: HT4100 4.1, 4.5, 4.9



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  1. Harmonic Balance
  2. ECM Swap! PASSkey Question...
  3. Accel Performance Ignition Module: Real or B/S?
  4. 4100 engine temperature
  5. '90 4.5 No Cam Sensor Reference Signal Journey Through Hell!
  6. Ongoing Issues, running rough poor idle
  7. Trans cooler flush
  8. screw the whole thing - i hate the 4100... swap ideas?
  9. oil sender location - 4.1
  10. code po23??? Any thoughts
  11. 4.9 exhaust info
  12. Throttle valve cable '85
  13. oil pressure light came on - towed home
  14. clackin noise 4.9 deville
  15. Oil-leak solved!
  16. WOW this is a 4.9
  17. PO48 Current/ EGR Fault
  18. Oil Pressure
  19. E98 code on 4.5
  20. ...the HG gremlin got me
  21. Help identify 4.9 engine noise (video included)
  22. Head Gasket 91 caddy
  23. Once again......no joy
  24. BCM Location?
  25. Oil-tube gasket & o-ring
  26. 84 cdv 4100
  27. Question on oil leak - 1989 Seville
  28. No Joy....
  29. RTV on Oil-Pan gasket
  30. Block number?
  31. One problem fixed another shows up. Starter
  32. 4.9 Software
  33. How do I bypass PASKEY
  34. Rough running, bad mileage, unstable idle
  35. Trouble Starting When Warm
  36. Clattering noise from engine front area
  37. What is this hose called???
  38. 83 Eldorado 4.1 auto OD Trans Model # Please
  39. 1986 deville 4.1L
  40. Sedan Deville 4.1 to 4.5 Disaster Swap “This time I got right” part 2
  41. 89 Seville ignition switch click - VATS?
  42. Which a/c compressor to buy for round 4...advice please
  43. Carnut, got it to work, Thanks !
  44. wont start when warm
  45. B336 code, 86 seville
  46. transmission parts and specks
  47. Transmission advice
  48. 4.5-4.9 less inclined for h.g. problems
  49. Transmission Cooler Lines
  50. Severs Idle Problem
  51. 83 Eldo 4.1 Hesitation upon accelleration
  52. Coolant Change and GM Sealant Questions
  53. 95 DeVille PCM Codes
  54. Cleaning an ISC motor from a 1989 Seville
  55. Water in oil - Head/intake maniforld gasket job
  56. Loud bang, car won't turn over. 4100 '82 Deville
  57. Coolant Leak
  58. A/C Compressor Clutch Engagement Issues
  59. 83 Eldo 4.1 Climate Control only lights sometimes
  60. 1989 Deville code help
  61. 1989 Deville code help
  62. 83 4.1 overheated, now, an ISC problem !
  63. car doesn't switch to 3rd gear
  64. Performance 4.9
  65. New Life
  66. 92 Deville 4.9 FPR
  67. plug wire routing conduit/loom
  68. Alternator Pulley
  69. 88 Sedan Deville 4.5L intermittently starts, sometimes dies driving
  70. gear indicator fault :(
  71. 4100 Fuel Problem - Advice Please...
  72. A/C Bypass Belt for 4.5L w/Calif Emissions
  73. i need advice from a tech!!!!!!
  74. HELP! 4.9 Missing and Dist. cap clicking!
  75. 85 eldo 4.1
  76. ht 4100 crankshaft flange 9Harmonic balancer) removal tool?
  77. Mystery drainage of radiator?
  78. Finally replacing 4.9 main bearings
  79. 4.9l stumble
  80. my 4.1 compression numbers
  81. A/C Bypass belt length for 4.9
  82. engine stopped while driving on highway, inside temp not right
  83. The worst gas miliage ever
  84. 86 Seville, 4.1, low idle in drive
  85. electrical diagram needed ASAP
  86. 4.5 questions
  87. 4.5 Miss under full throttle
  88. Reverse slipping?
  89. ignition!!!!!!!!
  90. 4.9 liter--replacing heater core "hoses".
  91. 1982 Deville check engine light
  92. Cruise Control Problem!!
  93. anyone know tps ranges
  94. stripped head bolt please help!!!!!
  95. 1992 Deville fails NOx emissions test
  96. Question Regarding '85 Eldo TPS Fix???
  97. Water Pump Inlet Repair help
  98. I'm afraid to buy these cars ....
  99. Another question - 89 Seville air conditioning leak
  100. 1989 Seville code E13 Oxygen sensor not ready
  101. 1987 - 1989 Fan Control Module
  102. 85 Seville HT4100
  103. How common is this?
  104. deville 4.5 and gm taps
  105. question engine deville 4.5
  106. 4.9 Unstable Idle
  107. torque converter portability
  108. 4.5 High Rev
  109. Oil Feed Pipe o-ring
  110. side gaped spark plugs on a 4.x
  111. 1994 Cadillac Deville,4.9L
  112. 4.9 reverse flow cooling
  113. 4.9L '93 Seville: How do I replace the pickup coil?
  114. All oil gaskets/seals on engine RH side
  115. 4.5 comparied to a 4.9
  116. Th-th-th-that's all folks!
  117. HT 4100 4.1 motor problems - giving up
  118. Power Steering Pum Removal on 4.9
  119. car took a dump today
  120. sings of a head gasket falure in a 4.5
  121. 4.5L engine runs rough
  122. Fuel Injection Cleaning?
  123. Fan Belt Upside Down on Ebay Car?
  124. 92 Cadillac Eldo AC Leak near the fire wall
  125. 4.9l Rpm
  126. 4.9 RWD 5 speed
  127. Can anyone interpert this A/C gauge reading??
  128. clamp-down dist caps
  129. In need of some numbers....
  130. Throttle body spacers on a 4.? engine
  131. HT4100 SES light @ low RPM, much stalling & near stalling
  132. 1992 4.9 injector replacement
  133. Need wiring diagrams.
  134. A/C refrig. temp. sensor question?
  135. Cannot getg into E.6.3 ISC Motor
  136. Sedan Deville 4.1 to 4.5 Disaster Swap “This time I’ll get right”
  137. Pain at the pump and the inspectors
  138. Your advice on the HT 4100 needed/appreciated
  139. 4.9L coolant leak
  140. high output alternator
  141. Have to pump gas pedal to get it to start, then it runs fine??
  142. 4.1 Spark Plug Wires Problem Solved (Maybe)
  143. Weak Battery + Hot Engine - Bad Alternator?
  144. Plug Gap on 4.9L??? (also Bosch Injector Question)
  145. where are the major grounding straps?
  146. I Have Codes... Can anyone interpret?
  147. "illumina" and other Gurus
  148. Fuel Type?
  149. 91 Deville Distributor Coil wiring diagram
  150. Head gasket maybe but hope not!
  151. 4.9 has irratic idle can you help
  152. '86 DeVille rear main seal
  153. where is this supposed to connect
  154. last problem with HT4100 (I hope)
  155. 92 Deville, accelerated on it's own. Friend kinda fixed it but now..
  156. 1991 Seville 4.9L Engine Stumble (TECH PLEASE)
  157. New throttle position sensor?
  158. New Transmission Fluid and Filter
  159. engine pinging off the line?
  160. radiator 1983 Eldorado refurb?
  161. 4.9 ticking when cold
  162. Stop Engine - Oil Light on 1988 4.5L V8
  163. 93 Started, now can't keep belt on
  164. engine pinging???
  165. no chime? cant' open gas lid?
  166. think these are the same parts?
  167. 4.5 Computer Tachometer
  168. Air cleaner cold start door
  169. The Surge - in my 4.9, not Iraq...
  170. 4.9 switched to 87 oct., hard starts, re-time?
  171. 92 deville sound at engine starts and stops
  172. 93 SD 4.9 Gurgling back into the overflow tank
  173. When you buy a remain. ecm, does it come already flashed?
  174. 93 Won't Start
  175. 93 Seville 4.9-Crank position sensor location?
  176. '93 Eldorado - Relays - ELC System
  177. Got new plugs/wires installed on 4.9 today.
  178. 93 deville "CHUNKing" while reved in park or nuetral.
  179. cost of tps
  180. latest 4.1 repairs
  181. 91 Caddy DeVille Sedan Belt
  182. 82 deville tranny problems
  183. 4.1 Question
  184. 1984 Fleetwood 4.1
  185. Trouble codes?
  186. I need a new throttle body
  187. 4.9 timing chain replacement ?
  188. Popular car... at the junkyard
  189. 4.9 swap
  190. Code E26 and E27
  191. 4100? worth rebuilding
  192. Need help finding power steering bracket
  193. 4.1 dampener pulley bolt
  194. ht4100- stop engine-oil pressure light flickers
  195. "The Cadillac 4.1 liter engine is beyond hope for this formula"
  196. 94 Deville won't start
  197. '94 Deville 4.9l torque conv. clutch prob?
  198. 1986 Eldorado stalls under stress
  199. 4.9's torque
  200. Right the wrongs in a 4.1 (4100)
  201. 4.9 engine
  202. 4.9 liter vanity cover removal.
  203. The Mythical 4.9 performance Chip
  204. 4.5 Liter - Last chance before I need to give it up.
  205. Possible ECM problem
  206. Got mother's 1985 Fleetwood Brougham with HT4100
  207. Member 92 Seville 89 - Old Threads
  208. Water Pump Tasks ahead
  209. wont start cold
  210. egr question
  211. Problem of the day :)
  212. 2002 DTS trouble
  213. 250 or 252?
  214. 4.9 isc adjustment: Thanks Ranger
  215. 4.5 engine swap
  216. Hall Effect
  217. How do you get to the back of the FDC
  218. 4100 RWD replacement source
  219. mechanical water temp guage
  220. deck height and bore spacing
  221. 88 4.5L Running rough
  222. 90 eldo-possible tranny issue and engine issue
  223. Exhaust Muffler
  224. 4.9 litre--flat tappet engine?
  225. 4.1 to 4.5
  226. New to Throttle Body Injection?
  227. Haynes or Chiltons
  228. 4100 Updated intake gasket set
  229. '93 Eldorado, 4.9L - Partial Fire, No Start
  230. How do you clean 4.5 throttle body?
  231. oil change
  232. Crazy Coolant Temperatures
  233. Mustard like substance in radiator
  234. Help my 91 cadilliac deville 4.9
  235. Two Problems Not Starting and Stalling
  236. 4.9 water pump
  237. Broken Upper Radiator Hose Connector
  238. 1994 Sedan Deville questions...
  239. Piston 6 hits sparkplug - Bad timing
  240. Coupe Deville 4.5 Rough Running
  241. new and need some help please!!!!!
  242. What should I do, buy or walk? 89 Coupe Deville
  243. E20 - Open Fuel Pump Circut Feedback Signal
  244. 4.1 Running Bad Again
  245. 4.5 Allante Intake on a 4.9 Eldorado
  246. heat issues!!!!
  247. Need Help ASAP!!!!!!
  248. Lound thump when shutting off engine, then no restart
  249. 4.9 Oil Filter ??
  250. 4.9 and spark knock