: HT4100 4.1, 4.5, 4.9



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  1. Rough Running 4.9 - Please Help !
  2. Removing the AIR pump, HT4100
  3. 4T60-E Transaxle, feels like park paw spring is worn out.
  4. Seville Swap: from 83 HT4100 to 81 368
  5. 86 seville 4.1 low engine power-issue
  6. leftover 4.x parts
  7. 4.5 RWD engines for sale?? would this work??
  8. '85 Seville HT 4100 MAP location & mystery connectors ?
  9. awesome 440T4->4T65E conversion
  10. Difficult to start engine in Eldorado 1983
  11. Rough Idle on low mileage 91 Eldorado
  12. "system problem"
  13. Purpose for detent switch and kickdown?
  14. Basics for operating ECM on 84 Deville HT4100??
  15. 4.5 Overheating. Need help
  16. PD08 and Spark Timing
  17. Where is the a/c low pressure valve on a 1990 Seville?
  18. 1985 DeVille Whats That, (Fuel System Canister Valve?)
  19. 4.5 will not go into timing mode, desperately seeking advice
  20. Torque Specs
  21. Looking to replace camshaft to fix lack of power & hesitation - ht4100
  22. HT 4100 engine problem
  23. 84 cadillac eldorado ht4100 rough idle at acceleration
  24. ISC Adjustment & the mysterious green connector
  25. Thinking of picking up an '83 Fleetwood HT4100
  26. Advice, please: 4.9 Cruise Control Cable Stuck
  27. 1995 Sedan Deville HEAD Gasket
  28. 88 seville instrument panel
  29. Need Help with timing/tune-up on 84 Cadillac Deville HT4100
  30. Bad Misfire on Low Mile 4.9 (1991 Eldorado)
  31. thinking about getting mods on 4.5
  32. Vapor Canister Filter
  33. Oil for 4100
  34. Code E49 Air Injection System Fault
  35. 4.5 distributor removal
  36. significant improvements in 94/95 4.9?
  37. Name the Emission Tube for 1990 4.5
  38. source for 4.x cylinder sleeves
  39. 4.9 throttle body interchange data
  40. Engine Swap Process
  41. 4.9 Individual Throttle Body project
  42. 91 Deville - skipping and no 1st or 4th gear-HELP
  43. 96 deville alternator
  44. Falling MPG - 1990 Deville/Fleetwood
  45. 4.5 carb and distributor conversion
  46. A/C Repair
  47. 4.9 running rough after spark plug change Help!
  48. New annoying message: "Change Oil Soon" (just changed it last month!)
  49. 4.9 Horrible Idle
  50. 1993 Distributor, and Minimum Air
  51. 4.1L Idle Speed Issues
  52. 4.9 blown head gasket
  53. codes i pulled from my cadi
  54. idle engine engine hot please help
  55. Oil in coolant, 4.5
  56. 1985 Cadillac El Dorado water pump!
  57. Bad A/C Delco Waterpump. 91 Eldo 4.9 Anything better than AC Delco Waterpumps?
  58. 90' 4.5L Deville Head Bolt Leaking
  59. 4.9 no crank
  60. car is dieing at idle. P048 current trouble code.
  61. 93 Seville 4.9L sporadic miss at idle. Spark Plugs?
  62. Intermittent throttle sticking
  63. Looking for HT4100 Cylinder head guide pin
  64. E 90 Code - VCC Brake Switch Signal Problem
  65. squeeling under the hood
  66. Broke hose
  67. A Time To Celebrate
  68. 7mpg average! Help if anyone can.
  69. Heater Core Replace BRRR COLD!
  70. WARNING! 4.9L Dayco Tensioner Pulley warning: DO NOT BUY #231081!!!
  71. Throttle Questions
  72. HT4100 (4.5 sleeves) Head Bolt Torque Sequence and Specifications?
  73. 1986 Seville HT4100-Overcooling issue
  74. Can't find the engine temperature switch.
  75. Need Help PLEASE HELP!!! Oil dipstick problem
  76. Cold Air Intake?
  77. Oil pan and pump
  78. Can bad ECM cause 85 fleetwood brougham ht4100 miss bad, backfire and barely run?
  79. New Car Got Questions????
  80. the notorious 4.1 thump
  81. Recently rebuilt 85 ht4100...was fine....all of a sudden struggling and backfiring
  82. 4100 Valve train not oiling
  83. E49 code and possible solutions.
  84. timing
  85. 1990 Seville-Message DTC R026 / RO33
  86. E47
  87. burning
  88. e23 and e27
  89. Idle speed control problem? 90 Deville 4.5
  90. E37 code manifold air temp. sensor
  91. 85 fleet ht4100 fwd
  92. Disributor slop question
  93. 1988 Cadillac DeVille 4.5L gas gauge issue
  94. Fuel Line
  95. 4.9 oil pump in 4.5
  96. Colder Spark Plugs
  97. Twinkling lights
  98. Stainless steel exhaust, 90 Deville
  99. 4.1 Intial Timing Question
  100. 92 Deville stalling and backfiring
  101. 4.1 TPS Question
  102. 4.5L Deville runnability issues/ emissions problems
  103. Can I supercharge my 2008 STS AWD?
  104. 85 eldo w/4100
  105. UGH watter pump gasket
  106. Do Not Overfill!
  107. Techheads, answer me this:
  108. allante 4.5! awesome
  109. Replacing head gasket on 1992 4.9
  110. Fuel Imbalance (Left and Right Bank)
  111. leaky rear main oil seal
  112. Persistant Leaking
  113. Coolant Header Tank
  114. Exhaust manifold gaskets
  115. How to adjust idle speed on '91 Eldorado 4,5l V8 ?
  116. Do I have a blown head? And should I replace my motor? 93 Sedan Deville 4.9L V8
  117. What engines are compatible with 93 Sedan Deville?
  118. 4100 to 307 swap (ITS ALIVE!)
  119. high idle after washing engine
  120. spark plugs
  121. 4.9 stumbling right off idle
  122. @50MPH & above; Doggy and slight vibration
  123. Trying to Identify this Hose
  124. 4.1 to a 4.5
  125. 4.x perf options
  126. 93 deville turn signal problems
  127. Oxygen Sensor Code 44
  128. 4.5 in an Isuzu Trooper
  129. 1990 Fleetwood fwd 4.5L Surges and looses power when warm
  130. 84 Eldorado torsion bar anchors
  131. power steering pump bracket
  132. cooling fans
  133. need to replace a couple fuel injectors, any advice before pulling the fuel rail, etc
  134. 84 eldo. antena
  135. replacing a 4.1
  136. Where do I connect Tach
  137. So how old is too old for injectors?
  138. 4.9L missing
  139. Ht4100 question
  140. HT4100 Exhaust Manifold Gaskets
  141. Transmission is shot
  142. 93 deville running great
  143. Fuel Pump runs, but car won't start!
  144. 4.5 distributer 180 out?
  145. 4.9 Distributor / Timing question
  146. Changing Final Drive ratio/ ECM tuning
  147. looking for a good 4100 mechanic
  148. '84 4.1 idles up and down when the A/C is on
  149. Transmission acting funny
  150. HT4100 upkeep and maintenence
  151. P.A.S.S. security system
  152. What is effected by an E0112?
  153. Clunkin Sound
  154. lost my top-end
  155. What is F15 code? ('90 DeVille 4.5)
  156. '84 Eldorado 4100 vacuum readings
  157. Interchangeability HT4100
  158. O2 sensors : 1 righ and 1 lean
  159. Just wanted to thank you guys
  160. '92 Fleetwood DeVille random stalling
  161. New Life in my 94 caddy
  162. Anyone done a 4100 head gasket replace?
  163. Low oil pressure - stop engine
  164. Fuel pump running, car not....
  165. 1996 deville with 200 deville engine swap.Possible??
  166. 92 Eldorado Valve Cover Gaskets
  167. HT4100 engine vacuum lines with pics
  168. 92 4.9L, not sure if radiator fans are coming on
  169. Shorted MAP Sensor Signal
  170. 85 HT4100 new remanufactured motor
  171. S10 Chevy p'up; swap in a 4.5 or 4.9?
  172. Replacing the starter on a 1987 Cadillac Eldorado with 4.1L V8
  173. 4T60-E + Ratchet Shifter
  174. 85 HT4100 smokes when shut off?
  175. Intake Gaskets
  176. Gaggle of codes, ugh!
  177. HT 4100 no oil pressure new rebuilt motor
  178. rebuilt HT 4100 no oil up top or oil pressure
  179. Opinions on my very special '93 FWD C-Body
  180. 4.1 oil leak
  181. 92 deville wont start
  182. Tunercats
  183. chugging and backfiring intermittently. No codes
  184. 1992 4.9 Coolant Mystery
  185. 90 4.5 exhaust manifold threads
  186. EGR interchange
  187. 4.9 fuel pump question
  188. The DIY Injector Test Bench
  189. Wont start please help
  190. Loss of electrical; intermittent problem
  191. Alternator
  192. Distributor Sound
  193. Tired of &^%$ injectors!
  194. egr problems?4.9
  195. Help with '91 ETC codes.
  196. ECM interchangeability and swap
  197. 1991 Deville Leaking Coolant near water pump
  198. ECM specs, where do I find them?
  199. Outside temp
  200. No oil up top, what am I missing?
  201. ECM injector driver damage?
  202. Thoughts on supercharging 4.9
  203. Anyone Need a 90 deville FSM
  204. broke down before belt came off pump and belt tensioner bracket cracked
  205. Steering
  206. getting wierd OBD I codes what is it bad computer?
  207. 4.9 ever used in a hearse?
  208. need help antifreeze leak 4.9 1993 deville
  209. ok just need some info
  210. 4.5 head gaskets
  211. Code 52.
  212. 84 Seville 4.1L with "Random Toyota Acceleration" issue
  213. cooling fan module
  214. 4.5 intake manifold gasket progress
  215. 4.9 main mearing thump getting worse?
  216. lost of power
  217. 4.9 a little jittery at idle
  218. Power brake booster vacuum hose? All Cylinders?
  219. Egr
  220. Goodwrench NEW 4.1 sticker
  221. EGR tubes and TPS question.
  222. Antifreeze on the PCV Valve
  223. Ground Locations?
  224. 4.9 Reluctant to Start, Sometimes Dies at Idle
  225. I think its the alternator
  226. how long to change all motor mounts on 93 deville
  227. Vacuum leak somewhere inside the dash
  228. What problems in removing 4.9?
  229. Spark Plugs: What do YOU run?
  230. 4.9l engine ticking noise: lifter?
  231. 4.5 or 4.9
  232. 4.5 or 4.9 Engine
  233. Pump thump
  234. Replaced intake gasket and messed something up!
  235. When I First Start The Engine...
  236. Failed emissions
  237. 89 Eldorado engine misfire
  238. Ht-4100 rwd info
  239. 4.5 V8 Underpowered? & 92-93 Deville?
  240. HT-4100 oil pan
  241. 89 deville 4.5 antifreeze leak?
  242. The screws with no size...
  243. Does a 4.5 and 4.9 share the same transmission?
  244. 93 deville passed emissions and state inspection but still getting 10MPG
  245. 1993 Cadillac Deville 4.9L computer problem (ISC problem continued)
  246. 95 Deville base 4.9 fuel pressure issues, FPR or fuel pump?
  247. Hopefull found out my problem with my 93 deville 4.9
  248. 4.5L Fuel Injectors (Aftermarket)
  249. Thinking about buying a 1997 cadillac eldorado
  250. HT4100 with serpentine belt