: HT4100 4.1, 4.5, 4.9



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  1. 1985 eldorado biarritz won't start
  2. 4.9 pulled head bolt threads
  3. Hesitation on an 83 cadillac fleetwood brougham with HT4100 motor
  4. 95 sedan shuts down while driving
  5. 93 SDV 4.9 spark plug replacement post mortem (can't edit other thread)
  6. Driving along and suddenly, DEAD!
  7. Starter Gear Clearance
  8. Replacing original plugs/wires 93 SDV........wish me luck!
  9. 4.9 - intake
  10. Idle Problems After Mechanic
  11. Lurching '91 Deville
  12. Can FWD HT 4100 eng and transmission be installed together?
  13. '82 Fleetwood D'elegance coupe problem :(
  14. replacing water pump on my old '84 DeVille 4.1 engine
  15. What are the symptoms of CVJ’s failing?
  16. distributor question
  17. Car not starting
  18. Problem with 1990 Seville 4.5
  19. change spark plugs, 1989 seville 4.5
  20. Oil Leaking from "Everywhere"
  21. 4.1 to 4.1 swap, how hard can it really be???
  22. School of hard knocks
  23. 90 deville 4.5 stalling problems
  24. 1983 Eldorado engine running problem!
  25. Carburetor on V8 4100 HT Eldorado 1985 ?
  26. need some help with my 1994 Deville 4.9L v8
  27. Did I miss anything?
  28. hard starting 1997 STS
  29. 1991 Cadillac Biarittz - Engine problem.
  30. First Caddy Questions
  31. The best engine to put in my Eldo Cadillac?
  32. Stumped!
  33. 1990 cadillac deville
  34. Please Help - error code 19 on 84 Deville ht4100
  35. Fuel Pump Relay - 84 Deville HT4100
  36. Where is the oil pressure switch located - 84 Deville HT4100
  37. Remanufactured 4.1 available
  38. 4.9 Belt Tensioner Question
  39. Rough Running 4.9 - Please Help !
  40. Removing the AIR pump, HT4100
  41. 4T60-E Transaxle, feels like park paw spring is worn out.
  42. Seville Swap: from 83 HT4100 to 81 368
  43. 86 seville 4.1 low engine power-issue
  44. leftover 4.x parts
  45. 4.5 RWD engines for sale?? would this work??
  46. '85 Seville HT 4100 MAP location & mystery connectors ?
  47. awesome 440T4->4T65E conversion
  48. Difficult to start engine in Eldorado 1983
  49. Rough Idle on low mileage 91 Eldorado
  50. "system problem"
  51. Purpose for detent switch and kickdown?
  52. Basics for operating ECM on 84 Deville HT4100??
  53. 4.5 Overheating. Need help
  54. PD08 and Spark Timing
  55. Where is the a/c low pressure valve on a 1990 Seville?
  56. 1985 DeVille Whats That, (Fuel System Canister Valve?)
  57. 4.5 will not go into timing mode, desperately seeking advice
  58. Torque Specs
  59. Looking to replace camshaft to fix lack of power & hesitation - ht4100
  60. HT 4100 engine problem
  61. 84 cadillac eldorado ht4100 rough idle at acceleration
  62. ISC Adjustment & the mysterious green connector
  63. Thinking of picking up an '83 Fleetwood HT4100
  64. Advice, please: 4.9 Cruise Control Cable Stuck
  65. 1995 Sedan Deville HEAD Gasket
  66. 88 seville instrument panel
  67. Need Help with timing/tune-up on 84 Cadillac Deville HT4100
  68. Bad Misfire on Low Mile 4.9 (1991 Eldorado)
  69. thinking about getting mods on 4.5
  70. Vapor Canister Filter
  71. Oil for 4100
  72. Code E49 Air Injection System Fault
  73. 4.5 distributor removal
  74. significant improvements in 94/95 4.9?
  75. Name the Emission Tube for 1990 4.5
  76. source for 4.x cylinder sleeves
  77. 4.9 throttle body interchange data
  78. Engine Swap Process
  79. 4.9 Individual Throttle Body project
  80. 91 Deville - skipping and no 1st or 4th gear-HELP
  81. 96 deville alternator
  82. Falling MPG - 1990 Deville/Fleetwood
  83. 4.5 carb and distributor conversion
  84. A/C Repair
  85. 4.9 running rough after spark plug change Help!
  86. New annoying message: "Change Oil Soon" (just changed it last month!)
  87. 4.9 Horrible Idle
  88. 1993 Distributor, and Minimum Air
  89. 4.1L Idle Speed Issues
  90. 4.9 blown head gasket
  91. codes i pulled from my cadi
  92. idle engine engine hot please help
  93. Oil in coolant, 4.5
  94. 1985 Cadillac El Dorado water pump!
  95. Bad A/C Delco Waterpump. 91 Eldo 4.9 Anything better than AC Delco Waterpumps?
  96. 90' 4.5L Deville Head Bolt Leaking
  97. 4.9 no crank
  98. car is dieing at idle. P048 current trouble code.
  99. 93 Seville 4.9L sporadic miss at idle. Spark Plugs?
  100. Intermittent throttle sticking
  101. Looking for HT4100 Cylinder head guide pin
  102. E 90 Code - VCC Brake Switch Signal Problem
  103. squeeling under the hood
  104. Broke hose
  105. A Time To Celebrate
  106. 7mpg average! Help if anyone can.
  107. Heater Core Replace BRRR COLD!
  108. WARNING! 4.9L Dayco Tensioner Pulley warning: DO NOT BUY #231081!!!
  109. Throttle Questions
  110. HT4100 (4.5 sleeves) Head Bolt Torque Sequence and Specifications?
  111. 1986 Seville HT4100-Overcooling issue
  112. Can't find the engine temperature switch.
  113. Need Help PLEASE HELP!!! Oil dipstick problem
  114. Cold Air Intake?
  115. Oil pan and pump
  116. Can bad ECM cause 85 fleetwood brougham ht4100 miss bad, backfire and barely run?
  117. New Car Got Questions????
  118. the notorious 4.1 thump
  119. Recently rebuilt 85 ht4100...was fine....all of a sudden struggling and backfiring
  120. 4100 Valve train not oiling
  121. E49 code and possible solutions.
  122. timing
  123. 1990 Seville-Message DTC R026 / RO33
  124. E47
  125. burning
  126. e23 and e27
  127. Idle speed control problem? 90 Deville 4.5
  128. E37 code manifold air temp. sensor
  129. 85 fleet ht4100 fwd
  130. Disributor slop question
  131. 1988 Cadillac DeVille 4.5L gas gauge issue
  132. Fuel Line
  133. 4.9 oil pump in 4.5
  134. Colder Spark Plugs
  135. Twinkling lights
  136. Stainless steel exhaust, 90 Deville
  137. 4.1 Intial Timing Question
  138. 92 Deville stalling and backfiring
  139. 4.1 TPS Question
  140. 4.5L Deville runnability issues/ emissions problems
  141. Can I supercharge my 2008 STS AWD?
  142. 85 eldo w/4100
  143. UGH watter pump gasket
  144. Do Not Overfill!
  145. Techheads, answer me this:
  146. allante 4.5! awesome
  147. Replacing head gasket on 1992 4.9
  148. Fuel Imbalance (Left and Right Bank)
  149. leaky rear main oil seal
  150. Persistant Leaking
  151. Coolant Header Tank
  152. Exhaust manifold gaskets
  153. How to adjust idle speed on '91 Eldorado 4,5l V8 ?
  154. Do I have a blown head? And should I replace my motor? 93 Sedan Deville 4.9L V8
  155. What engines are compatible with 93 Sedan Deville?
  156. 4100 to 307 swap (ITS ALIVE!)
  157. high idle after washing engine
  158. spark plugs
  159. 4.9 stumbling right off idle
  160. @50MPH & above; Doggy and slight vibration
  161. Trying to Identify this Hose
  162. 4.1 to a 4.5
  163. 4.x perf options
  164. 93 deville turn signal problems
  165. Oxygen Sensor Code 44
  166. 4.5 in an Isuzu Trooper
  167. 1990 Fleetwood fwd 4.5L Surges and looses power when warm
  168. 84 Eldorado torsion bar anchors
  169. power steering pump bracket
  170. cooling fans
  171. need to replace a couple fuel injectors, any advice before pulling the fuel rail, etc
  172. 84 eldo. antena
  173. replacing a 4.1
  174. Where do I connect Tach
  175. So how old is too old for injectors?
  176. 4.9L missing
  177. Ht4100 question
  178. HT4100 Exhaust Manifold Gaskets
  179. Transmission is shot
  180. 93 deville running great
  181. Fuel Pump runs, but car won't start!
  182. 4.5 distributer 180 out?
  183. 4.9 Distributor / Timing question
  184. Changing Final Drive ratio/ ECM tuning
  185. looking for a good 4100 mechanic
  186. '84 4.1 idles up and down when the A/C is on
  187. Transmission acting funny
  188. HT4100 upkeep and maintenence
  189. P.A.S.S. security system
  190. What is effected by an E0112?
  191. Clunkin Sound
  192. lost my top-end
  193. What is F15 code? ('90 DeVille 4.5)
  194. '84 Eldorado 4100 vacuum readings
  195. Interchangeability HT4100
  196. O2 sensors : 1 righ and 1 lean
  197. Just wanted to thank you guys
  198. '92 Fleetwood DeVille random stalling
  199. New Life in my 94 caddy
  200. Anyone done a 4100 head gasket replace?
  201. Low oil pressure - stop engine
  202. Fuel pump running, car not....
  203. 1996 deville with 200 deville engine swap.Possible??
  204. 92 Eldorado Valve Cover Gaskets
  205. HT4100 engine vacuum lines with pics
  206. 92 4.9L, not sure if radiator fans are coming on
  207. Shorted MAP Sensor Signal
  208. 85 HT4100 new remanufactured motor
  209. S10 Chevy p'up; swap in a 4.5 or 4.9?
  210. Replacing the starter on a 1987 Cadillac Eldorado with 4.1L V8
  211. 4T60-E + Ratchet Shifter
  212. 85 HT4100 smokes when shut off?
  213. Intake Gaskets
  214. Gaggle of codes, ugh!
  215. HT 4100 no oil pressure new rebuilt motor
  216. rebuilt HT 4100 no oil up top or oil pressure
  217. Opinions on my very special '93 FWD C-Body
  218. 4.1 oil leak
  219. 92 deville wont start
  220. Tunercats
  221. chugging and backfiring intermittently. No codes
  222. 1992 4.9 Coolant Mystery
  223. 90 4.5 exhaust manifold threads
  224. EGR interchange
  225. 4.9 fuel pump question
  226. The DIY Injector Test Bench
  227. Wont start please help
  228. Loss of electrical; intermittent problem
  229. Alternator
  230. Distributor Sound
  231. Tired of &^%$ injectors!
  232. egr problems?4.9
  233. Help with '91 ETC codes.
  234. ECM interchangeability and swap
  235. 1991 Deville Leaking Coolant near water pump
  236. ECM specs, where do I find them?
  237. Outside temp
  238. No oil up top, what am I missing?
  239. ECM injector driver damage?
  240. Thoughts on supercharging 4.9
  241. Anyone Need a 90 deville FSM
  242. broke down before belt came off pump and belt tensioner bracket cracked
  243. Steering
  244. getting wierd OBD I codes what is it bad computer?
  245. 4.9 ever used in a hearse?
  246. need help antifreeze leak 4.9 1993 deville
  247. ok just need some info
  248. 4.5 head gaskets
  249. Code 52.
  250. 84 Seville 4.1L with "Random Toyota Acceleration" issue