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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. all 4100's interchangable?
  2. A/C Compressor Belt Bypass - 89 Deville 4.5
  3. Flowmaster Exhaust for a 4.9 Deville
  4. Is this engine rebuildable?
  5. C bieng displayed
  6. 4.1 Spun a cam bearing,
  7. '93 Eldorado, 4.9L - Bad Fuel Pump?
  8. For those of you with coolant loss issues.
  9. New brain wracking symptom...
  10. Synthetic oil no no in 4100
  11. Question when torquing headbolts 4.9L
  12. Case of the Evil Tranny
  13. 1986 cadillac Stalling up hills, need help ASAP
  14. I'm going to try the 4.1->4.9 conversion
  15. will my 4.9 fit?
  16. I really need help, please!
  17. 4.9 and spark knock
  18. 4.9 Oil Filter ??
  19. Lound thump when shutting off engine, then no restart
  20. Need Help ASAP!!!!!!
  21. heat issues!!!!
  22. 4.5 Allante Intake on a 4.9 Eldorado
  23. 4.1 Running Bad Again
  24. E20 - Open Fuel Pump Circut Feedback Signal
  25. What should I do, buy or walk? 89 Coupe Deville
  26. new and need some help please!!!!!
  27. Coupe Deville 4.5 Rough Running
  28. Piston 6 hits sparkplug - Bad timing
  29. 1994 Sedan Deville questions...
  30. Broken Upper Radiator Hose Connector
  31. 4.9 water pump
  32. Two Problems Not Starting and Stalling
  33. Help my 91 cadilliac deville 4.9
  34. Mustard like substance in radiator
  35. Crazy Coolant Temperatures
  36. oil change
  37. How do you clean 4.5 throttle body?
  38. '93 Eldorado, 4.9L - Partial Fire, No Start
  39. 4100 Updated intake gasket set
  40. Haynes or Chiltons
  41. New to Throttle Body Injection?
  42. 4.1 to 4.5
  43. 4.9 litre--flat tappet engine?
  44. Exhaust Muffler
  45. 90 eldo-possible tranny issue and engine issue
  46. 88 4.5L Running rough
  47. deck height and bore spacing
  48. mechanical water temp guage
  49. 4100 RWD replacement source
  50. How do you get to the back of the FDC
  51. Hall Effect
  52. 4.5 engine swap
  53. 4.9 isc adjustment: Thanks Ranger
  54. 250 or 252?
  55. 2002 DTS trouble
  56. Problem of the day :)
  57. egr question
  58. wont start cold
  59. Water Pump Tasks ahead
  60. Member 92 Seville 89 - Old Threads
  61. Got mother's 1985 Fleetwood Brougham with HT4100
  62. Possible ECM problem
  63. 4.5 Liter - Last chance before I need to give it up.
  64. The Mythical 4.9 performance Chip
  65. 4.9 liter vanity cover removal.
  66. 4.9 engine
  67. Right the wrongs in a 4.1 (4100)
  68. 4.9's torque
  69. 1986 Eldorado stalls under stress
  70. '94 Deville 4.9l torque conv. clutch prob?
  71. 94 Deville won't start
  72. "The Cadillac 4.1 liter engine is beyond hope for this formula"
  73. ht4100- stop engine-oil pressure light flickers
  74. 4.1 dampener pulley bolt
  75. Need help finding power steering bracket
  76. 4100? worth rebuilding
  77. Code E26 and E27
  78. 4.9 swap
  79. Popular car... at the junkyard
  80. 4.9 timing chain replacement ?
  81. I need a new throttle body
  82. Trouble codes?
  83. 1984 Fleetwood 4.1
  84. 4.1 Question
  85. 82 deville tranny problems
  86. 91 Caddy DeVille Sedan Belt
  87. latest 4.1 repairs
  88. cost of tps
  89. 93 deville "CHUNKing" while reved in park or nuetral.
  90. Got new plugs/wires installed on 4.9 today.
  91. '93 Eldorado - Relays - ELC System
  92. 93 Seville 4.9-Crank position sensor location?
  93. 93 Won't Start
  94. When you buy a remain. ecm, does it come already flashed?
  95. 93 SD 4.9 Gurgling back into the overflow tank
  96. 92 deville sound at engine starts and stops
  97. 4.9 switched to 87 oct., hard starts, re-time?
  98. The Surge - in my 4.9, not Iraq...
  99. Air cleaner cold start door
  100. 4.5 Computer Tachometer
  101. think these are the same parts?
  102. no chime? cant' open gas lid?
  103. engine pinging???
  104. 93 Started, now can't keep belt on
  105. Stop Engine - Oil Light on 1988 4.5L V8
  106. 4.9 ticking when cold
  107. radiator 1983 Eldorado refurb?
  108. engine pinging off the line?
  109. New Transmission Fluid and Filter
  110. New throttle position sensor?
  111. 1991 Seville 4.9L Engine Stumble (TECH PLEASE)
  112. 92 Deville, accelerated on it's own. Friend kinda fixed it but now..
  113. last problem with HT4100 (I hope)
  114. where is this supposed to connect
  115. '86 DeVille rear main seal
  116. 4.9 has irratic idle can you help
  117. Head gasket maybe but hope not!
  118. 91 Deville Distributor Coil wiring diagram
  119. Fuel Type?
  120. "illumina" and other Gurus
  121. I Have Codes... Can anyone interpret?
  122. where are the major grounding straps?
  123. Plug Gap on 4.9L??? (also Bosch Injector Question)
  124. Weak Battery + Hot Engine - Bad Alternator?
  125. 4.1 Spark Plug Wires Problem Solved (Maybe)
  126. Have to pump gas pedal to get it to start, then it runs fine??
  127. high output alternator
  128. 4.9L coolant leak
  129. Your advice on the HT 4100 needed/appreciated
  130. Pain at the pump and the inspectors
  131. Sedan Deville 4.1 to 4.5 Disaster Swap “This time I’ll get right”
  132. Cannot getg into E.6.3 ISC Motor
  133. A/C refrig. temp. sensor question?
  134. Need wiring diagrams.
  135. 1992 4.9 injector replacement
  136. HT4100 SES light @ low RPM, much stalling & near stalling
  137. Throttle body spacers on a 4.? engine
  138. In need of some numbers....
  139. clamp-down dist caps
  140. Can anyone interpert this A/C gauge reading??
  141. 4.9 RWD 5 speed
  142. 4.9l Rpm
  143. 92 Cadillac Eldo AC Leak near the fire wall
  144. Fan Belt Upside Down on Ebay Car?
  145. Fuel Injection Cleaning?
  146. 4.5L engine runs rough
  147. sings of a head gasket falure in a 4.5
  148. car took a dump today
  149. Power Steering Pum Removal on 4.9
  150. HT 4100 4.1 motor problems - giving up
  151. Th-th-th-that's all folks!
  152. 4.5 comparied to a 4.9
  153. All oil gaskets/seals on engine RH side
  154. 4.9L '93 Seville: How do I replace the pickup coil?
  155. 4.9 reverse flow cooling
  156. 1994 Cadillac Deville,4.9L
  157. side gaped spark plugs on a 4.x
  158. Oil Feed Pipe o-ring
  159. 4.5 High Rev
  160. torque converter portability
  161. 4.9 Unstable Idle
  162. question engine deville 4.5
  163. deville 4.5 and gm taps
  164. How common is this?
  165. 85 Seville HT4100
  166. 1987 - 1989 Fan Control Module
  167. 1989 Seville code E13 Oxygen sensor not ready
  168. Another question - 89 Seville air conditioning leak
  169. I'm afraid to buy these cars ....
  170. Water Pump Inlet Repair help
  171. Question Regarding '85 Eldo TPS Fix???
  172. 1992 Deville fails NOx emissions test
  173. stripped head bolt please help!!!!!
  174. anyone know tps ranges
  175. Cruise Control Problem!!
  176. 1982 Deville check engine light
  177. 4.9 liter--replacing heater core "hoses".
  178. ignition!!!!!!!!
  179. Reverse slipping?
  180. 4.5 Miss under full throttle
  181. 4.5 questions
  182. electrical diagram needed ASAP
  183. 86 Seville, 4.1, low idle in drive
  184. The worst gas miliage ever
  185. engine stopped while driving on highway, inside temp not right
  186. A/C Bypass belt length for 4.9
  187. my 4.1 compression numbers
  188. 4.9l stumble
  189. Finally replacing 4.9 main bearings
  190. Mystery drainage of radiator?
  191. ht 4100 crankshaft flange 9Harmonic balancer) removal tool?
  192. 85 eldo 4.1
  193. HELP! 4.9 Missing and Dist. cap clicking!
  194. i need advice from a tech!!!!!!
  195. A/C Bypass Belt for 4.5L w/Calif Emissions
  196. 4100 Fuel Problem - Advice Please...
  197. gear indicator fault :(
  198. 88 Sedan Deville 4.5L intermittently starts, sometimes dies driving
  199. Alternator Pulley
  200. plug wire routing conduit/loom
  201. 92 Deville 4.9 FPR
  202. New Life
  203. Performance 4.9
  204. car doesn't switch to 3rd gear
  205. 83 4.1 overheated, now, an ISC problem !
  206. 1989 Deville code help
  207. 1989 Deville code help
  208. 83 Eldo 4.1 Climate Control only lights sometimes
  209. A/C Compressor Clutch Engagement Issues
  210. Coolant Leak
  211. Loud bang, car won't turn over. 4100 '82 Deville
  212. Water in oil - Head/intake maniforld gasket job
  213. Cleaning an ISC motor from a 1989 Seville
  214. 95 DeVille PCM Codes
  215. Coolant Change and GM Sealant Questions
  216. 83 Eldo 4.1 Hesitation upon accelleration
  217. Severs Idle Problem
  218. Transmission Cooler Lines
  219. 4.5-4.9 less inclined for h.g. problems
  220. Transmission advice
  221. transmission parts and specks
  222. B336 code, 86 seville
  223. wont start when warm
  224. Carnut, got it to work, Thanks !
  225. Which a/c compressor to buy for round 4...advice please
  226. 89 Seville ignition switch click - VATS?
  227. Sedan Deville 4.1 to 4.5 Disaster Swap “This time I got right” part 2
  228. 1986 deville 4.1L
  229. 83 Eldorado 4.1 auto OD Trans Model # Please
  230. What is this hose called???
  231. Clattering noise from engine front area
  232. Trouble Starting When Warm
  233. Rough running, bad mileage, unstable idle
  234. How do I bypass PASKEY
  235. 4.9 Software
  236. One problem fixed another shows up. Starter
  237. Block number?
  238. RTV on Oil-Pan gasket