: HT4100 4.1, 4.5, 4.9



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  1. 4.9's torque
  2. Right the wrongs in a 4.1 (4100)
  3. 4.9 engine
  4. 4.9 liter vanity cover removal.
  5. The Mythical 4.9 performance Chip
  6. 4.5 Liter - Last chance before I need to give it up.
  7. Possible ECM problem
  8. Got mother's 1985 Fleetwood Brougham with HT4100
  9. Member 92 Seville 89 - Old Threads
  10. Water Pump Tasks ahead
  11. wont start cold
  12. egr question
  13. Problem of the day :)
  14. 2002 DTS trouble
  15. 250 or 252?
  16. 4.9 isc adjustment: Thanks Ranger
  17. 4.5 engine swap
  18. Hall Effect
  19. How do you get to the back of the FDC
  20. 4100 RWD replacement source
  21. mechanical water temp guage
  22. deck height and bore spacing
  23. 88 4.5L Running rough
  24. 90 eldo-possible tranny issue and engine issue
  25. Exhaust Muffler
  26. 4.9 litre--flat tappet engine?
  27. 4.1 to 4.5
  28. New to Throttle Body Injection?
  29. Suddenly Won't start, no Spark, 1985 Eldorado
  30. Haynes or Chiltons
  31. 4100 Updated intake gasket set
  32. '93 Eldorado, 4.9L - Partial Fire, No Start
  33. How do you clean 4.5 throttle body?
  34. oil change
  35. Crazy Coolant Temperatures
  36. Mustard like substance in radiator
  37. Help my 91 cadilliac deville 4.9
  38. Two Problems Not Starting and Stalling
  39. 4.9 water pump
  40. Broken Upper Radiator Hose Connector
  41. 1994 Sedan Deville questions...
  42. Piston 6 hits sparkplug - Bad timing
  43. Coupe Deville 4.5 Rough Running
  44. new and need some help please!!!!!
  45. What should I do, buy or walk? 89 Coupe Deville
  46. E20 - Open Fuel Pump Circut Feedback Signal
  47. 4.1 Running Bad Again
  48. 4.5 Allante Intake on a 4.9 Eldorado
  49. heat issues!!!!
  50. Need Help ASAP!!!!!!
  51. Lound thump when shutting off engine, then no restart
  52. 4.9 Oil Filter ??
  53. 4.9 and spark knock
  54. I really need help, please!
  55. will my 4.9 fit?
  56. I'm going to try the 4.1->4.9 conversion
  57. 1986 cadillac Stalling up hills, need help ASAP
  58. Case of the Evil Tranny
  59. Question when torquing headbolts 4.9L
  60. Synthetic oil no no in 4100
  61. New brain wracking symptom...
  62. For those of you with coolant loss issues.
  63. '93 Eldorado, 4.9L - Bad Fuel Pump?
  64. 4.1 Spun a cam bearing,
  65. C bieng displayed
  66. Is this engine rebuildable?
  67. Flowmaster Exhaust for a 4.9 Deville
  68. A/C Compressor Belt Bypass - 89 Deville 4.5
  69. all 4100's interchangable?
  70. car surges badly when stopping
  71. Blown Head gasket
  72. RPO Code of the 90 4.5L V8?
  73. 4.9 stalls
  74. Choke?
  75. New Member Introduction
  76. Allante HT4100
  77. 4100 Book
  78. replacement fuel injectors
  79. how hard is it to drop the oil pan
  80. HT4100 Recommended Oil Viscosity
  81. Tuning for E10 gasoline
  82. 4.9l oil leak
  83. Poor gas mileage/Sensors, please help a bit!
  84. HT4100 PCV valve, location?
  85. Can fuel injector effect the map sensor and how it function
  86. Losing coolant when the heat is turned on.
  87. 4.9L 1995 deville car ran out of gas but wont start
  88. VIDEO of HT4100 WOT
  89. Radiator Drain Plug
  90. 86-87 Seville, Eldorado 4.9L Swap
  91. Water Pump on an '85 fleetwood
  92. engine id
  93. 4.9 firing order???
  94. Won't start when hot (intermittent)
  95. 92 Deville losing power after turning a corner
  96. 76 Eldo 500 FI Problems
  97. swap 4.1 to a 4.5 or 4.9 in 85 Seville?
  98. swap 4.1 to a 4.5 or 49 in 85 Seville?
  99. More HT4100 Tips
  100. engine knock in my 1994 sedan deville 4.9L
  101. Well, i raced 3 cars in one night with my 4.1
  102. No start, at operating temp, Flooding on restart
  103. Help Ecm/PCM Questions
  104. New Addition to the Family--85 Sedan Deville
  105. Code Analyzer
  106. slight hesitation at cold low-gear
  107. HT4100 chosen as one of the worst engines of all time
  108. Valves too far in advance or too far retarded?
  109. 1992 Cadillac STS 4.9L Issues
  110. Decking out my 4.9
  111. '93 Eldorado 4.9L - P012 & P053 Codes
  112. Urgent Help W/engine
  113. Code e048 what's the trigger?
  114. which O2 sensor for 85 DeVille/HT4100
  115. 4.9 Code 41 Saga Continues!!!
  116. 83 fleetwood 4100
  117. Huge Problem HELP !!!
  118. Cam sensor 4.9
  119. 4100 Newbie needs help!
  120. HT4100 "STOP ENGINE-OIL PRESS" light flickering
  121. Interesting 4.9 symptom, need ideas
  122. Help wth tps (Throttle Position Sensor) problem/ Or just removing Throttle Body
  123. Injector Trouble 4.9
  124. Crank pulley wont spin...
  125. She runs!
  126. 84 Seville - low speed hesitation
  127. How long will it last?
  128. 4.5 to 4.9
  129. 85 Seville 4.1 Knocking?
  130. poor gas milage
  131. Outside temp sensor location---4.9 litre.
  132. My Car is Fixed!!! New Camshaft and Lifters
  133. Water pumps...Generally speaking.
  134. NOISEY cold start ups with the pulleys, only to quiet down when warm.
  135. 93 deville 4.9 noisey cold pulleys, quiet when warm. whats going out?
  136. My speedometer is WAY off, and has problems in park
  137. 91 deville Starter enable relay
  138. gas issue
  139. '88 DeVille EXTREME ISC problems
  140. 92 STS - Stalls anywhere but the highway.
  141. 93 Eldawg Stalls while driving but drives great
  142. EGR System Question
  143. 1987 Cadillac Deville No Fuel Preasure Im lost
  144. ECM questions
  145. Bosch 19# Injectors
  146. I Lost First Gear, Car barely moves with throttle!
  147. 83 Deville Performance?
  148. would an oil stabilizer help with burning
  149. OBD1 Codes
  150. HT4100 Brand New
  151. Help! 1983 Seville with HT-4100 FWD, need ideas for a swap-out?
  152. 85 Fleetwood FWD Won't Start! Help!
  153. Any good 4.x mechanics in the Detroit area?
  154. Water Pump Removal
  155. 1985 4.1L Distibutor Drive Gear for oil pump
  156. 6.0L? say what?
  157. '91 4.9 swap into a rear drive application?
  158. 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start
  159. Possible Transmission Problem when shifting from park
  160. Water Pump - Snapped Bolt
  161. replacing camshaft bearings?
  162. 85 Deville 4.1L Oil problems.
  163. Won't Start After Driving
  164. need help concerning tune up
  165. should I replace the catalytic converter
  166. 1990 deville shifting problem
  167. TBI injectors
  168. Flat cam or bad lifter?
  169. Code E15???????
  170. flickering Service Soon and no codes...
  171. 4.1 Engine: Sensor Above #8 Spark Plug?
  172. how many mods do you all know about?
  173. high output alternator
  174. ISC RPM Out Of Range
  175. Non GM parts=sick Cadillac??
  176. 4.9 Deville Concours driving terrible again!
  177. Torque converter lock up solenoid, Where?
  178. Engine Swap
  179. 85 Eldo HT 4100 ISC/TPS
  180. 4.5 spark plugs
  181. 4100 engine temp??
  182. Weird 4.9l issues
  183. Finally Solved 4.1 Hesitation: Coil & Plug Wires
  184. Need help with 85 Eldo HT4100 Tuneup
  185. 91 Fleetwood injector impedence?
  186. How do I access the internal codes and what are the normal parameters for a '92 4.9?
  187. SERVICE SOON telltale light!!
  188. Cadillac 4.5L PFI and 4.9L PFI IAT?
  189. my 4100--what would you do
  190. Another BIG 4.x Engine Tip--Especially for 4.1 Owners
  191. what is that god awful smell
  192. '92 Deville 4.9 runs great at startup, runs like crap when hot
  193. e44 o2 error
  194. 4.1 Sputters and pops
  195. Tips on swapping HT4100 for 500
  196. Coolant Temp Light = Sensor?
  197. Need Tps Help
  198. 4.9l Starter Connection Problem
  199. 91 Deville 4.9l No Start Issue
  200. 4.9 stalling problem,and allante question
  201. Conflicting torque information
  202. Replaced Water Pump on 89 4.5 Still leaking
  203. 4100 seville engine swap help needed
  204. 4.1 to 4.9.... RWD?
  205. Blower motor not operating
  206. Any great 4.9 mods?
  207. Remanufactured HT4100 - 10K and now oil in radiator/leak
  208. HT4100 Running BAD when warm.
  209. EGR stack tubes?????
  210. HT4100 Backfires
  211. Checked your A.I.R. system filter lately?
  212. 1990 Deville PRNDL problem
  213. 1990 Deville running poorly.
  214. Thanks for the muffler info
  215. Fuel/exhaust smell seems too strong...dangerous?
  216. 4.9ltr Northstar performance?
  217. anyone know how to remove the crankshaft pully 1990 deville 4.5
  218. 1994 Deville Running Rough
  219. What does this code mean?
  220. Fuse Popping on AC Clutch
  221. 93 Seville 4.9 rough idle, slow response, P041 code
  222. 1985 Eldorado Engine Died! help!
  223. A 4.X Water Pump Story - Not for the Faint of Heart
  224. service vehicle soon is on my dash
  225. Intake gaskets leaking...common problem on the 4.9?
  226. newbie need help
  227. 4.9 Pinging
  228. Stumbling on the on ramps 4.9
  229. Advice/Help Please -- Goodyear Gave Up
  230. 4.9L idle issues... no power.. etc.. TPS?
  231. 4.9 Engine Oil Capacity - 92 Seville
  232. Eldorado Driveability
  233. New member planning mods to 90 STS
  234. 4.5L TBI whistling
  235. 4.9L 1991 Seville driving me crazy - won't start
  236. Fuel Data Center Answers
  237. PCV valve location on 4.9 litre.
  238. HT4100 Driveability Question/Problem
  239. Replacing water pump on '87 4100 - tips?
  240. Plug Wire Order-87 Ht4100
  241. intermittent miss and other weird happenings
  242. 4.5 Cooling System Woes...
  243. HT4100 SYSTEM PROBLEM E047 and B334
  244. Is lifter tick normal on a 4.9?
  245. Coolant and Supplement Change Intervals
  246. 4.1 v8 injector resistance
  247. OIL cooler lines leaking
  248. engine oil
  249. Need help
  250. Need a little help