: HT4100 4.1, 4.5, 4.9



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  1. 4.9 water pump
  2. Broken Upper Radiator Hose Connector
  3. 1994 Sedan Deville questions...
  4. Piston 6 hits sparkplug - Bad timing
  5. Coupe Deville 4.5 Rough Running
  6. new and need some help please!!!!!
  7. What should I do, buy or walk? 89 Coupe Deville
  8. E20 - Open Fuel Pump Circut Feedback Signal
  9. 4.1 Running Bad Again
  10. 4.5 Allante Intake on a 4.9 Eldorado
  11. heat issues!!!!
  12. Need Help ASAP!!!!!!
  13. Lound thump when shutting off engine, then no restart
  14. 4.9 Oil Filter ??
  15. 4.9 and spark knock
  16. I really need help, please!
  17. will my 4.9 fit?
  18. I'm going to try the 4.1->4.9 conversion
  19. 1986 cadillac Stalling up hills, need help ASAP
  20. Case of the Evil Tranny
  21. Question when torquing headbolts 4.9L
  22. Synthetic oil no no in 4100
  23. New brain wracking symptom...
  24. For those of you with coolant loss issues.
  25. '93 Eldorado, 4.9L - Bad Fuel Pump?
  26. 4.1 Spun a cam bearing,
  27. C bieng displayed
  28. Is this engine rebuildable?
  29. Flowmaster Exhaust for a 4.9 Deville
  30. A/C Compressor Belt Bypass - 89 Deville 4.5
  31. all 4100's interchangable?
  32. car surges badly when stopping
  33. Blown Head gasket
  34. RPO Code of the 90 4.5L V8?
  35. 4.9 stalls
  36. Choke?
  37. New Member Introduction
  38. Allante HT4100
  39. 4100 Book
  40. replacement fuel injectors
  41. how hard is it to drop the oil pan
  42. HT4100 Recommended Oil Viscosity
  43. Tuning for E10 gasoline
  44. 4.9l oil leak
  45. Poor gas mileage/Sensors, please help a bit!
  46. HT4100 PCV valve, location?
  47. Can fuel injector effect the map sensor and how it function
  48. Losing coolant when the heat is turned on.
  49. 4.9L 1995 deville car ran out of gas but wont start
  50. VIDEO of HT4100 WOT
  51. Radiator Drain Plug
  52. 86-87 Seville, Eldorado 4.9L Swap
  53. Water Pump on an '85 fleetwood
  54. engine id
  55. 4.9 firing order???
  56. Won't start when hot (intermittent)
  57. 92 Deville losing power after turning a corner
  58. 76 Eldo 500 FI Problems
  59. swap 4.1 to a 4.5 or 4.9 in 85 Seville?
  60. swap 4.1 to a 4.5 or 49 in 85 Seville?
  61. More HT4100 Tips
  62. engine knock in my 1994 sedan deville 4.9L
  63. Well, i raced 3 cars in one night with my 4.1
  64. No start, at operating temp, Flooding on restart
  65. Help Ecm/PCM Questions
  66. New Addition to the Family--85 Sedan Deville
  67. Code Analyzer
  68. slight hesitation at cold low-gear
  69. HT4100 chosen as one of the worst engines of all time
  70. Valves too far in advance or too far retarded?
  71. 1992 Cadillac STS 4.9L Issues
  72. Decking out my 4.9
  73. '93 Eldorado 4.9L - P012 & P053 Codes
  74. Urgent Help W/engine
  75. Code e048 what's the trigger?
  76. which O2 sensor for 85 DeVille/HT4100
  77. 4.9 Code 41 Saga Continues!!!
  78. 83 fleetwood 4100
  79. Huge Problem HELP !!!
  80. Cam sensor 4.9
  81. 4100 Newbie needs help!
  82. HT4100 "STOP ENGINE-OIL PRESS" light flickering
  83. Interesting 4.9 symptom, need ideas
  84. Help wth tps (Throttle Position Sensor) problem/ Or just removing Throttle Body
  85. Injector Trouble 4.9
  86. Crank pulley wont spin...
  87. She runs!
  88. 84 Seville - low speed hesitation
  89. How long will it last?
  90. 4.5 to 4.9
  91. 85 Seville 4.1 Knocking?
  92. poor gas milage
  93. Outside temp sensor location---4.9 litre.
  94. My Car is Fixed!!! New Camshaft and Lifters
  95. Water pumps...Generally speaking.
  96. NOISEY cold start ups with the pulleys, only to quiet down when warm.
  97. 93 deville 4.9 noisey cold pulleys, quiet when warm. whats going out?
  98. My speedometer is WAY off, and has problems in park
  99. 91 deville Starter enable relay
  100. gas issue
  101. '88 DeVille EXTREME ISC problems
  102. 92 STS - Stalls anywhere but the highway.
  103. 93 Eldawg Stalls while driving but drives great
  104. EGR System Question
  105. 1987 Cadillac Deville No Fuel Preasure Im lost
  106. ECM questions
  107. Bosch 19# Injectors
  108. I Lost First Gear, Car barely moves with throttle!
  109. 83 Deville Performance?
  110. would an oil stabilizer help with burning
  111. OBD1 Codes
  112. HT4100 Brand New
  113. Help! 1983 Seville with HT-4100 FWD, need ideas for a swap-out?
  114. 85 Fleetwood FWD Won't Start! Help!
  115. Any good 4.x mechanics in the Detroit area?
  116. Water Pump Removal
  117. 1985 4.1L Distibutor Drive Gear for oil pump
  118. 6.0L? say what?
  119. '91 4.9 swap into a rear drive application?
  120. 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start
  121. Possible Transmission Problem when shifting from park
  122. Water Pump - Snapped Bolt
  123. replacing camshaft bearings?
  124. 85 Deville 4.1L Oil problems.
  125. Won't Start After Driving
  126. need help concerning tune up
  127. should I replace the catalytic converter
  128. 1990 deville shifting problem
  129. TBI injectors
  130. Flat cam or bad lifter?
  131. Code E15???????
  132. flickering Service Soon and no codes...
  133. 4.1 Engine: Sensor Above #8 Spark Plug?
  134. how many mods do you all know about?
  135. high output alternator
  136. ISC RPM Out Of Range
  137. Non GM parts=sick Cadillac??
  138. 4.9 Deville Concours driving terrible again!
  139. Torque converter lock up solenoid, Where?
  140. Engine Swap
  141. 85 Eldo HT 4100 ISC/TPS
  142. 4.5 spark plugs
  143. 4100 engine temp??
  144. Weird 4.9l issues
  145. Finally Solved 4.1 Hesitation: Coil & Plug Wires
  146. Need help with 85 Eldo HT4100 Tuneup
  147. 91 Fleetwood injector impedence?
  148. How do I access the internal codes and what are the normal parameters for a '92 4.9?
  149. SERVICE SOON telltale light!!
  150. Cadillac 4.5L PFI and 4.9L PFI IAT?
  151. my 4100--what would you do
  152. Another BIG 4.x Engine Tip--Especially for 4.1 Owners
  153. what is that god awful smell
  154. '92 Deville 4.9 runs great at startup, runs like crap when hot
  155. e44 o2 error
  156. 4.1 Sputters and pops
  157. Tips on swapping HT4100 for 500
  158. Coolant Temp Light = Sensor?
  159. Need Tps Help
  160. 4.9l Starter Connection Problem
  161. 91 Deville 4.9l No Start Issue
  162. 4.9 stalling problem,and allante question
  163. Conflicting torque information
  164. Replaced Water Pump on 89 4.5 Still leaking
  165. 4100 seville engine swap help needed
  166. 4.1 to 4.9.... RWD?
  167. Blower motor not operating
  168. Any great 4.9 mods?
  169. Remanufactured HT4100 - 10K and now oil in radiator/leak
  170. HT4100 Running BAD when warm.
  171. EGR stack tubes?????
  172. HT4100 Backfires
  173. Checked your A.I.R. system filter lately?
  174. 1990 Deville PRNDL problem
  175. 1990 Deville running poorly.
  176. Thanks for the muffler info
  177. Fuel/exhaust smell seems too strong...dangerous?
  178. 4.9ltr Northstar performance?
  179. anyone know how to remove the crankshaft pully 1990 deville 4.5
  180. 1994 Deville Running Rough
  181. What does this code mean?
  182. Fuse Popping on AC Clutch
  183. 93 Seville 4.9 rough idle, slow response, P041 code
  184. 1985 Eldorado Engine Died! help!
  185. A 4.X Water Pump Story - Not for the Faint of Heart
  186. service vehicle soon is on my dash
  187. Intake gaskets leaking...common problem on the 4.9?
  188. newbie need help
  189. 4.9 Pinging
  190. Stumbling on the on ramps 4.9
  191. Advice/Help Please -- Goodyear Gave Up
  192. 4.9L idle issues... no power.. etc.. TPS?
  193. 4.9 Engine Oil Capacity - 92 Seville
  194. Eldorado Driveability
  195. New member planning mods to 90 STS
  196. 4.5L TBI whistling
  197. 4.9L 1991 Seville driving me crazy - won't start
  198. Fuel Data Center Answers
  199. PCV valve location on 4.9 litre.
  200. HT4100 Driveability Question/Problem
  201. Replacing water pump on '87 4100 - tips?
  202. Plug Wire Order-87 Ht4100
  203. intermittent miss and other weird happenings
  204. 4.5 Cooling System Woes...
  205. HT4100 SYSTEM PROBLEM E047 and B334
  206. Is lifter tick normal on a 4.9?
  207. Coolant and Supplement Change Intervals
  208. 4.1 v8 injector resistance
  209. OIL cooler lines leaking
  210. engine oil
  211. Need help
  212. Need a little help
  213. No Spark
  214. Normal??
  215. Coolant Questions
  216. Another tip for 4.x car owners
  217. Trans Fluid Capacity, '93 Deville, 4.9
  218. dumb question, anyone know where the pcv is on a 4.9?
  219. 4.9 hesitates on highway
  220. How many miles can you expect out of a 4.9 engine and transmission?
  221. 4.9 Exhaust Note
  222. 4.9 Will Not Idle Below 2500rpm!
  223. Engine miss.......AGAIN
  224. Ht4100 V8
  225. Need transmission advice, please!
  226. Not Sure What Engine I have
  227. Turbo Muffler on a 4.9
  228. Premium Fuel in the 4.9?
  229. Ht4100
  230. HT4100 v8 frd eldorado
  231. Alternator issues
  232. HT4100 Hesitation Advice
  233. A/C Recharge
  234. Anyone change a starter on a FWD 4100?
  235. ac problems
  236. 1991 Seville
  237. 1985 Eldorado thinks it a diesel?
  238. 4.9 Problems at Wide Open Throttle
  239. Eldorado and the 4.1 engine ... ????
  240. HT 4100: Avoid at all costs????? Help!
  241. Changed PCV Valve at 98k Miles
  242. Engine Noise
  243. Speed Limiter
  244. Starter/voltage problem...
  245. engine swaps - 4500, 4900, 4100 engines
  246. Service Engine Light
  247. tachometer [jumps] 4.9 Seville
  248. boost HP on a 4.9 in my 1992 seville
  249. 83 Coupe Deville hard code 33 problems
  250. 4.9 shudder when at idle