: HT4100 4.1, 4.5, 4.9



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  1. Your opinion of the 4.5L V8 in the 88 DeVille
  2. oil
  3. Tranny Slipping?
  4. part identification 4.9
  5. 1992 seville 4.9 fuel filter location
  6. Good old 83' Coupe Deville
  7. new cadillac seville owner coolant flush
  8. 1993 Deville power steering pump failure
  9. ECM software
  10. 130 mph in a 4.9!
  11. Frozen Pulley
  12. Ignition Module issue
  13. Removing EGR valve - 4100
  14. Bad alternator in 93 Deville, need help
  15. Restore Lubricants
  16. Bad Head Gasket 92 DeVille 4.9- Need opinion
  17. Throttle Position Sensor Misadjusted
  18. A.I.R. Pump 4.5l '89 Deville
  19. temp sensor
  20. Don't ask oil questions on this site.
  21. 1985 deville died
  22. where do i go from here
  23. Need Help On Two More Things
  24. serious help needed
  25. 1983 Caddy transmission
  26. Strange Timing Issues
  27. Mobil 1 10W30
  28. 1985 Deville with a 4100 and it will not crank
  29. 1985 Deville with a 4100 and it will not crank
  30. Code E48 diagnosis
  31. codes ???please help
  32. 4.5 Allante intake on 93 4.9 deville
  33. New Trouble Code
  34. 1989 Caddy Deville......
  35. Throttle Body Plate issue
  36. Code and Coolant Prob.
  37. Low oil pressure!
  38. Oil Cooler Lines Leaking
  39. 1989 Caddy Deville......help!!!
  40. Stallling at idle
  41. gas pedal
  42. 4.5 TBI rough idle
  43. 94 Deville has almost no power from start
  44. 84 eldo conv't - 70 weight oil - yes or no?
  45. E012,E053 Won't run
  46. 1990 Seville Timing chain?
  47. 4.9 groaning
  48. '84 Eldo Code 44
  49. HT-4500 Starting trouble
  50. Speedometer Sensor issue ?
  51. The Ultimate FWD Cadillac Engine Swap
  52. Sticky Gas Pedal...4.5L
  53. Underhood smoking... need help with a diagnosis
  54. Fixed EGR now MPG is lower
  55. engin and trany swap for an 85 coupe deville
  56. Favorite things about the 4.9?
  57. 86 EGR Valve
  58. 4.5 TBI smoking
  59. Fuel pump on 4.9 92 Deville
  60. Fleetwood/DeVille Speedometer
  61. 4.1 Knock?? Or Tap??
  62. 1990 deville 4.5 air pump noisy
  63. 4.5L TBI Grumbling
  64. HT4500 and 4900 series Performance
  65. 4.1L injector
  66. how to get more hp from a 4100
  67. Intermittent Lurch—91 DeVille 4.9
  68. MAP Problems
  69. Oil Level
  70. How to start when very cold (less than 0 F)
  71. Need Help Please
  72. Engine surges at slow speed
  73. Stop Engine, Low Oil Pressure
  74. 1988 Fleetwood 4.5 Distributor order
  75. 1985 Seville Power Steering Pulley bolt
  76. Installing oil pump in 4.9 engine.
  77. 1985 deville ht4100 jump start
  78. GM Top End Cleaner Has Been Discontinued
  79. Makes Me Happy!
  80. HT4100 Question
  81. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  82. Makes me nervous!
  83. 4.9 E55 code. TPS?
  84. Thoughts on the 4.5
  85. power steering leakk
  86. The SEA FOAM experience thread.
  87. Oh just great, a collapsed lifter in #1 cylinder!!
  88. 94 4.9 bypass siezed A/C compressor
  89. 85 Deville Still Has Poor Performance
  90. Need exhaust manifolds 4.1 HT4100
  91. 93 Deville stalls after car warms up
  92. New Caddy Owner, Need Some Help
  93. Rattle Under Car
  94. What kind of ISC motor should i get?
  95. 84 eldorado fuse panel pictures?
  96. Crack in my Block
  97. 93 DeVille AC converter clutch bypass ???
  98. Cooling System - Water Pump Conditioner/Anti-Rust
  99. Stock Exhaust dimensions on 93 Devilles
  100. Campaign 95-C-72 (recall)
  101. fuel pressure????
  102. Just finished my 4.9 Water pump repair pics inside
  103. 4.9L Rear Oil Leak
  104. Quick question: Ignition Control Module
  105. Disaster
  106. EGR Valve
  107. 4.1 main bearing thump
  108. Tranny problems, E39!! Please help, dont want to rebuild...
  109. 95 Deville 4.9 need help
  110. OMG water pump problem!
  111. Bypass Catalytic Converter on 1993 Deville?
  112. Starter motor gone on 87 deville 4.1
  113. Need help 4.9 L Fuel Delivery problem
  114. 92 4.9 DeVille runs horrible, sets codes
  115. Roller Lifters On The 4.9?
  116. water pump change on 4.1ltr
  117. 93 deville
  118. 1993 Cadillac Seville: Please Help starting problem
  119. Bad coil?
  120. Rebuilding a tbi on 89 deville
  121. I Broke it
  122. 4.9 Surges After Hot Start
  123. Poor mileage and slighly high HC levels
  124. engine oil cooler lines
  125. Smoke out of exhaust
  126. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  127. code help
  128. Low mileage 4.9 Idling Rough Engine Sputters and quits
  129. First time Caddy owner needs some advice please
  130. Trouble with diagnostics
  131. changing oil pump in 90 deville 4.5
  132. Help I dont want to get rid of my car BUT!
  133. Has anyone changed their catalytic converter?
  134. 4.9 Liter idle
  135. Removing hydraulic fittings
  136. How many miles on the 4.9? ?
  137. 88 Sedan Deville not liking the winter
  138. Coolant hose to blower motor
  139. Timing Question
  140. '84 Eldorado blown head gasket?
  141. Oil pan heater?
  142. 4.9 Deville 95 whining noise like supercharger..
  143. Location of the CAM Position Sensor on the 95 4.9L deville?
  144. YES, i did it!!! All went well!
  145. 92 Eldo 4.9 for sale
  146. 4.5 water pump
  147. 93 4.9 STS wont start
  148. DESPERATELY Need Help!!! 85 CDV
  149. Trying to find good price on Allante gear reduction to use on my 4.9
  150. How to clean out EGR valves and throttle body?
  151. time for engine replacement soon-- help!
  152. Heater
  153. Hard starting
  154. 4.5 differences
  155. E98 rectification
  156. 87 fleetwood new ignition problem
  157. 1985 deville 4.1 Injector fuse keeps blowing
  158. PCM override, PS10
  159. EGR solenoid, is it normal?
  160. Get a LARGER capacity, 3 row radiator?
  161. Smoky when at full throttle!
  162. What does the code F.8.5 mean?
  163. 87 fleetwood 4.1 three problems,advice please!
  164. Removed Distributor--Question Before I Restart
  165. Changed the oil pump, lifter still taps on occasion warmed up..
  166. 87 deville, E48, EGR system problem
  167. Additive for newly remaned 86 DeVille Trans??
  168. Is it possible for a 4.9 main bearing thump to get progressively worse?
  169. 1989 Sedandeville issues
  170. 15W-40 Oil .....
  171. Fuel
  172. 82 eldorado alternator bracket
  173. 85 Deville ISC Problem--Might Have the Answer
  174. Help me Please!!!
  175. Weird idea
  176. Engine miss
  177. Pulled a thread
  178. E12 - No Distributor Signal???
  179. computer interchange, '90 Seville?
  180. Where Can I get some chips......
  181. Oil leak source...?
  182. well, i did it but...
  183. HT4100 ECM/BCM Problem?!
  184. #$$%^%@#$% damn .....floods on hot restart
  185. can't flush out "rubber glue type" coolant additive... what to do?
  186. Transmission Shift cable
  187. HT4100 ISC Help
  188. 4t60-E going out
  189. Fuel Issues - Please Help!
  190. 4t60-E FDR and the computer
  191. Fixed my car! Need help on one more thing...
  192. What's wrong with my car? The mystery continues...
  193. When i go to replace the mains....
  194. 4t60-E Shudder?
  195. last year
  196. All 4.x engine service parts are discontinued?
  197. Does anybody have a spare 4.9?
  198. Knock, Knock, Knock, 4.9L
  199. Alright, i'm going in!! I need a few parts and info please.
  200. 90 4.5L Idle Learn Procedure?
  201. I have a slight problem,,, HT4100
  202. Fuel Pressure Test Fitting
  203. 1985 Seville code e15
  204. Cooling Fan Module--Where can I get one?
  205. Bars Leaks Head Gasket Repair
  206. Code E30 on 85 Deville and Vacuum Pumps
  207. Copper Gaskets?
  208. Battery/ALternator area cracking noise?
  209. Oil Analysis: Proof is in the results
  210. 1992 Eldo
  211. That Funky Emissions Tubing
  212. Hey Guys long time no chat, and long time not wanting to start either.
  213. The once a year survival kit for the 4.X series
  214. 4.9 runs rough black exhaust from tail pipe
  215. 1985 Seville harsh shifting tranny
  216. Odd brief buzzing noise from undercarriage
  217. i need a 4t60e guru; i am hating mine
  218. what is up with my car
  219. Early vs. Late 1985 FWD 4100
  220. Strange ISC
  221. 1994 cadillac deville engine knocks when warm
  222. 4.5 --> 4.9
  223. Getting ready for water pump removal
  224. 1988 Eldorado 4.5
  225. 1985 FWD HT4100 Running rough
  226. Question about spark plugs!
  227. TPS problem?
  228. 4100 Mpg
  229. 87 deville 4100 shift problems
  230. 1991 DeVille Speedometer/Transmission Trouble.
  231. Starter solenoid replacement
  232. 4.9 Injector Replacement Questions
  233. 92 STS error code A048 what does that mean?
  234. 1994 Deville 4.9 Idler pulleys
  235. Please Help!!! Rough running 4.9 , Help!!
  236. 1994 Deville 4.9 spark knock
  237. 85 Sedan Deville Stalls after 20 Miles
  238. 4.9 Potential? (Split from "4.9 to a 5.0?")
  239. 94 Deville 4.9 switching complete sending/fuel pumps
  240. 4.9 to a 5.0?
  241. Fan Runs all the time on 4.9, engine runs real cold
  242. AHHH HELP!!! Keep overheating
  243. 4.5 Vs. 4.9
  244. Fuel Mileage vs. Data Center
  245. 92 4.9 flat cam?
  246. Does twitchy tach mean misfire?
  247. ht 4100 Hesitation
  248. 1987 SDV 4.1 L V-8 Available
  249. 89 4.5 TPS installations
  250. 89 Fleetword code (30) ISC Circuit