: HT4100 4.1, 4.5, 4.9



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  1. 92 seville 4.9L engine problem
  2. alternator question
  3. Odd "Cold" Idle
  4. Rotten 4.1 do they just normally overheat ???
  5. Starter Change
  6. 83 Eldorado No power to HVAC controls or Mileage calculator
  7. Cam position sensor replacement
  8. A.L.D.L connector, setting timing
  9. The 93 SDV is dead!
  10. 1989 Seville Transmission shifts - Vac Modulator?
  11. thinking about 1994 Sedan deville
  12. Will there be a mess
  13. 1990 Eldorado runs ruff
  14. The 6 flexplate to crankshaft bolts
  15. Coolant
  16. Well, found one of my oil leaks...
  17. 92 Deville Shuts of suddenly
  18. Exhaust manifold gasket set
  19. Fuel Pump Cheat?
  20. 1995 Devile 4.9 Oil Leak
  21. Found my oil-leak
  22. Check this guy out: 91 Seville with 'questionable' mods
  23. Hose substution
  24. Thermostat
  25. Which of these?
  26. New Performance 4.9 Injector Mod. and Adjustable Fuel Pressure Regulator
  27. 1994 Cadillac Deville High Idle
  28. 91 deville, dead miss
  29. heater controls 92 eldo.
  30. How many tablets or bars leak?
  31. Distributor Help
  32. Proper Spark Plug Gap for 4.5
  33. 1990 Deville 4.5 help
  34. Yes, I Did It
  35. Harmonic Balance
  36. ECM Swap! PASSkey Question...
  37. Accel Performance Ignition Module: Real or B/S?
  38. 4100 engine temperature
  39. '90 4.5 No Cam Sensor Reference Signal Journey Through Hell!
  40. Ongoing Issues, running rough poor idle
  41. Trans cooler flush
  42. screw the whole thing - i hate the 4100... swap ideas?
  43. oil sender location - 4.1
  44. code po23??? Any thoughts
  45. 4.9 exhaust info
  46. Throttle valve cable '85
  47. oil pressure light came on - towed home
  48. clackin noise 4.9 deville
  49. Oil-leak solved!
  50. WOW this is a 4.9
  51. PO48 Current/ EGR Fault
  52. Oil Pressure
  53. E98 code on 4.5
  54. ...the HG gremlin got me
  55. Help identify 4.9 engine noise (video included)
  56. Head Gasket 91 caddy
  57. Once again......no joy
  58. BCM Location?
  59. Oil-tube gasket & o-ring
  60. 84 cdv 4100
  61. Question on oil leak - 1989 Seville
  62. No Joy....
  63. RTV on Oil-Pan gasket
  64. Block number?
  65. One problem fixed another shows up. Starter
  66. 4.9 Software
  67. How do I bypass PASKEY
  68. Rough running, bad mileage, unstable idle
  69. Trouble Starting When Warm
  70. Clattering noise from engine front area
  71. What is this hose called???
  72. 83 Eldorado 4.1 auto OD Trans Model # Please
  73. 1986 deville 4.1L
  74. Sedan Deville 4.1 to 4.5 Disaster Swap “This time I got right” part 2
  75. 89 Seville ignition switch click - VATS?
  76. Which a/c compressor to buy for round 4...advice please
  77. Carnut, got it to work, Thanks !
  78. wont start when warm
  79. B336 code, 86 seville
  80. transmission parts and specks
  81. Transmission advice
  82. 4.5-4.9 less inclined for h.g. problems
  83. Transmission Cooler Lines
  84. Severs Idle Problem
  85. 83 Eldo 4.1 Hesitation upon accelleration
  86. Coolant Change and GM Sealant Questions
  87. 95 DeVille PCM Codes
  88. Cleaning an ISC motor from a 1989 Seville
  89. Water in oil - Head/intake maniforld gasket job
  90. Loud bang, car won't turn over. 4100 '82 Deville
  91. Coolant Leak
  92. A/C Compressor Clutch Engagement Issues
  93. 83 Eldo 4.1 Climate Control only lights sometimes
  94. 1989 Deville code help
  95. 1989 Deville code help
  96. 83 4.1 overheated, now, an ISC problem !
  97. car doesn't switch to 3rd gear
  98. Performance 4.9
  99. New Life
  100. 92 Deville 4.9 FPR
  101. plug wire routing conduit/loom
  102. Alternator Pulley
  103. 88 Sedan Deville 4.5L intermittently starts, sometimes dies driving
  104. gear indicator fault :(
  105. 4100 Fuel Problem - Advice Please...
  106. A/C Bypass Belt for 4.5L w/Calif Emissions
  107. i need advice from a tech!!!!!!
  108. HELP! 4.9 Missing and Dist. cap clicking!
  109. 85 eldo 4.1
  110. ht 4100 crankshaft flange 9Harmonic balancer) removal tool?
  111. Mystery drainage of radiator?
  112. Finally replacing 4.9 main bearings
  113. 4.9l stumble
  114. my 4.1 compression numbers
  115. A/C Bypass belt length for 4.9
  116. engine stopped while driving on highway, inside temp not right
  117. The worst gas miliage ever
  118. 86 Seville, 4.1, low idle in drive
  119. electrical diagram needed ASAP
  120. 4.5 questions
  121. 4.5 Miss under full throttle
  122. Reverse slipping?
  123. ignition!!!!!!!!
  124. 4.9 liter--replacing heater core "hoses".
  125. 1982 Deville check engine light
  126. Cruise Control Problem!!
  127. anyone know tps ranges
  128. stripped head bolt please help!!!!!
  129. 1992 Deville fails NOx emissions test
  130. Question Regarding '85 Eldo TPS Fix???
  131. Water Pump Inlet Repair help
  132. I'm afraid to buy these cars ....
  133. Another question - 89 Seville air conditioning leak
  134. 1989 Seville code E13 Oxygen sensor not ready
  135. 1987 - 1989 Fan Control Module
  136. 85 Seville HT4100
  137. How common is this?
  138. deville 4.5 and gm taps
  139. question engine deville 4.5
  140. 4.9 Unstable Idle
  141. torque converter portability
  142. 4.5 High Rev
  143. Oil Feed Pipe o-ring
  144. side gaped spark plugs on a 4.x
  145. 1994 Cadillac Deville,4.9L
  146. 4.9 reverse flow cooling
  147. 4.9L '93 Seville: How do I replace the pickup coil?
  148. All oil gaskets/seals on engine RH side
  149. 4.5 comparied to a 4.9
  150. Th-th-th-that's all folks!
  151. HT 4100 4.1 motor problems - giving up
  152. Power Steering Pum Removal on 4.9
  153. car took a dump today
  154. sings of a head gasket falure in a 4.5
  155. 4.5L engine runs rough
  156. Fuel Injection Cleaning?
  157. Fan Belt Upside Down on Ebay Car?
  158. 92 Cadillac Eldo AC Leak near the fire wall
  159. 4.9l Rpm
  160. 4.9 RWD 5 speed
  161. Can anyone interpert this A/C gauge reading??
  162. clamp-down dist caps
  163. In need of some numbers....
  164. Throttle body spacers on a 4.? engine
  165. HT4100 SES light @ low RPM, much stalling & near stalling
  166. 1992 4.9 injector replacement
  167. Need wiring diagrams.
  168. A/C refrig. temp. sensor question?
  169. Cannot getg into E.6.3 ISC Motor
  170. Sedan Deville 4.1 to 4.5 Disaster Swap “This time I’ll get right”
  171. Pain at the pump and the inspectors
  172. Your advice on the HT 4100 needed/appreciated
  173. 4.9L coolant leak
  174. high output alternator
  175. Have to pump gas pedal to get it to start, then it runs fine??
  176. 4.1 Spark Plug Wires Problem Solved (Maybe)
  177. Weak Battery + Hot Engine - Bad Alternator?
  178. Plug Gap on 4.9L??? (also Bosch Injector Question)
  179. where are the major grounding straps?
  180. I Have Codes... Can anyone interpret?
  181. "illumina" and other Gurus
  182. Fuel Type?
  183. 91 Deville Distributor Coil wiring diagram
  184. Head gasket maybe but hope not!
  185. 4.9 has irratic idle can you help
  186. '86 DeVille rear main seal
  187. where is this supposed to connect
  188. last problem with HT4100 (I hope)
  189. 92 Deville, accelerated on it's own. Friend kinda fixed it but now..
  190. 1991 Seville 4.9L Engine Stumble (TECH PLEASE)
  191. New throttle position sensor?
  192. New Transmission Fluid and Filter
  193. engine pinging off the line?
  194. radiator 1983 Eldorado refurb?
  195. 4.9 ticking when cold
  196. Stop Engine - Oil Light on 1988 4.5L V8
  197. 93 Started, now can't keep belt on
  198. engine pinging???
  199. no chime? cant' open gas lid?
  200. think these are the same parts?
  201. 4.5 Computer Tachometer
  202. Air cleaner cold start door
  203. The Surge - in my 4.9, not Iraq...
  204. 4.9 switched to 87 oct., hard starts, re-time?
  205. 92 deville sound at engine starts and stops
  206. 93 SD 4.9 Gurgling back into the overflow tank
  207. When you buy a remain. ecm, does it come already flashed?
  208. 93 Won't Start
  209. 93 Seville 4.9-Crank position sensor location?
  210. '93 Eldorado - Relays - ELC System
  211. Got new plugs/wires installed on 4.9 today.
  212. 93 deville "CHUNKing" while reved in park or nuetral.
  213. cost of tps
  214. latest 4.1 repairs
  215. 91 Caddy DeVille Sedan Belt
  216. 82 deville tranny problems
  217. 4.1 Question
  218. 1984 Fleetwood 4.1
  219. Trouble codes?
  220. I need a new throttle body
  221. 4.9 timing chain replacement ?
  222. Popular car... at the junkyard
  223. 4.9 swap
  224. Code E26 and E27
  225. 4100? worth rebuilding
  226. Need help finding power steering bracket
  227. 4.1 dampener pulley bolt
  228. ht4100- stop engine-oil pressure light flickers
  229. "The Cadillac 4.1 liter engine is beyond hope for this formula"
  230. 94 Deville won't start
  231. '94 Deville 4.9l torque conv. clutch prob?
  232. 1986 Eldorado stalls under stress
  233. 4.9's torque
  234. Right the wrongs in a 4.1 (4100)
  235. 4.9 engine
  236. 4.9 liter vanity cover removal.
  237. The Mythical 4.9 performance Chip
  238. 4.5 Liter - Last chance before I need to give it up.
  239. Possible ECM problem
  240. Got mother's 1985 Fleetwood Brougham with HT4100
  241. Member 92 Seville 89 - Old Threads
  242. Water Pump Tasks ahead
  243. wont start cold
  244. egr question
  245. Problem of the day :)
  246. 2002 DTS trouble
  247. 250 or 252?
  248. 4.9 isc adjustment: Thanks Ranger
  249. 4.5 engine swap
  250. Hall Effect