: HT4100 4.1, 4.5, 4.9



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  1. Bad alternator in 93 Deville, need help
  2. Restore Lubricants
  3. Bad Head Gasket 92 DeVille 4.9- Need opinion
  4. Throttle Position Sensor Misadjusted
  5. A.I.R. Pump 4.5l '89 Deville
  6. temp sensor
  7. Don't ask oil questions on this site.
  8. 1985 deville died
  9. where do i go from here
  10. Need Help On Two More Things
  11. serious help needed
  12. 1983 Caddy transmission
  13. Strange Timing Issues
  14. Mobil 1 10W30
  15. 1985 Deville with a 4100 and it will not crank
  16. 1985 Deville with a 4100 and it will not crank
  17. Code E48 diagnosis
  18. codes ???please help
  19. 4.5 Allante intake on 93 4.9 deville
  20. New Trouble Code
  21. 1989 Caddy Deville......
  22. Throttle Body Plate issue
  23. Code and Coolant Prob.
  24. Low oil pressure!
  25. Oil Cooler Lines Leaking
  26. 1989 Caddy Deville......help!!!
  27. Stallling at idle
  28. gas pedal
  29. 4.5 TBI rough idle
  30. 94 Deville has almost no power from start
  31. 84 eldo conv't - 70 weight oil - yes or no?
  32. E012,E053 Won't run
  33. 1990 Seville Timing chain?
  34. 4.9 groaning
  35. '84 Eldo Code 44
  36. HT-4500 Starting trouble
  37. Speedometer Sensor issue ?
  38. The Ultimate FWD Cadillac Engine Swap
  39. Sticky Gas Pedal...4.5L
  40. Underhood smoking... need help with a diagnosis
  41. Fixed EGR now MPG is lower
  42. engin and trany swap for an 85 coupe deville
  43. Favorite things about the 4.9?
  44. 86 EGR Valve
  45. 4.5 TBI smoking
  46. Fuel pump on 4.9 92 Deville
  47. Fleetwood/DeVille Speedometer
  48. 4.1 Knock?? Or Tap??
  49. 1990 deville 4.5 air pump noisy
  50. 4.5L TBI Grumbling
  51. HT4500 and 4900 series Performance
  52. 4.1L injector
  53. how to get more hp from a 4100
  54. Intermittent Lurch—91 DeVille 4.9
  55. MAP Problems
  56. Oil Level
  57. How to start when very cold (less than 0 F)
  58. Need Help Please
  59. Engine surges at slow speed
  60. Stop Engine, Low Oil Pressure
  61. 1988 Fleetwood 4.5 Distributor order
  62. 1985 Seville Power Steering Pulley bolt
  63. Installing oil pump in 4.9 engine.
  64. 1985 deville ht4100 jump start
  65. GM Top End Cleaner Has Been Discontinued
  66. Makes Me Happy!
  67. HT4100 Question
  68. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  69. Makes me nervous!
  70. 4.9 E55 code. TPS?
  71. Thoughts on the 4.5
  72. power steering leakk
  73. The SEA FOAM experience thread.
  74. Oh just great, a collapsed lifter in #1 cylinder!!
  75. 94 4.9 bypass siezed A/C compressor
  76. 85 Deville Still Has Poor Performance
  77. Need exhaust manifolds 4.1 HT4100
  78. 93 Deville stalls after car warms up
  79. New Caddy Owner, Need Some Help
  80. Rattle Under Car
  81. What kind of ISC motor should i get?
  82. 84 eldorado fuse panel pictures?
  83. Crack in my Block
  84. 93 DeVille AC converter clutch bypass ???
  85. Cooling System - Water Pump Conditioner/Anti-Rust
  86. Stock Exhaust dimensions on 93 Devilles
  87. Campaign 95-C-72 (recall)
  88. fuel pressure????
  89. Just finished my 4.9 Water pump repair pics inside
  90. 4.9L Rear Oil Leak
  91. Quick question: Ignition Control Module
  92. Disaster
  93. EGR Valve
  94. 4.1 main bearing thump
  95. Tranny problems, E39!! Please help, dont want to rebuild...
  96. 95 Deville 4.9 need help
  97. OMG water pump problem!
  98. Bypass Catalytic Converter on 1993 Deville?
  99. Starter motor gone on 87 deville 4.1
  100. Need help 4.9 L Fuel Delivery problem
  101. 92 4.9 DeVille runs horrible, sets codes
  102. Roller Lifters On The 4.9?
  103. water pump change on 4.1ltr
  104. 93 deville
  105. 1993 Cadillac Seville: Please Help starting problem
  106. Bad coil?
  107. Rebuilding a tbi on 89 deville
  108. I Broke it
  109. 4.9 Surges After Hot Start
  110. Poor mileage and slighly high HC levels
  111. engine oil cooler lines
  112. Smoke out of exhaust
  113. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  114. code help
  115. Low mileage 4.9 Idling Rough Engine Sputters and quits
  116. First time Caddy owner needs some advice please
  117. Trouble with diagnostics
  118. changing oil pump in 90 deville 4.5
  119. Help I dont want to get rid of my car BUT!
  120. Has anyone changed their catalytic converter?
  121. 4.9 Liter idle
  122. Removing hydraulic fittings
  123. How many miles on the 4.9? ?
  124. 88 Sedan Deville not liking the winter
  125. Coolant hose to blower motor
  126. Timing Question
  127. '84 Eldorado blown head gasket?
  128. Oil pan heater?
  129. 4.9 Deville 95 whining noise like supercharger..
  130. Location of the CAM Position Sensor on the 95 4.9L deville?
  131. YES, i did it!!! All went well!
  132. 92 Eldo 4.9 for sale
  133. 4.5 water pump
  134. 93 4.9 STS wont start
  135. DESPERATELY Need Help!!! 85 CDV
  136. Trying to find good price on Allante gear reduction to use on my 4.9
  137. How to clean out EGR valves and throttle body?
  138. time for engine replacement soon-- help!
  139. Heater
  140. Hard starting
  141. 4.5 differences
  142. E98 rectification
  143. 87 fleetwood new ignition problem
  144. 1985 deville 4.1 Injector fuse keeps blowing
  145. PCM override, PS10
  146. EGR solenoid, is it normal?
  147. Get a LARGER capacity, 3 row radiator?
  148. Smoky when at full throttle!
  149. What does the code F.8.5 mean?
  150. 87 fleetwood 4.1 three problems,advice please!
  151. Removed Distributor--Question Before I Restart
  152. Changed the oil pump, lifter still taps on occasion warmed up..
  153. 87 deville, E48, EGR system problem
  154. Additive for newly remaned 86 DeVille Trans??
  155. Is it possible for a 4.9 main bearing thump to get progressively worse?
  156. 1989 Sedandeville issues
  157. 15W-40 Oil .....
  158. Fuel
  159. 82 eldorado alternator bracket
  160. 85 Deville ISC Problem--Might Have the Answer
  161. Help me Please!!!
  162. Weird idea
  163. Engine miss
  164. Pulled a thread
  165. E12 - No Distributor Signal???
  166. computer interchange, '90 Seville?
  167. Where Can I get some chips......
  168. Oil leak source...?
  169. well, i did it but...
  170. HT4100 ECM/BCM Problem?!
  171. #$$%^%@#$% damn .....floods on hot restart
  172. can't flush out "rubber glue type" coolant additive... what to do?
  173. Transmission Shift cable
  174. HT4100 ISC Help
  175. 4t60-E going out
  176. Fuel Issues - Please Help!
  177. 4t60-E FDR and the computer
  178. Fixed my car! Need help on one more thing...
  179. What's wrong with my car? The mystery continues...
  180. When i go to replace the mains....
  181. 4t60-E Shudder?
  182. last year
  183. All 4.x engine service parts are discontinued?
  184. Does anybody have a spare 4.9?
  185. Knock, Knock, Knock, 4.9L
  186. Alright, i'm going in!! I need a few parts and info please.
  187. 90 4.5L Idle Learn Procedure?
  188. I have a slight problem,,, HT4100
  189. Fuel Pressure Test Fitting
  190. 1985 Seville code e15
  191. Cooling Fan Module--Where can I get one?
  192. Bars Leaks Head Gasket Repair
  193. Code E30 on 85 Deville and Vacuum Pumps
  194. Copper Gaskets?
  195. Battery/ALternator area cracking noise?
  196. Oil Analysis: Proof is in the results
  197. 1992 Eldo
  198. That Funky Emissions Tubing
  199. Hey Guys long time no chat, and long time not wanting to start either.
  200. The once a year survival kit for the 4.X series
  201. 4.9 runs rough black exhaust from tail pipe
  202. 1985 Seville harsh shifting tranny
  203. Odd brief buzzing noise from undercarriage
  204. i need a 4t60e guru; i am hating mine
  205. what is up with my car
  206. Early vs. Late 1985 FWD 4100
  207. Strange ISC
  208. 1994 cadillac deville engine knocks when warm
  209. 4.5 --> 4.9
  210. Getting ready for water pump removal
  211. 1988 Eldorado 4.5
  212. 1985 FWD HT4100 Running rough
  213. Question about spark plugs!
  214. TPS problem?
  215. 4100 Mpg
  216. 87 deville 4100 shift problems
  217. 1991 DeVille Speedometer/Transmission Trouble.
  218. Starter solenoid replacement
  219. 4.9 Injector Replacement Questions
  220. 92 STS error code A048 what does that mean?
  221. 1994 Deville 4.9 Idler pulleys
  222. Please Help!!! Rough running 4.9 , Help!!
  223. 1994 Deville 4.9 spark knock
  224. 85 Sedan Deville Stalls after 20 Miles
  225. 4.9 Potential? (Split from "4.9 to a 5.0?")
  226. 94 Deville 4.9 switching complete sending/fuel pumps
  227. 4.9 to a 5.0?
  228. Fan Runs all the time on 4.9, engine runs real cold
  229. AHHH HELP!!! Keep overheating
  230. 4.5 Vs. 4.9
  231. Fuel Mileage vs. Data Center
  232. 92 4.9 flat cam?
  233. Does twitchy tach mean misfire?
  234. ht 4100 Hesitation
  235. 1987 SDV 4.1 L V-8 Available
  236. 89 4.5 TPS installations
  237. 89 Fleetword code (30) ISC Circuit
  238. Boiling coolant, fans not running, ...
  239. no start after warm engine
  240. 1989 4.5 Idle Speed Motor
  241. 1989 Fleetwood Idle Speed Motor
  242. Valve Adjustment 4.9 Engine
  243. remaned 4.1/4.5 short block
  244. 4100 to LT1 swap 83 Coupe Deville
  245. Cylinder head removal
  246. Very poor MPG 1992 Deville ?? HELP!!??!!
  247. turn your 4.9 into a performance engine
  248. engine system fault E046
  249. Take a look at this.
  250. 4.9 exhaust manifold crack, common?