 Eldorado Engine Stumble & Surge
  187. won't go in gear
  188. used oil cooler lines?
  189. Chirping engine at idle
  190. 1993 Deville 4.9 sumble at iddle.
  191. Coolant "tabs" -- yes or no
  192. '90 DeVille Fuel Sending Unit Problem??
  193. Where to install Prestone flush fitting?
  194. 95 Deville AC compressor noisy
  195. 368 to 4.1 swap 1980 Fleetwood Brougham
  196. Procedure for flushing the cooling system (1990 4.5)
  197. F40 & F49 ?'s
  198. ISC part#
  199. I got a GREAT deal, I think!
  200. I wanna drive my Cadi
  201. Coolant Fan Problems
  202. Fuel injector problem
  203. 95 4.9 deville no spark???
  204. Current drain
  205. radiator/cooling system suggestions
  206. Stump the experts!
  207. no spark
  208. Why Do Some 4.x Engines get 26+MPG, Others <18 MPG Highway
  209. 1991 Cadillac Deville Runs Rough Weak Spark HELP
  210. Thermostatic Air Cleaner (THERMAC) location?
  211. Set timing mode problem!!!!! Please help!
  212. possible to fix myself?
  213. Best strut/axle solution for a '90 DeVille?
  214. 4.1 engine knock
  215. 1995 Deville 4.9 lower cooling hose question
  216. HT4100 Noise Just Started Today
  217. 1989 Seville fan comes cycles on and off when ignition is off
  218. 2000 Seville misfire. new to cadillac
  219. 1995 4.9 Misfiring at WOT
  220. Thermac?
  221. How long will a 4.5 DeVille last?
  222. Intermittent starting.
  223. 92 Deville 4.9 governed?
  224. ISC trouble! Help!
  225. need some help with my new pita
  226. EGR problem or ????
  227. Where is the Cruise control's fuse
  228. 95 devile ignition coil install help!!!
  229. would this work as a replacement for the 4.9L transmission fluid cooler?
  230. 1990 fleetwood code troubles please help!!
  231. What's the difference between ignition modules?
  232. Very strange engine problem 4.9L =HELP=
  233. 92 Deville 4.9 miss at idle
  234. 92 Deville blown headgasket or intake manifold?
  235. 1995 devile "service engine soon" light comes out , need help
  236. 91 Sedan DeVille Stall
  237. 1985 DeVille allternator wire (brown)
  238. 88 DeVille ELC not functioning
  239. 1988 DeVille Motor Mount Help
  240. heater hoses, any tips how to get these out?
  241. strut/axle/transmisiion problem
  242. Power Steering Woes
  243. flushing radiator fluid
  244. Break Release?
  245. '83 Eldorado with HT4100 V8, Rebuild or Replace?
  246. 89 coup deville coolant leak
  247. removeing crankshaft pulley bolt
  248. Back to my coolant flow problems
  249. help needed "no charge" light 83 eldorado 4.1
  250. Quick, Simple Question.