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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. 1985 Seville code e15
  2. Fuel Pressure Test Fitting
  3. I have a slight problem,,, HT4100
  4. 90 4.5L Idle Learn Procedure?
  5. Alright, i'm going in!! I need a few parts and info please.
  6. Knock, Knock, Knock, 4.9L
  7. Does anybody have a spare 4.9?
  8. All 4.x engine service parts are discontinued?
  9. last year
  10. 4t60-E Shudder?
  11. When i go to replace the mains....
  12. What's wrong with my car? The mystery continues...
  13. Fixed my car! Need help on one more thing...
  14. 4t60-E FDR and the computer
  15. Fuel Issues - Please Help!
  16. 4t60-E going out
  17. HT4100 ISC Help
  18. Transmission Shift cable
  19. can't flush out "rubber glue type" coolant additive... what to do?
  20. #$$%^%@#$% damn .....floods on hot restart
  21. HT4100 ECM/BCM Problem?!
  22. well, i did it but...
  23. Oil leak source...?
  24. Where Can I get some chips......
  25. computer interchange, '90 Seville?
  26. E12 - No Distributor Signal???
  27. Pulled a thread
  28. Engine miss
  29. Weird idea
  30. Help me Please!!!
  31. 85 Deville ISC Problem--Might Have the Answer
  32. 82 eldorado alternator bracket
  33. Fuel
  34. 15W-40 Oil .....
  35. 1989 Sedandeville issues
  36. Is it possible for a 4.9 main bearing thump to get progressively worse?
  37. Additive for newly remaned 86 DeVille Trans??
  38. 87 deville, E48, EGR system problem
  39. Changed the oil pump, lifter still taps on occasion warmed up..
  40. Removed Distributor--Question Before I Restart
  41. 87 fleetwood 4.1 three problems,advice please!
  42. What does the code F.8.5 mean?
  43. Smoky when at full throttle!
  44. Get a LARGER capacity, 3 row radiator?
  45. EGR solenoid, is it normal?
  46. PCM override, PS10
  47. 1985 deville 4.1 Injector fuse keeps blowing
  48. 87 fleetwood new ignition problem
  49. E98 rectification
  50. 4.5 differences
  51. Hard starting
  52. Heater
  53. time for engine replacement soon-- help!
  54. How to clean out EGR valves and throttle body?
  55. Trying to find good price on Allante gear reduction to use on my 4.9
  56. DESPERATELY Need Help!!! 85 CDV
  57. 93 4.9 STS wont start
  58. 4.5 water pump
  59. 92 Eldo 4.9 for sale
  60. YES, i did it!!! All went well!
  61. Location of the CAM Position Sensor on the 95 4.9L deville?
  62. 4.9 Deville 95 whining noise like supercharger..
  63. Oil pan heater?
  64. '84 Eldorado blown head gasket?
  65. Timing Question
  66. Coolant hose to blower motor
  67. 88 Sedan Deville not liking the winter
  68. How many miles on the 4.9? ?
  69. Removing hydraulic fittings
  70. 4.9 Liter idle
  71. Has anyone changed their catalytic converter?
  72. Help I dont want to get rid of my car BUT!
  73. changing oil pump in 90 deville 4.5
  74. Trouble with diagnostics
  75. First time Caddy owner needs some advice please
  76. Low mileage 4.9 Idling Rough Engine Sputters and quits
  77. code help
  78. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  79. Smoke out of exhaust
  80. engine oil cooler lines
  81. Poor mileage and slighly high HC levels
  82. 4.9 Surges After Hot Start
  83. I Broke it
  84. Rebuilding a tbi on 89 deville
  85. Bad coil?
  86. 1993 Cadillac Seville: Please Help starting problem
  87. 93 deville
  88. water pump change on 4.1ltr
  89. Roller Lifters On The 4.9?
  90. 92 4.9 DeVille runs horrible, sets codes
  91. Need help 4.9 L Fuel Delivery problem
  92. Starter motor gone on 87 deville 4.1
  93. Bypass Catalytic Converter on 1993 Deville?
  94. OMG water pump problem!
  95. Tranny problems, E39!! Please help, dont want to rebuild...
  96. 4.1 main bearing thump
  97. EGR Valve
  98. Disaster
  99. Quick question: Ignition Control Module
  100. 4.9L Rear Oil Leak
  101. Just finished my 4.9 Water pump repair pics inside
  102. fuel pressure????
  103. Campaign 95-C-72 (recall)
  104. Stock Exhaust dimensions on 93 Devilles
  105. Cooling System - Water Pump Conditioner/Anti-Rust
  106. 93 DeVille AC converter clutch bypass ???
  107. Crack in my Block
  108. 84 eldorado fuse panel pictures?
  109. What kind of ISC motor should i get?
  110. Rattle Under Car
  111. New Caddy Owner, Need Some Help
  112. 93 Deville stalls after car warms up
  113. Need exhaust manifolds 4.1 HT4100
  114. 85 Deville Still Has Poor Performance
  115. 94 4.9 bypass siezed A/C compressor
  116. Oh just great, a collapsed lifter in #1 cylinder!!
  117. The SEA FOAM experience thread.
  118. power steering leakk
  119. Thoughts on the 4.5
  120. 4.9 E55 code. TPS?
  121. Makes me nervous!
  122. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  123. HT4100 Question
  124. Makes Me Happy!
  125. GM Top End Cleaner Has Been Discontinued
  126. 1985 deville ht4100 jump start
  127. Installing oil pump in 4.9 engine.
  128. 1985 Seville Power Steering Pulley bolt
  129. 1988 Fleetwood 4.5 Distributor order
  130. Stop Engine, Low Oil Pressure
  131. Engine surges at slow speed
  132. Need Help Please
  133. How to start when very cold (less than 0 F)
  134. Oil Level
  135. MAP Problems
  136. Intermittent Lurch—91 DeVille 4.9
  137. how to get more hp from a 4100
  138. 4.1L injector
  139. HT4500 and 4900 series Performance
  140. 4.5L TBI Grumbling
  141. 1990 deville 4.5 air pump noisy
  142. 4.1 Knock?? Or Tap??
  143. Fleetwood/DeVille Speedometer
  144. Fuel pump on 4.9 92 Deville
  145. 4.5 TBI smoking
  146. 86 EGR Valve
  147. Favorite things about the 4.9?
  148. engin and trany swap for an 85 coupe deville
  149. Fixed EGR now MPG is lower
  150. Underhood smoking... need help with a diagnosis
  151. Sticky Gas Pedal...4.5L
  152. The Ultimate FWD Cadillac Engine Swap
  153. Speedometer Sensor issue ?
  154. HT-4500 Starting trouble
  155. '84 Eldo Code 44
  156. 4.9 groaning
  157. 1990 Seville Timing chain?
  158. E012,E053 Won't run
  159. 84 eldo conv't - 70 weight oil - yes or no?
  160. 94 Deville has almost no power from start
  161. 4.5 TBI rough idle
  162. gas pedal
  163. Stallling at idle
  164. 1989 Caddy Deville......help!!!
  165. Oil Cooler Lines Leaking
  166. Low oil pressure!
  167. Code and Coolant Prob.
  168. Throttle Body Plate issue
  169. 1989 Caddy Deville......
  170. New Trouble Code
  171. 4.5 Allante intake on 93 4.9 deville
  172. codes ???please help
  173. Code E48 diagnosis
  174. 1985 Deville with a 4100 and it will not crank
  175. 1985 Deville with a 4100 and it will not crank
  176. Mobil 1 10W30
  177. Strange Timing Issues
  178. 1983 Caddy transmission
  179. serious help needed
  180. Need Help On Two More Things
  181. where do i go from here
  182. 1985 deville died
  183. Don't ask oil questions on this site.
  184. temp sensor
  185. A.I.R. Pump 4.5l '89 Deville
  186. Throttle Position Sensor Misadjusted
  187. Bad Head Gasket 92 DeVille 4.9- Need opinion
  188. Restore Lubricants
  189. Bad alternator in 93 Deville, need help
  190. Removing EGR valve - 4100
  191. Ignition Module issue
  192. Frozen Pulley
  193. 130 mph in a 4.9!
  194. ECM software
  195. 1993 Deville power steering pump failure
  196. new cadillac seville owner coolant flush
  197. Good old 83' Coupe Deville
  198. 1992 seville 4.9 fuel filter location
  199. part identification 4.9
  200. Tranny Slipping?
  201. oil
  202. Your opinion of the 4.5L V8 in the 88 DeVille
  203. Sputtering, loss of power when hot
  204. weird SES and hard start problem
  205. Got a code do not know what or where to check
  206. 83 FWB Idle Problems
  207. Open Throttle Switch Signal E27
  208. What senses the RPM on HT4100 engines?
  209. 86 Fleetwood engine swap
  210. The continuing saga of my tranny problems...please help!
  211. 4.9 Squeaking at Idle
  212. Engine mount - Any unique replacements?
  213. 4.9 litre plug wire access problem.
  214. 4.1/4100 Distributor Hold down- how to tighten???
  215. Serevice engine soon
  216. Air Filter Question
  217. E055 OBD1 Code
  218. keeps going like the energizer bunny
  219. 4.9L seville/deville fastchips or superchips performance chip
  220. fuel injection??>??
  221. 85 Deville TV Cable Adjustment
  222. Looking f/a 4100 4.1?
  223. Failed smog test - high CO
  224. Horrendous gas mileage
  225. Anyone change the valve cover gaskets?
  226. 85 Seville with 4.1 Engine: Buy or Run?
  227. 1985 deville runs great but
  228. Why An Aluminum Block with Iron Heads?
  229. ht4100 engine cleanup. how to?
  230. car runs too rich didnt pass smog
  231. Best way to bleed the cooling system?
  232. 4.1L.. What's the problem?
  233. Another Isc Question?
  234. Alternator Issues--Please Help!
  235. 4.5L L (front) Cracked Header
  236. indexing spark plugs
  237. HT4100 Misfire Question
  238. Problems w/ 4.9
  239. Rocker Arm Support Part Problem-HELP?
  240. Think the engine/tranny would last?
  241. Calling all 4.5 PFI and 4.9 PFI Owners
  242. Coolant Supplement?
  243. Car wont shift on its own but shifts manually
  244. High startup idle?
  245. gas leak from cannister (85 Eldorado)
  246. tuning Questions for a 93 deville
  247. Setting Timing on '84 HT4100 4.1L
  248. Check Vehicle Light
  249. Slight fuel leak at TBI
  250. Idle is too high now