: HT4100 4.1, 4.5, 4.9



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