: HT4100 4.1, 4.5, 4.9



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  1. 4.1 Running Bad Again
  2. 4.5 Allante Intake on a 4.9 Eldorado
  3. heat issues!!!!
  4. Need Help ASAP!!!!!!
  5. Lound thump when shutting off engine, then no restart
  6. 4.9 Oil Filter ??
  7. 4.9 and spark knock
  8. I really need help, please!
  9. will my 4.9 fit?
  10. I'm going to try the 4.1->4.9 conversion
  11. 1986 cadillac Stalling up hills, need help ASAP
  12. Case of the Evil Tranny
  13. Question when torquing headbolts 4.9L
  14. Synthetic oil no no in 4100
  15. New brain wracking symptom...
  16. For those of you with coolant loss issues.
  17. '93 Eldorado, 4.9L - Bad Fuel Pump?
  18. 4.1 Spun a cam bearing,
  19. C bieng displayed
  20. Is this engine rebuildable?
  21. Flowmaster Exhaust for a 4.9 Deville
  22. A/C Compressor Belt Bypass - 89 Deville 4.5
  23. all 4100's interchangable?
  24. car surges badly when stopping
  25. Blown Head gasket
  26. RPO Code of the 90 4.5L V8?
  27. 4.9 stalls
  28. Choke?
  29. New Member Introduction
  30. Allante HT4100
  31. 4100 Book
  32. replacement fuel injectors
  33. how hard is it to drop the oil pan
  34. HT4100 Recommended Oil Viscosity
  35. Tuning for E10 gasoline
  36. 4.9l oil leak
  37. Poor gas mileage/Sensors, please help a bit!
  38. HT4100 PCV valve, location?
  39. Can fuel injector effect the map sensor and how it function
  40. Losing coolant when the heat is turned on.
  41. 4.9L 1995 deville car ran out of gas but wont start
  42. VIDEO of HT4100 WOT
  43. Radiator Drain Plug
  44. 86-87 Seville, Eldorado 4.9L Swap
  45. Water Pump on an '85 fleetwood
  46. engine id
  47. 4.9 firing order???
  48. Won't start when hot (intermittent)
  49. 92 Deville losing power after turning a corner
  50. 76 Eldo 500 FI Problems
  51. swap 4.1 to a 4.5 or 4.9 in 85 Seville?
  52. swap 4.1 to a 4.5 or 49 in 85 Seville?
  53. More HT4100 Tips
  54. engine knock in my 1994 sedan deville 4.9L
  55. Well, i raced 3 cars in one night with my 4.1
  56. No start, at operating temp, Flooding on restart
  57. Help Ecm/PCM Questions
  58. New Addition to the Family--85 Sedan Deville
  59. Code Analyzer
  60. slight hesitation at cold low-gear
  61. HT4100 chosen as one of the worst engines of all time
  62. Valves too far in advance or too far retarded?
  63. 1992 Cadillac STS 4.9L Issues
  64. Decking out my 4.9
  65. '93 Eldorado 4.9L - P012 & P053 Codes
  66. Urgent Help W/engine
  67. Code e048 what's the trigger?
  68. which O2 sensor for 85 DeVille/HT4100
  69. 4.9 Code 41 Saga Continues!!!
  70. 83 fleetwood 4100
  71. Huge Problem HELP !!!
  72. Cam sensor 4.9
  73. 4100 Newbie needs help!
  74. HT4100 "STOP ENGINE-OIL PRESS" light flickering
  75. Interesting 4.9 symptom, need ideas
  76. Help wth tps (Throttle Position Sensor) problem/ Or just removing Throttle Body
  77. Injector Trouble 4.9
  78. Crank pulley wont spin...
  79. She runs!
  80. 84 Seville - low speed hesitation
  81. How long will it last?
  82. 4.5 to 4.9
  83. 85 Seville 4.1 Knocking?
  84. poor gas milage
  85. Outside temp sensor location---4.9 litre.
  86. My Car is Fixed!!! New Camshaft and Lifters
  87. Water pumps...Generally speaking.
  88. NOISEY cold start ups with the pulleys, only to quiet down when warm.
  89. 93 deville 4.9 noisey cold pulleys, quiet when warm. whats going out?
  90. My speedometer is WAY off, and has problems in park
  91. 91 deville Starter enable relay
  92. gas issue
  93. '88 DeVille EXTREME ISC problems
  94. 92 STS - Stalls anywhere but the highway.
  95. 93 Eldawg Stalls while driving but drives great
  96. EGR System Question
  97. 1987 Cadillac Deville No Fuel Preasure Im lost
  98. ECM questions
  99. Bosch 19# Injectors
  100. I Lost First Gear, Car barely moves with throttle!
  101. 83 Deville Performance?
  102. would an oil stabilizer help with burning
  103. OBD1 Codes
  104. HT4100 Brand New
  105. Help! 1983 Seville with HT-4100 FWD, need ideas for a swap-out?
  106. 85 Fleetwood FWD Won't Start! Help!
  107. Any good 4.x mechanics in the Detroit area?
  108. Water Pump Removal
  109. 1985 4.1L Distibutor Drive Gear for oil pump
  110. 6.0L? say what?
  111. '91 4.9 swap into a rear drive application?
  112. 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start
  113. Possible Transmission Problem when shifting from park
  114. Water Pump - Snapped Bolt
  115. replacing camshaft bearings?
  116. 85 Deville 4.1L Oil problems.
  117. Won't Start After Driving
  118. need help concerning tune up
  119. should I replace the catalytic converter
  120. 1990 deville shifting problem
  121. TBI injectors
  122. Flat cam or bad lifter?
  123. Code E15???????
  124. flickering Service Soon and no codes...
  125. 4.1 Engine: Sensor Above #8 Spark Plug?
  126. how many mods do you all know about?
  127. high output alternator
  128. ISC RPM Out Of Range
  129. Non GM parts=sick Cadillac??
  130. 4.9 Deville Concours driving terrible again!
  131. Torque converter lock up solenoid, Where?
  132. Engine Swap
  133. 85 Eldo HT 4100 ISC/TPS
  134. 4.5 spark plugs
  135. 4100 engine temp??
  136. Weird 4.9l issues
  137. Finally Solved 4.1 Hesitation: Coil & Plug Wires
  138. Need help with 85 Eldo HT4100 Tuneup
  139. 91 Fleetwood injector impedence?
  140. How do I access the internal codes and what are the normal parameters for a '92 4.9?
  141. SERVICE SOON telltale light!!
  142. Cadillac 4.5L PFI and 4.9L PFI IAT?
  143. my 4100--what would you do
  144. Another BIG 4.x Engine Tip--Especially for 4.1 Owners
  145. what is that god awful smell
  146. '92 Deville 4.9 runs great at startup, runs like crap when hot
  147. e44 o2 error
  148. 4.1 Sputters and pops
  149. Tips on swapping HT4100 for 500
  150. Coolant Temp Light = Sensor?
  151. Need Tps Help
  152. 4.9l Starter Connection Problem
  153. 91 Deville 4.9l No Start Issue
  154. 4.9 stalling problem,and allante question
  155. Conflicting torque information
  156. Replaced Water Pump on 89 4.5 Still leaking
  157. 4100 seville engine swap help needed
  158. 4.1 to 4.9.... RWD?
  159. Blower motor not operating
  160. Any great 4.9 mods?
  161. Remanufactured HT4100 - 10K and now oil in radiator/leak
  162. HT4100 Running BAD when warm.
  163. EGR stack tubes?????
  164. HT4100 Backfires
  165. Checked your A.I.R. system filter lately?
  166. 1990 Deville PRNDL problem
  167. 1990 Deville running poorly.
  168. Thanks for the muffler info
  169. Fuel/exhaust smell seems too strong...dangerous?
  170. 4.9ltr Northstar performance?
  171. anyone know how to remove the crankshaft pully 1990 deville 4.5
  172. 1994 Deville Running Rough
  173. What does this code mean?
  174. Fuse Popping on AC Clutch
  175. 93 Seville 4.9 rough idle, slow response, P041 code
  176. 1985 Eldorado Engine Died! help!
  177. A 4.X Water Pump Story - Not for the Faint of Heart
  178. service vehicle soon is on my dash
  179. Intake gaskets leaking...common problem on the 4.9?
  180. newbie need help
  181. 4.9 Pinging
  182. Stumbling on the on ramps 4.9
  183. Advice/Help Please -- Goodyear Gave Up
  184. 4.9L idle issues... no power.. etc.. TPS?
  185. 4.9 Engine Oil Capacity - 92 Seville
  186. Eldorado Driveability
  187. New member planning mods to 90 STS
  188. 4.5L TBI whistling
  189. 4.9L 1991 Seville driving me crazy - won't start
  190. Fuel Data Center Answers
  191. PCV valve location on 4.9 litre.
  192. HT4100 Driveability Question/Problem
  193. Replacing water pump on '87 4100 - tips?
  194. Plug Wire Order-87 Ht4100
  195. intermittent miss and other weird happenings
  196. 4.5 Cooling System Woes...
  197. HT4100 SYSTEM PROBLEM E047 and B334
  198. Is lifter tick normal on a 4.9?
  199. Coolant and Supplement Change Intervals
  200. 4.1 v8 injector resistance
  201. OIL cooler lines leaking
  202. engine oil
  203. Need help
  204. Need a little help
  205. No Spark
  206. Normal??
  207. Coolant Questions
  208. Another tip for 4.x car owners
  209. Trans Fluid Capacity, '93 Deville, 4.9
  210. dumb question, anyone know where the pcv is on a 4.9?
  211. 4.9 hesitates on highway
  212. How many miles can you expect out of a 4.9 engine and transmission?
  213. 4.9 Exhaust Note
  214. 4.9 Will Not Idle Below 2500rpm!
  215. Engine miss.......AGAIN
  216. Ht4100 V8
  217. Need transmission advice, please!
  218. Not Sure What Engine I have
  219. Turbo Muffler on a 4.9
  220. Premium Fuel in the 4.9?
  221. Ht4100
  222. HT4100 v8 frd eldorado
  223. Alternator issues
  224. HT4100 Hesitation Advice
  225. A/C Recharge
  226. Anyone change a starter on a FWD 4100?
  227. ac problems
  228. 1991 Seville
  229. 1985 Eldorado thinks it a diesel?
  230. 4.9 Problems at Wide Open Throttle
  231. Eldorado and the 4.1 engine ... ????
  232. HT 4100: Avoid at all costs????? Help!
  233. Changed PCV Valve at 98k Miles
  234. Engine Noise
  235. Speed Limiter
  236. Starter/voltage problem...
  237. engine swaps - 4500, 4900, 4100 engines
  238. Service Engine Light
  239. tachometer [jumps] 4.9 Seville
  240. boost HP on a 4.9 in my 1992 seville
  241. 83 Coupe Deville hard code 33 problems
  242. 4.9 shudder when at idle
  243. Possible injector leaks?
  244. Out of no where, my 92 Eldo did not start today.
  245. HT4100 Engine 250V8
  246. Help with and '89 Deville w/4.5L
  247. Tune-up questions, spark plugs
  248. Mystery Grind in Transmission, Engine, Where?
  249. 85 Deville 4100 Driveability
  250. I dread turning this car off!