: HT4100 4.1, 4.5, 4.9



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  1. swap 4.1 to a 4.5 or 4.9 in 85 Seville?
  2. swap 4.1 to a 4.5 or 49 in 85 Seville?
  3. More HT4100 Tips
  4. engine knock in my 1994 sedan deville 4.9L
  5. Well, i raced 3 cars in one night with my 4.1
  6. No start, at operating temp, Flooding on restart
  7. Help Ecm/PCM Questions
  8. New Addition to the Family--85 Sedan Deville
  9. Code Analyzer
  10. slight hesitation at cold low-gear
  11. HT4100 chosen as one of the worst engines of all time
  12. Valves too far in advance or too far retarded?
  13. 1992 Cadillac STS 4.9L Issues
  14. Decking out my 4.9
  15. '93 Eldorado 4.9L - P012 & P053 Codes
  16. Urgent Help W/engine
  17. Code e048 what's the trigger?
  18. which O2 sensor for 85 DeVille/HT4100
  19. 4.9 Code 41 Saga Continues!!!
  20. 83 fleetwood 4100
  21. Huge Problem HELP !!!
  22. Cam sensor 4.9
  23. 4100 Newbie needs help!
  24. HT4100 "STOP ENGINE-OIL PRESS" light flickering
  25. Interesting 4.9 symptom, need ideas
  26. Help wth tps (Throttle Position Sensor) problem/ Or just removing Throttle Body
  27. Injector Trouble 4.9
  28. Crank pulley wont spin...
  29. She runs!
  30. 84 Seville - low speed hesitation
  31. How long will it last?
  32. 4.5 to 4.9
  33. 85 Seville 4.1 Knocking?
  34. poor gas milage
  35. Outside temp sensor location---4.9 litre.
  36. My Car is Fixed!!! New Camshaft and Lifters
  37. Water pumps...Generally speaking.
  38. NOISEY cold start ups with the pulleys, only to quiet down when warm.
  39. 93 deville 4.9 noisey cold pulleys, quiet when warm. whats going out?
  40. My speedometer is WAY off, and has problems in park
  41. 91 deville Starter enable relay
  42. gas issue
  43. '88 DeVille EXTREME ISC problems
  44. 92 STS - Stalls anywhere but the highway.
  45. 93 Eldawg Stalls while driving but drives great
  46. EGR System Question
  47. 1987 Cadillac Deville No Fuel Preasure Im lost
  48. ECM questions
  49. Bosch 19# Injectors
  50. I Lost First Gear, Car barely moves with throttle!
  51. 83 Deville Performance?
  52. would an oil stabilizer help with burning
  53. OBD1 Codes
  54. HT4100 Brand New
  55. Help! 1983 Seville with HT-4100 FWD, need ideas for a swap-out?
  56. 85 Fleetwood FWD Won't Start! Help!
  57. Any good 4.x mechanics in the Detroit area?
  58. Water Pump Removal
  59. 1985 4.1L Distibutor Drive Gear for oil pump
  60. 6.0L? say what?
  61. '91 4.9 swap into a rear drive application?
  62. 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start
  63. Possible Transmission Problem when shifting from park
  64. Water Pump - Snapped Bolt
  65. replacing camshaft bearings?
  66. 85 Deville 4.1L Oil problems.
  67. Won't Start After Driving
  68. need help concerning tune up
  69. should I replace the catalytic converter
  70. 1990 deville shifting problem
  71. TBI injectors
  72. Flat cam or bad lifter?
  73. Code E15???????
  74. flickering Service Soon and no codes...
  75. 4.1 Engine: Sensor Above #8 Spark Plug?
  76. how many mods do you all know about?
  77. high output alternator
  78. ISC RPM Out Of Range
  79. Non GM parts=sick Cadillac??
  80. 4.9 Deville Concours driving terrible again!
  81. Torque converter lock up solenoid, Where?
  82. Engine Swap
  83. 85 Eldo HT 4100 ISC/TPS
  84. 4.5 spark plugs
  85. 4100 engine temp??
  86. Weird 4.9l issues
  87. Finally Solved 4.1 Hesitation: Coil & Plug Wires
  88. Need help with 85 Eldo HT4100 Tuneup
  89. 91 Fleetwood injector impedence?
  90. How do I access the internal codes and what are the normal parameters for a '92 4.9?
  91. SERVICE SOON telltale light!!
  92. Cadillac 4.5L PFI and 4.9L PFI IAT?
  93. my 4100--what would you do
  94. Another BIG 4.x Engine Tip--Especially for 4.1 Owners
  95. what is that god awful smell
  96. '92 Deville 4.9 runs great at startup, runs like crap when hot
  97. e44 o2 error
  98. 4.1 Sputters and pops
  99. Tips on swapping HT4100 for 500
  100. Coolant Temp Light = Sensor?
  101. Need Tps Help
  102. 4.9l Starter Connection Problem
  103. 91 Deville 4.9l No Start Issue
  104. 4.9 stalling problem,and allante question
  105. Conflicting torque information
  106. Replaced Water Pump on 89 4.5 Still leaking
  107. 4100 seville engine swap help needed
  108. 4.1 to 4.9.... RWD?
  109. Blower motor not operating
  110. Any great 4.9 mods?
  111. Remanufactured HT4100 - 10K and now oil in radiator/leak
  112. HT4100 Running BAD when warm.
  113. EGR stack tubes?????
  114. HT4100 Backfires
  115. Checked your A.I.R. system filter lately?
  116. 1990 Deville PRNDL problem
  117. 1990 Deville running poorly.
  118. Thanks for the muffler info
  119. Fuel/exhaust smell seems too strong...dangerous?
  120. 4.9ltr Northstar performance?
  121. anyone know how to remove the crankshaft pully 1990 deville 4.5
  122. 1994 Deville Running Rough
  123. What does this code mean?
  124. Fuse Popping on AC Clutch
  125. 93 Seville 4.9 rough idle, slow response, P041 code
  126. 1985 Eldorado Engine Died! help!
  127. A 4.X Water Pump Story - Not for the Faint of Heart
  128. service vehicle soon is on my dash
  129. Intake gaskets leaking...common problem on the 4.9?
  130. newbie need help
  131. 4.9 Pinging
  132. Stumbling on the on ramps 4.9
  133. Advice/Help Please -- Goodyear Gave Up
  134. 4.9L idle issues... no power.. etc.. TPS?
  135. 4.9 Engine Oil Capacity - 92 Seville
  136. Eldorado Driveability
  137. New member planning mods to 90 STS
  138. 4.5L TBI whistling
  139. 4.9L 1991 Seville driving me crazy - won't start
  140. Fuel Data Center Answers
  141. PCV valve location on 4.9 litre.
  142. HT4100 Driveability Question/Problem
  143. Replacing water pump on '87 4100 - tips?
  144. Plug Wire Order-87 Ht4100
  145. intermittent miss and other weird happenings
  146. 4.5 Cooling System Woes...
  147. HT4100 SYSTEM PROBLEM E047 and B334
  148. Is lifter tick normal on a 4.9?
  149. Coolant and Supplement Change Intervals
  150. 4.1 v8 injector resistance
  151. OIL cooler lines leaking
  152. engine oil
  153. Need help
  154. Need a little help
  155. No Spark
  156. Normal??
  157. Coolant Questions
  158. Another tip for 4.x car owners
  159. Trans Fluid Capacity, '93 Deville, 4.9
  160. dumb question, anyone know where the pcv is on a 4.9?
  161. 4.9 hesitates on highway
  162. How many miles can you expect out of a 4.9 engine and transmission?
  163. 4.9 Exhaust Note
  164. 4.9 Will Not Idle Below 2500rpm!
  165. Engine miss.......AGAIN
  166. Ht4100 V8
  167. Need transmission advice, please!
  168. Not Sure What Engine I have
  169. Turbo Muffler on a 4.9
  170. Premium Fuel in the 4.9?
  171. Ht4100
  172. HT4100 v8 frd eldorado
  173. Alternator issues
  174. HT4100 Hesitation Advice
  175. A/C Recharge
  176. Anyone change a starter on a FWD 4100?
  177. ac problems
  178. 1991 Seville
  179. 1985 Eldorado thinks it a diesel?
  180. 4.9 Problems at Wide Open Throttle
  181. Eldorado and the 4.1 engine ... ????
  182. HT 4100: Avoid at all costs????? Help!
  183. Changed PCV Valve at 98k Miles
  184. Engine Noise
  185. Speed Limiter
  186. Starter/voltage problem...
  187. engine swaps - 4500, 4900, 4100 engines
  188. Service Engine Light
  189. tachometer [jumps] 4.9 Seville
  190. boost HP on a 4.9 in my 1992 seville
  191. 83 Coupe Deville hard code 33 problems
  192. 4.9 shudder when at idle
  193. Possible injector leaks?
  194. Out of no where, my 92 Eldo did not start today.
  195. HT4100 Engine 250V8
  196. Help with and '89 Deville w/4.5L
  197. Tune-up questions, spark plugs
  198. Mystery Grind in Transmission, Engine, Where?
  199. 85 Deville 4100 Driveability
  200. I dread turning this car off!
  201. 4.9 instead of 4.5??
  202. 88 cdv
  203. Should I buy a car with a 4.1 L Engine?
  204. Ok ive given up on this engine.
  205. Oil test shows coolant contamination in 4.9!
  206. Need 2 things please...
  207. honest mpg of 4.9 city driving survey
  208. transmission bump on downshift
  209. ISC motor 1993 Deville
  210. Think i messed something up
  211. A little help needed identifying a loose connector
  212. Intermittent ISC? TPS? Problem still
  213. 4.9 STILL runs rough sets codes
  214. TPS Question
  215. Maitenance Questions, 4.9L 1993 Deville
  216. loud rumble now when stopping now
  217. 4.1L Oil Cooler path through Radiator
  218. Can overheating a 4.9L once damage your headgaskets?
  219. 4.9L: original red/blue A/C valve caps?
  220. Better intake for the 4.1L
  221. Idle is too high now
  222. Slight fuel leak at TBI
  223. Check Vehicle Light
  224. Setting Timing on '84 HT4100 4.1L
  225. tuning Questions for a 93 deville
  226. gas leak from cannister (85 Eldorado)
  227. High startup idle?
  228. Car wont shift on its own but shifts manually
  229. Coolant Supplement?
  230. Calling all 4.5 PFI and 4.9 PFI Owners
  231. Think the engine/tranny would last?
  232. Rocker Arm Support Part Problem-HELP?
  233. Problems w/ 4.9
  234. HT4100 Misfire Question
  235. indexing spark plugs
  236. 4.5L L (front) Cracked Header
  237. Alternator Issues--Please Help!
  238. Another Isc Question?
  239. 4.1L.. What's the problem?
  240. Best way to bleed the cooling system?
  241. car runs too rich didnt pass smog
  242. ht4100 engine cleanup. how to?
  243. Why An Aluminum Block with Iron Heads?
  244. 1985 deville runs great but
  245. 85 Seville with 4.1 Engine: Buy or Run?
  246. Anyone change the valve cover gaskets?
  247. Horrendous gas mileage
  248. Failed smog test - high CO
  249. Looking f/a 4100 4.1?
  250. 85 Deville TV Cable Adjustment