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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. A/C Bypass Belt for 4.5L w/Calif Emissions
  2. i need advice from a tech!!!!!!
  3. HELP! 4.9 Missing and Dist. cap clicking!
  4. 85 eldo 4.1
  5. ht 4100 crankshaft flange 9Harmonic balancer) removal tool?
  6. Mystery drainage of radiator?
  7. Finally replacing 4.9 main bearings
  8. 4.9l stumble
  9. my 4.1 compression numbers
  10. A/C Bypass belt length for 4.9
  11. engine stopped while driving on highway, inside temp not right
  12. The worst gas miliage ever
  13. 86 Seville, 4.1, low idle in drive
  14. electrical diagram needed ASAP
  15. 4.5 questions
  16. 4.5 Miss under full throttle
  17. Reverse slipping?
  18. ignition!!!!!!!!
  19. 4.9 liter--replacing heater core "hoses".
  20. 1982 Deville check engine light
  21. Cruise Control Problem!!
  22. anyone know tps ranges
  23. stripped head bolt please help!!!!!
  24. 1992 Deville fails NOx emissions test
  25. Question Regarding '85 Eldo TPS Fix???
  26. Water Pump Inlet Repair help
  27. I'm afraid to buy these cars ....
  28. Another question - 89 Seville air conditioning leak
  29. 1989 Seville code E13 Oxygen sensor not ready
  30. 1987 - 1989 Fan Control Module
  31. 85 Seville HT4100
  32. How common is this?
  33. deville 4.5 and gm taps
  34. question engine deville 4.5
  35. 4.9 Unstable Idle
  36. torque converter portability
  37. 4.5 High Rev
  38. Oil Feed Pipe o-ring
  39. side gaped spark plugs on a 4.x
  40. 1994 Cadillac Deville,4.9L
  41. 4.9 reverse flow cooling
  42. 4.9L '93 Seville: How do I replace the pickup coil?
  43. All oil gaskets/seals on engine RH side
  44. 4.5 comparied to a 4.9
  45. Th-th-th-that's all folks!
  46. HT 4100 4.1 motor problems - giving up
  47. Power Steering Pum Removal on 4.9
  48. car took a dump today
  49. sings of a head gasket falure in a 4.5
  50. 4.5L engine runs rough
  51. Fuel Injection Cleaning?
  52. Fan Belt Upside Down on Ebay Car?
  53. 92 Cadillac Eldo AC Leak near the fire wall
  54. 4.9l Rpm
  55. 4.9 RWD 5 speed
  56. Can anyone interpert this A/C gauge reading??
  57. clamp-down dist caps
  58. In need of some numbers....
  59. Throttle body spacers on a 4.? engine
  60. HT4100 SES light @ low RPM, much stalling & near stalling
  61. 1992 4.9 injector replacement
  62. Need wiring diagrams.
  63. A/C refrig. temp. sensor question?
  64. Cannot getg into E.6.3 ISC Motor
  65. Sedan Deville 4.1 to 4.5 Disaster Swap “This time I’ll get right”
  66. Pain at the pump and the inspectors
  67. Your advice on the HT 4100 needed/appreciated
  68. 4.9L coolant leak
  69. high output alternator
  70. Have to pump gas pedal to get it to start, then it runs fine??
  71. 4.1 Spark Plug Wires Problem Solved (Maybe)
  72. Weak Battery + Hot Engine - Bad Alternator?
  73. Plug Gap on 4.9L??? (also Bosch Injector Question)
  74. where are the major grounding straps?
  75. I Have Codes... Can anyone interpret?
  76. "illumina" and other Gurus
  77. Fuel Type?
  78. 91 Deville Distributor Coil wiring diagram
  79. Head gasket maybe but hope not!
  80. 4.9 has irratic idle can you help
  81. '86 DeVille rear main seal
  82. where is this supposed to connect
  83. last problem with HT4100 (I hope)
  84. 92 Deville, accelerated on it's own. Friend kinda fixed it but now..
  85. 1991 Seville 4.9L Engine Stumble (TECH PLEASE)
  86. New throttle position sensor?
  87. New Transmission Fluid and Filter
  88. engine pinging off the line?
  89. radiator 1983 Eldorado refurb?
  90. 4.9 ticking when cold
  91. Stop Engine - Oil Light on 1988 4.5L V8
  92. 93 Started, now can't keep belt on
  93. engine pinging???
  94. no chime? cant' open gas lid?
  95. think these are the same parts?
  96. 4.5 Computer Tachometer
  97. Air cleaner cold start door
  98. The Surge - in my 4.9, not Iraq...
  99. 4.9 switched to 87 oct., hard starts, re-time?
  100. 92 deville sound at engine starts and stops
  101. 93 SD 4.9 Gurgling back into the overflow tank
  102. When you buy a remain. ecm, does it come already flashed?
  103. 93 Won't Start
  104. 93 Seville 4.9-Crank position sensor location?
  105. '93 Eldorado - Relays - ELC System
  106. Got new plugs/wires installed on 4.9 today.
  107. 93 deville "CHUNKing" while reved in park or nuetral.
  108. cost of tps
  109. latest 4.1 repairs
  110. 91 Caddy DeVille Sedan Belt
  111. 82 deville tranny problems
  112. 4.1 Question
  113. 1984 Fleetwood 4.1
  114. Trouble codes?
  115. I need a new throttle body
  116. 4.9 timing chain replacement ?
  117. Popular car... at the junkyard
  118. 4.9 swap
  119. Code E26 and E27
  120. 4100? worth rebuilding
  121. Need help finding power steering bracket
  122. 4.1 dampener pulley bolt
  123. ht4100- stop engine-oil pressure light flickers
  124. "The Cadillac 4.1 liter engine is beyond hope for this formula"
  125. 94 Deville won't start
  126. '94 Deville 4.9l torque conv. clutch prob?
  127. 1986 Eldorado stalls under stress
  128. 4.9's torque
  129. Right the wrongs in a 4.1 (4100)
  130. 4.9 engine
  131. 4.9 liter vanity cover removal.
  132. The Mythical 4.9 performance Chip
  133. 4.5 Liter - Last chance before I need to give it up.
  134. Possible ECM problem
  135. Got mother's 1985 Fleetwood Brougham with HT4100
  136. Member 92 Seville 89 - Old Threads
  137. Water Pump Tasks ahead
  138. wont start cold
  139. egr question
  140. Problem of the day :)
  141. 2002 DTS trouble
  142. 250 or 252?
  143. 4.9 isc adjustment: Thanks Ranger
  144. 4.5 engine swap
  145. Hall Effect
  146. How do you get to the back of the FDC
  147. 4100 RWD replacement source
  148. mechanical water temp guage
  149. deck height and bore spacing
  150. 88 4.5L Running rough
  151. 90 eldo-possible tranny issue and engine issue
  152. Exhaust Muffler
  153. 4.9 litre--flat tappet engine?
  154. 4.1 to 4.5
  155. New to Throttle Body Injection?
  156. Haynes or Chiltons
  157. 4100 Updated intake gasket set
  158. '93 Eldorado, 4.9L - Partial Fire, No Start
  159. How do you clean 4.5 throttle body?
  160. oil change
  161. Crazy Coolant Temperatures
  162. Mustard like substance in radiator
  163. Help my 91 cadilliac deville 4.9
  164. Two Problems Not Starting and Stalling
  165. 4.9 water pump
  166. Broken Upper Radiator Hose Connector
  167. 1994 Sedan Deville questions...
  168. Piston 6 hits sparkplug - Bad timing
  169. Coupe Deville 4.5 Rough Running
  170. new and need some help please!!!!!
  171. What should I do, buy or walk? 89 Coupe Deville
  172. E20 - Open Fuel Pump Circut Feedback Signal
  173. 4.1 Running Bad Again
  174. 4.5 Allante Intake on a 4.9 Eldorado
  175. heat issues!!!!
  176. Need Help ASAP!!!!!!
  177. Lound thump when shutting off engine, then no restart
  178. 4.9 Oil Filter ??
  179. 4.9 and spark knock
  180. I really need help, please!
  181. will my 4.9 fit?
  182. I'm going to try the 4.1->4.9 conversion
  183. 1986 cadillac Stalling up hills, need help ASAP
  184. Case of the Evil Tranny
  185. Question when torquing headbolts 4.9L
  186. Synthetic oil no no in 4100
  187. New brain wracking symptom...
  188. For those of you with coolant loss issues.
  189. '93 Eldorado, 4.9L - Bad Fuel Pump?
  190. 4.1 Spun a cam bearing,
  191. C bieng displayed
  192. Is this engine rebuildable?
  193. Flowmaster Exhaust for a 4.9 Deville
  194. A/C Compressor Belt Bypass - 89 Deville 4.5
  195. all 4100's interchangable?
  196. car surges badly when stopping
  197. Blown Head gasket
  198. RPO Code of the 90 4.5L V8?
  199. 4.9 stalls
  200. Choke?
  201. New Member Introduction
  202. Allante HT4100
  203. 4100 Book
  204. replacement fuel injectors
  205. how hard is it to drop the oil pan
  206. HT4100 Recommended Oil Viscosity
  207. Tuning for E10 gasoline
  208. 4.9l oil leak
  209. Poor gas mileage/Sensors, please help a bit!
  210. HT4100 PCV valve, location?
  211. Can fuel injector effect the map sensor and how it function
  212. Losing coolant when the heat is turned on.
  213. 4.9L 1995 deville car ran out of gas but wont start
  214. VIDEO of HT4100 WOT
  215. Radiator Drain Plug
  216. 86-87 Seville, Eldorado 4.9L Swap
  217. Water Pump on an '85 fleetwood
  218. engine id
  219. 1994 deville
  220. 4.9 firing order???
  221. Won't start when hot (intermittent)
  222. 92 Deville losing power after turning a corner
  223. 76 Eldo 500 FI Problems
  224. swap 4.1 to a 4.5 or 4.9 in 85 Seville?
  225. swap 4.1 to a 4.5 or 49 in 85 Seville?
  226. More HT4100 Tips
  227. engine knock in my 1994 sedan deville 4.9L
  228. Well, i raced 3 cars in one night with my 4.1
  229. No start, at operating temp, Flooding on restart
  230. Help Ecm/PCM Questions
  231. New Addition to the Family--85 Sedan Deville
  232. Code Analyzer
  233. slight hesitation at cold low-gear
  234. HT4100 chosen as one of the worst engines of all time
  235. Valves too far in advance or too far retarded?
  236. 1992 Cadillac STS 4.9L Issues
  237. Decking out my 4.9
  238. '93 Eldorado 4.9L - P012 & P053 Codes
  239. Urgent Help W/engine
  240. Code e048 what's the trigger?
  241. which O2 sensor for 85 DeVille/HT4100
  242. 4.9 Code 41 Saga Continues!!!
  243. 83 fleetwood 4100
  244. code p091 4.9 94 deville
  245. 1994 deville 4.9
  246. Huge Problem HELP !!!
  247. Cam sensor 4.9
  248. 4100 Newbie needs help!
  249. HT4100 "STOP ENGINE-OIL PRESS" light flickering
  250. Interesting 4.9 symptom, need ideas