: HT4100 4.1, 4.5, 4.9



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  1. What senses the RPM on HT4100 engines?
  2. Open Throttle Switch Signal E27
  3. 83 FWB Idle Problems
  4. Got a code do not know what or where to check
  5. weird SES and hard start problem
  6. Sputtering, loss of power when hot
  7. Your opinion of the 4.5L V8 in the 88 DeVille
  8. oil
  9. Tranny Slipping?
  10. part identification 4.9
  11. 1992 seville 4.9 fuel filter location
  12. Good old 83' Coupe Deville
  13. new cadillac seville owner coolant flush
  14. 1993 Deville power steering pump failure
  15. ECM software
  16. 130 mph in a 4.9!
  17. Frozen Pulley
  18. Ignition Module issue
  19. Removing EGR valve - 4100
  20. Bad alternator in 93 Deville, need help
  21. Restore Lubricants
  22. Bad Head Gasket 92 DeVille 4.9- Need opinion
  23. Throttle Position Sensor Misadjusted
  24. A.I.R. Pump 4.5l '89 Deville
  25. temp sensor
  26. Don't ask oil questions on this site.
  27. 1985 deville died
  28. where do i go from here
  29. Need Help On Two More Things
  30. serious help needed
  31. 1983 Caddy transmission
  32. Strange Timing Issues
  33. Mobil 1 10W30
  34. 1985 Deville with a 4100 and it will not crank
  35. 1985 Deville with a 4100 and it will not crank
  36. Code E48 diagnosis
  37. codes ???please help
  38. 4.5 Allante intake on 93 4.9 deville
  39. New Trouble Code
  40. 1989 Caddy Deville......
  41. Throttle Body Plate issue
  42. Code and Coolant Prob.
  43. Low oil pressure!
  44. Oil Cooler Lines Leaking
  45. 1989 Caddy Deville......help!!!
  46. Stallling at idle
  47. gas pedal
  48. 4.5 TBI rough idle
  49. 94 Deville has almost no power from start
  50. 84 eldo conv't - 70 weight oil - yes or no?
  51. E012,E053 Won't run
  52. 1990 Seville Timing chain?
  53. 4.9 groaning
  54. '84 Eldo Code 44
  55. HT-4500 Starting trouble
  56. Speedometer Sensor issue ?
  57. The Ultimate FWD Cadillac Engine Swap
  58. Sticky Gas Pedal...4.5L
  59. Underhood smoking... need help with a diagnosis
  60. Fixed EGR now MPG is lower
  61. engin and trany swap for an 85 coupe deville
  62. Favorite things about the 4.9?
  63. 86 EGR Valve
  64. 4.5 TBI smoking
  65. Fuel pump on 4.9 92 Deville
  66. Fleetwood/DeVille Speedometer
  67. 4.1 Knock?? Or Tap??
  68. 1990 deville 4.5 air pump noisy
  69. 4.5L TBI Grumbling
  70. HT4500 and 4900 series Performance
  71. 4.1L injector
  72. how to get more hp from a 4100
  73. Intermittent Lurch—91 DeVille 4.9
  74. MAP Problems
  75. Oil Level
  76. How to start when very cold (less than 0 F)
  77. Need Help Please
  78. Engine surges at slow speed
  79. Stop Engine, Low Oil Pressure
  80. 1988 Fleetwood 4.5 Distributor order
  81. 1985 Seville Power Steering Pulley bolt
  82. Installing oil pump in 4.9 engine.
  83. 1985 deville ht4100 jump start
  84. GM Top End Cleaner Has Been Discontinued
  85. Makes Me Happy!
  86. HT4100 Question
  87. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  88. Makes me nervous!
  89. 4.9 E55 code. TPS?
  90. Thoughts on the 4.5
  91. power steering leakk
  92. The SEA FOAM experience thread.
  93. Oh just great, a collapsed lifter in #1 cylinder!!
  94. 94 4.9 bypass siezed A/C compressor
  95. 85 Deville Still Has Poor Performance
  96. Need exhaust manifolds 4.1 HT4100
  97. 93 Deville stalls after car warms up
  98. New Caddy Owner, Need Some Help
  99. Rattle Under Car
  100. What kind of ISC motor should i get?
  101. 84 eldorado fuse panel pictures?
  102. Crack in my Block
  103. 93 DeVille AC converter clutch bypass ???
  104. Cooling System - Water Pump Conditioner/Anti-Rust
  105. Stock Exhaust dimensions on 93 Devilles
  106. Campaign 95-C-72 (recall)
  107. fuel pressure????
  108. Just finished my 4.9 Water pump repair pics inside
  109. 4.9L Rear Oil Leak
  110. Quick question: Ignition Control Module
  111. Disaster
  112. EGR Valve
  113. 4.1 main bearing thump
  114. Tranny problems, E39!! Please help, dont want to rebuild...
  115. 95 Deville 4.9 need help
  116. OMG water pump problem!
  117. Bypass Catalytic Converter on 1993 Deville?
  118. Starter motor gone on 87 deville 4.1
  119. Need help 4.9 L Fuel Delivery problem
  120. 92 4.9 DeVille runs horrible, sets codes
  121. Roller Lifters On The 4.9?
  122. water pump change on 4.1ltr
  123. 93 deville
  124. 1993 Cadillac Seville: Please Help starting problem
  125. Bad coil?
  126. Rebuilding a tbi on 89 deville
  127. I Broke it
  128. 4.9 Surges After Hot Start
  129. Poor mileage and slighly high HC levels
  130. engine oil cooler lines
  131. Smoke out of exhaust
  132. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  133. code help
  134. Low mileage 4.9 Idling Rough Engine Sputters and quits
  135. First time Caddy owner needs some advice please
  136. Trouble with diagnostics
  137. changing oil pump in 90 deville 4.5
  138. Help I dont want to get rid of my car BUT!
  139. Has anyone changed their catalytic converter?
  140. 4.9 Liter idle
  141. Removing hydraulic fittings
  142. How many miles on the 4.9? ?
  143. 88 Sedan Deville not liking the winter
  144. Coolant hose to blower motor
  145. Timing Question
  146. '84 Eldorado blown head gasket?
  147. Oil pan heater?
  148. 4.9 Deville 95 whining noise like supercharger..
  149. Location of the CAM Position Sensor on the 95 4.9L deville?
  150. YES, i did it!!! All went well!
  151. 92 Eldo 4.9 for sale
  152. 4.5 water pump
  153. 93 4.9 STS wont start
  154. DESPERATELY Need Help!!! 85 CDV
  155. Trying to find good price on Allante gear reduction to use on my 4.9
  156. How to clean out EGR valves and throttle body?
  157. time for engine replacement soon-- help!
  158. Heater
  159. Hard starting
  160. 4.5 differences
  161. E98 rectification
  162. 87 fleetwood new ignition problem
  163. 1985 deville 4.1 Injector fuse keeps blowing
  164. PCM override, PS10
  165. EGR solenoid, is it normal?
  166. Get a LARGER capacity, 3 row radiator?
  167. Smoky when at full throttle!
  168. What does the code F.8.5 mean?
  169. 87 fleetwood 4.1 three problems,advice please!
  170. Removed Distributor--Question Before I Restart
  171. Changed the oil pump, lifter still taps on occasion warmed up..
  172. 87 deville, E48, EGR system problem
  173. Additive for newly remaned 86 DeVille Trans??
  174. Is it possible for a 4.9 main bearing thump to get progressively worse?
  175. 1989 Sedandeville issues
  176. 15W-40 Oil .....
  177. Fuel
  178. 82 eldorado alternator bracket
  179. 85 Deville ISC Problem--Might Have the Answer
  180. Help me Please!!!
  181. Weird idea
  182. Engine miss
  183. Pulled a thread
  184. E12 - No Distributor Signal???
  185. computer interchange, '90 Seville?
  186. Where Can I get some chips......
  187. Oil leak source...?
  188. well, i did it but...
  189. HT4100 ECM/BCM Problem?!
  190. #$$%^%@#$% damn .....floods on hot restart
  191. can't flush out "rubber glue type" coolant additive... what to do?
  192. Transmission Shift cable
  193. HT4100 ISC Help
  194. 4t60-E going out
  195. Fuel Issues - Please Help!
  196. 4t60-E FDR and the computer
  197. Fixed my car! Need help on one more thing...
  198. What's wrong with my car? The mystery continues...
  199. When i go to replace the mains....
  200. 4t60-E Shudder?
  201. last year
  202. All 4.x engine service parts are discontinued?
  203. Does anybody have a spare 4.9?
  204. Knock, Knock, Knock, 4.9L
  205. Alright, i'm going in!! I need a few parts and info please.
  206. 90 4.5L Idle Learn Procedure?
  207. I have a slight problem,,, HT4100
  208. Fuel Pressure Test Fitting
  209. 1985 Seville code e15
  210. Cooling Fan Module--Where can I get one?
  211. Bars Leaks Head Gasket Repair
  212. Code E30 on 85 Deville and Vacuum Pumps
  213. Copper Gaskets?
  214. Battery/ALternator area cracking noise?
  215. Oil Analysis: Proof is in the results
  216. 1992 Eldo
  217. That Funky Emissions Tubing
  218. Hey Guys long time no chat, and long time not wanting to start either.
  219. The once a year survival kit for the 4.X series
  220. 4.9 runs rough black exhaust from tail pipe
  221. 1985 Seville harsh shifting tranny
  222. Odd brief buzzing noise from undercarriage
  223. i need a 4t60e guru; i am hating mine
  224. what is up with my car
  225. Early vs. Late 1985 FWD 4100
  226. Strange ISC
  227. 1994 cadillac deville engine knocks when warm
  228. 4.5 --> 4.9
  229. Getting ready for water pump removal
  230. 1988 Eldorado 4.5
  231. 1985 FWD HT4100 Running rough
  232. Question about spark plugs!
  233. TPS problem?
  234. 4100 Mpg
  235. 87 deville 4100 shift problems
  236. 1991 DeVille Speedometer/Transmission Trouble.
  237. Starter solenoid replacement
  238. 4.9 Injector Replacement Questions
  239. 92 STS error code A048 what does that mean?
  240. 1994 Deville 4.9 Idler pulleys
  241. Please Help!!! Rough running 4.9 , Help!!
  242. 1994 Deville 4.9 spark knock
  243. 85 Sedan Deville Stalls after 20 Miles
  244. 4.9 Potential? (Split from "4.9 to a 5.0?")
  245. 94 Deville 4.9 switching complete sending/fuel pumps
  246. 4.9 to a 5.0?
  247. Fan Runs all the time on 4.9, engine runs real cold
  248. AHHH HELP!!! Keep overheating
  249. 4.5 Vs. 4.9
  250. Fuel Mileage vs. Data Center