: HT4100 4.1, 4.5, 4.9



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  1. 1986 cadillac Stalling up hills, need help ASAP
  2. Case of the Evil Tranny
  3. Question when torquing headbolts 4.9L
  4. Synthetic oil no no in 4100
  5. New brain wracking symptom...
  6. For those of you with coolant loss issues.
  7. '93 Eldorado, 4.9L - Bad Fuel Pump?
  8. 4.1 Spun a cam bearing,
  9. C bieng displayed
  10. Is this engine rebuildable?
  11. Flowmaster Exhaust for a 4.9 Deville
  12. A/C Compressor Belt Bypass - 89 Deville 4.5
  13. all 4100's interchangable?
  14. car surges badly when stopping
  15. Blown Head gasket
  16. RPO Code of the 90 4.5L V8?
  17. 4.9 stalls
  18. Choke?
  19. New Member Introduction
  20. Allante HT4100
  21. 4100 Book
  22. replacement fuel injectors
  23. how hard is it to drop the oil pan
  24. HT4100 Recommended Oil Viscosity
  25. Tuning for E10 gasoline
  26. 4.9l oil leak
  27. Poor gas mileage/Sensors, please help a bit!
  28. HT4100 PCV valve, location?
  29. Can fuel injector effect the map sensor and how it function
  30. Losing coolant when the heat is turned on.
  31. 4.9L 1995 deville car ran out of gas but wont start
  32. VIDEO of HT4100 WOT
  33. Radiator Drain Plug
  34. 86-87 Seville, Eldorado 4.9L Swap
  35. Water Pump on an '85 fleetwood
  36. engine id
  37. 4.9 firing order???
  38. Won't start when hot (intermittent)
  39. 92 Deville losing power after turning a corner
  40. 76 Eldo 500 FI Problems
  41. swap 4.1 to a 4.5 or 4.9 in 85 Seville?
  42. swap 4.1 to a 4.5 or 49 in 85 Seville?
  43. More HT4100 Tips
  44. engine knock in my 1994 sedan deville 4.9L
  45. Well, i raced 3 cars in one night with my 4.1
  46. No start, at operating temp, Flooding on restart
  47. Help Ecm/PCM Questions
  48. New Addition to the Family--85 Sedan Deville
  49. Code Analyzer
  50. slight hesitation at cold low-gear
  51. HT4100 chosen as one of the worst engines of all time
  52. Valves too far in advance or too far retarded?
  53. 1992 Cadillac STS 4.9L Issues
  54. Decking out my 4.9
  55. '93 Eldorado 4.9L - P012 & P053 Codes
  56. Urgent Help W/engine
  57. Code e048 what's the trigger?
  58. which O2 sensor for 85 DeVille/HT4100
  59. 4.9 Code 41 Saga Continues!!!
  60. 83 fleetwood 4100
  61. Huge Problem HELP !!!
  62. Cam sensor 4.9
  63. 4100 Newbie needs help!
  64. HT4100 "STOP ENGINE-OIL PRESS" light flickering
  65. Interesting 4.9 symptom, need ideas
  66. Help wth tps (Throttle Position Sensor) problem/ Or just removing Throttle Body
  67. Injector Trouble 4.9
  68. Crank pulley wont spin...
  69. She runs!
  70. 84 Seville - low speed hesitation
  71. How long will it last?
  72. 4.5 to 4.9
  73. 85 Seville 4.1 Knocking?
  74. poor gas milage
  75. Outside temp sensor location---4.9 litre.
  76. My Car is Fixed!!! New Camshaft and Lifters
  77. Water pumps...Generally speaking.
  78. NOISEY cold start ups with the pulleys, only to quiet down when warm.
  79. 93 deville 4.9 noisey cold pulleys, quiet when warm. whats going out?
  80. My speedometer is WAY off, and has problems in park
  81. 91 deville Starter enable relay
  82. gas issue
  83. '88 DeVille EXTREME ISC problems
  84. 92 STS - Stalls anywhere but the highway.
  85. 93 Eldawg Stalls while driving but drives great
  86. EGR System Question
  87. 1987 Cadillac Deville No Fuel Preasure Im lost
  88. ECM questions
  89. Bosch 19# Injectors
  90. I Lost First Gear, Car barely moves with throttle!
  91. 83 Deville Performance?
  92. would an oil stabilizer help with burning
  93. OBD1 Codes
  94. HT4100 Brand New
  95. Help! 1983 Seville with HT-4100 FWD, need ideas for a swap-out?
  96. 85 Fleetwood FWD Won't Start! Help!
  97. Any good 4.x mechanics in the Detroit area?
  98. Water Pump Removal
  99. 1985 4.1L Distibutor Drive Gear for oil pump
  100. 6.0L? say what?
  101. '91 4.9 swap into a rear drive application?
  102. 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start
  103. Possible Transmission Problem when shifting from park
  104. Water Pump - Snapped Bolt
  105. replacing camshaft bearings?
  106. 85 Deville 4.1L Oil problems.
  107. Won't Start After Driving
  108. need help concerning tune up
  109. should I replace the catalytic converter
  110. 1990 deville shifting problem
  111. TBI injectors
  112. Flat cam or bad lifter?
  113. Code E15???????
  114. flickering Service Soon and no codes...
  115. 4.1 Engine: Sensor Above #8 Spark Plug?
  116. how many mods do you all know about?
  117. high output alternator
  118. ISC RPM Out Of Range
  119. Non GM parts=sick Cadillac??
  120. 4.9 Deville Concours driving terrible again!
  121. Torque converter lock up solenoid, Where?
  122. Engine Swap
  123. 85 Eldo HT 4100 ISC/TPS
  124. 4.5 spark plugs
  125. 4100 engine temp??
  126. Weird 4.9l issues
  127. Finally Solved 4.1 Hesitation: Coil & Plug Wires
  128. Need help with 85 Eldo HT4100 Tuneup
  129. 91 Fleetwood injector impedence?
  130. How do I access the internal codes and what are the normal parameters for a '92 4.9?
  131. SERVICE SOON telltale light!!
  132. Cadillac 4.5L PFI and 4.9L PFI IAT?
  133. my 4100--what would you do
  134. Another BIG 4.x Engine Tip--Especially for 4.1 Owners
  135. what is that god awful smell
  136. '92 Deville 4.9 runs great at startup, runs like crap when hot
  137. e44 o2 error
  138. 4.1 Sputters and pops
  139. Tips on swapping HT4100 for 500
  140. Coolant Temp Light = Sensor?
  141. Need Tps Help
  142. 4.9l Starter Connection Problem
  143. 91 Deville 4.9l No Start Issue
  144. 4.9 stalling problem,and allante question
  145. Conflicting torque information
  146. Replaced Water Pump on 89 4.5 Still leaking
  147. 4100 seville engine swap help needed
  148. 4.1 to 4.9.... RWD?
  149. Blower motor not operating
  150. Any great 4.9 mods?
  151. Remanufactured HT4100 - 10K and now oil in radiator/leak
  152. HT4100 Running BAD when warm.
  153. EGR stack tubes?????
  154. HT4100 Backfires
  155. Checked your A.I.R. system filter lately?
  156. 1990 Deville PRNDL problem
  157. 1990 Deville running poorly.
  158. Thanks for the muffler info
  159. Fuel/exhaust smell seems too strong...dangerous?
  160. 4.9ltr Northstar performance?
  161. anyone know how to remove the crankshaft pully 1990 deville 4.5
  162. 1994 Deville Running Rough
  163. What does this code mean?
  164. Fuse Popping on AC Clutch
  165. 93 Seville 4.9 rough idle, slow response, P041 code
  166. 1985 Eldorado Engine Died! help!
  167. A 4.X Water Pump Story - Not for the Faint of Heart
  168. service vehicle soon is on my dash
  169. Intake gaskets leaking...common problem on the 4.9?
  170. newbie need help
  171. 4.9 Pinging
  172. Stumbling on the on ramps 4.9
  173. Advice/Help Please -- Goodyear Gave Up
  174. 4.9L idle issues... no power.. etc.. TPS?
  175. 4.9 Engine Oil Capacity - 92 Seville
  176. Eldorado Driveability
  177. New member planning mods to 90 STS
  178. 4.5L TBI whistling
  179. 4.9L 1991 Seville driving me crazy - won't start
  180. Fuel Data Center Answers
  181. PCV valve location on 4.9 litre.
  182. HT4100 Driveability Question/Problem
  183. Replacing water pump on '87 4100 - tips?
  184. Plug Wire Order-87 Ht4100
  185. intermittent miss and other weird happenings
  186. 4.5 Cooling System Woes...
  187. HT4100 SYSTEM PROBLEM E047 and B334
  188. Is lifter tick normal on a 4.9?
  189. Coolant and Supplement Change Intervals
  190. 4.1 v8 injector resistance
  191. OIL cooler lines leaking
  192. engine oil
  193. Need help
  194. Need a little help
  195. No Spark
  196. Normal??
  197. Coolant Questions
  198. Another tip for 4.x car owners
  199. Trans Fluid Capacity, '93 Deville, 4.9
  200. dumb question, anyone know where the pcv is on a 4.9?
  201. 4.9 hesitates on highway
  202. How many miles can you expect out of a 4.9 engine and transmission?
  203. 4.9 Exhaust Note
  204. 4.9 Will Not Idle Below 2500rpm!
  205. Engine miss.......AGAIN
  206. Ht4100 V8
  207. Need transmission advice, please!
  208. Not Sure What Engine I have
  209. Turbo Muffler on a 4.9
  210. Premium Fuel in the 4.9?
  211. Ht4100
  212. HT4100 v8 frd eldorado
  213. Alternator issues
  214. HT4100 Hesitation Advice
  215. A/C Recharge
  216. Anyone change a starter on a FWD 4100?
  217. ac problems
  218. 1991 Seville
  219. 1985 Eldorado thinks it a diesel?
  220. 4.9 Problems at Wide Open Throttle
  221. Eldorado and the 4.1 engine ... ????
  222. HT 4100: Avoid at all costs????? Help!
  223. Changed PCV Valve at 98k Miles
  224. Engine Noise
  225. Speed Limiter
  226. Starter/voltage problem...
  227. engine swaps - 4500, 4900, 4100 engines
  228. Service Engine Light
  229. tachometer [jumps] 4.9 Seville
  230. boost HP on a 4.9 in my 1992 seville
  231. 83 Coupe Deville hard code 33 problems
  232. 4.9 shudder when at idle
  233. Possible injector leaks?
  234. Out of no where, my 92 Eldo did not start today.
  235. HT4100 Engine 250V8
  236. Help with and '89 Deville w/4.5L
  237. Tune-up questions, spark plugs
  238. Mystery Grind in Transmission, Engine, Where?
  239. 85 Deville 4100 Driveability
  240. I dread turning this car off!
  241. 4.9 instead of 4.5??
  242. 88 cdv
  243. Should I buy a car with a 4.1 L Engine?
  244. Ok ive given up on this engine.
  245. Oil test shows coolant contamination in 4.9!
  246. Need 2 things please...
  247. honest mpg of 4.9 city driving survey
  248. transmission bump on downshift
  249. ISC motor 1993 Deville
  250. Think i messed something up