: HT4100 4.1, 4.5, 4.9



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