: HT4100 4.1, 4.5, 4.9



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