: HT4100 4.1, 4.5, 4.9



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  1. Knocking
  2. Knock sensor on HT4100?
  3. Cold air zapping coil!
  4. Error code 29
  5. Replaced everything...stumble is worse.
  6. 1984 Eldo 4.1 Engine Color Needed
  7. frontend noise
  8. Fastchip - Does it work?
  9. Does everyone have mandrel-bent piping?
  10. What is the Factory Timing for a 93 Eldorado
  11. I want a DIC (get your mind out of the gutter) :D
  12. 4.9 in Brougham??
  13. engine change
  14. Ram Air/Cold air intake for 4.9?
  15. Underdrive pulleys?
  16. Braking Engine Jump... 1990 DeVille
  17. engine miss 4.5 ???
  18. '90 DeVille ISC motor problem SOLVED
  19. 94 Deville misses backfires & DIES! whats wrong
  20. Fuel injector problem?
  21. Can't get my 4.9 to Adjust timing
  22. Valve Lash Adjustment
  23. 95 4.9 flywheel breakage?
  24. Fuel Pump Relay
  25. Not getting enough spark
  26. Not again!!
  27. Oxygen Sensor
  28. 4.9L Fuel Economy
  29. HT 4100 - Success stories
  30. Gurgling Sound In Engine?
  31. Second generation HT4100
  32. 1984 Fleetwood Code 52 ECM memory reset problem
  33. 84 Eldorado No Start
  34. engine rev's and dies
  35. Engine revs when I turn the wheel????????
  36. throddle control
  37. something happened today with the 90 deville and i don't know what
  38. unique problem 4.9
  39. Stoneys Main Bearing Diary
  40. nees help fast please
  41. 4.9 timing is hard! Idles rough, stumble on acceleration
  42. Water Pump Leakage!!!
  43. Min air ????
  44. Help with a water pump installation!!
  45. How to replace water pump on 92 seville?
  46. Another TPS ?????
  47. 87 Deville 4.1- No fuel!!!!!
  48. horsepower for 4.9
  49. A question for the gurus
  50. Trans cooler leak!
  51. 1990 Cadillac Sedan Deville high idle
  52. new oils verses old oils
  53. Minimum IDLE SCREW adjustment
  54. Oil cooler line o-ring
  55. Is my ISC motor shot? ('90 4.5L)
  56. Help with identifying a GM Goodwrench replacement block.
  57. Where is the MAP sensor located ???? 84 Seville
  58. 89 Deville engine pinging under load when warm
  59. new isc and tps
  60. Code Triggered: E66
  61. Low oil pressure at idle
  62. 4.x starter interchange list
  63. 4.9 91' coupe suspension level
  64. 4100 timing question
  65. Where do these fuel lines run??
  66. 1990 Sedan Deville 4.5L A Few Questions
  67. Uneven idle
  68. Teardown set for friday ...
  69. Ac Compressor
  70. Is this repair worth it?
  71. How Hot is too hot, Ouchi Hottie story inside.
  72. 89 cadillac 4.5 oxygen sensors
  73. Bore spacing
  74. 87 Deville NO FUEL!!!!
  75. FWD HT4100 air pump pupose?
  76. pinhole in block, leaks coolant, what should I do?
  77. 4.9 Just started running rough at idle
  78. Repair cost too high?
  79. 1990 Cadillac Sedan DeVille - Idling Too High
  80. HT4100 valve train pics
  81. Thermosat Question
  82. Am I stuck having to use an 80 series muffler?
  83. Strange COOLANT SENSOR readings--And engine cuts out while driving!!!
  84. water pump
  85. Oil Pan Gasket replacement on a 4.5L
  86. Error Code E41 Camshaft Position Sensor
  87. 4.9 starter problems
  88. 94 deville runs rough at cold start
  89. So Even After $700 dollars it still leaks!
  90. Swap ?'s
  91. Emission test failure
  92. How do I get my 4.5L to coast down to the "70 mpg" benchmark?
  93. A question about the Rotella Motor Oil
  94. Pls Help 4.9 ac compressor froze
  95. Deville shakes violently .. Please help!
  96. 1993 Deville ODB Codes Tripped, Idle Motor
  97. EGR valve replacement fixed the knocking problem!
  98. water pump leaking after i change it
  99. How to enter override E.5.3 on a '90 DeVille
  100. Hose question & error code 30 and 34
  101. 87 Deville Intake
  102. 4.9 intake manifold
  103. Feels like mis-fire. 85 fleetwood 4.1
  104. Engine replacement on an 88 Coupe
  105. fuel pump?????
  106. wot's and front oil seal
  107. oil pan gaskets
  108. emissions failed
  109. Crossover pipe
  110. I got into my diagnostics w/o a clue
  111. Code P039 Current?
  112. error code
  113. Pump thingy :/ 4.1 HT
  114. Programers???
  115. first service on my 89 deville
  116. stumbling, hesitation under load only
  117. 4.9 acceleration? ? ?
  118. Head or Intake?
  119. Are 1990 Throttle bodies obsolete?
  120. 91 DeVille Stalls Repeatedly
  121. Engine Soon EGR code
  122. Motor mounts/CV Joint
  123. Motor mounts/CV Joint
  124. Motor mounts/CV Joint
  125. Deville Acclerating
  126. need help
  127. i need help
  128. 4.5 to 4.9?
  129. HT4100 MSD IGNITON, should I ?
  130. Cooling Pipe Crack
  131. HT4100 Question
  132. 4.9l bolt on mods??
  133. I hate this car.
  134. Stumbling, hesitation, backfiring 89 Deville 4.5
  135. Distributor cap wiring help!!! 4.5 litre 89 deville
  136. HT4100 vacuum pump
  137. Yet another head gasket question
  138. Fuel injection question
  139. Fuel tank baffles or pump?
  140. 88 Coupe Deville Intake Manifold or Head gasket
  141. Help required !!
  142. Crazy Cadillacs
  143. This is a weird one
  144. Ok Guys, So what parts break? Engine Wise.
  145. 91 deville runs a little hot
  146. Fuel Pump Revisited
  147. 4.9 knocking
  148. WTF? Why won't this thing just blow up...
  149. 95 deville idle problem...2
  150. Deville 4.1 fwd rear main oil seal leak :(
  151. water pumps
  152. Nasty squeal - water pump?
  153. what EXACTLY do I need...?!
  154. 1988 Cadillac Coupe Deville Head Gasket
  155. Thermostat housing torque specs
  156. Engine compartment revisions!
  157. 1990 fleetwood engine miss please help
  158. I think I need a distributor 89 Deville 4.5
  159. A blog for Caddy fans
  160. MGB 4.5 project
  161. E52 code
  162. spark wires cover - removal help
  163. 1990 deville 4.5 won't even turn over
  164. water pump replacement
  165. Wheel Bearing installation - help....
  166. Remeber where those vac lines go.....
  167. E Codes on my 4.5 HELP
  168. E39 and E48 codes could I get some advice?
  169. Can anything go wrong/Flushing coolant?
  170. Another way to pull codes?
  171. Camshaft lifter questions
  172. exhaust manifold
  173. 4.5L ECM inputs
  174. Why I hate NTK Oxy Sensors from Now ON.
  175. Coolant pellets/conditoner
  176. Prob with 86 deville sedan with 4.9L *HELP*
  177. Ported vacuum switch--supposed to have a wire connected to it?
  178. 4.9L Aluminum Head project?
  179. Stoneage_caddy I had my car's fuel preasure checked today,have a couple of questions
  180. Anyone running an Auto meter Air/Fuel Ratio meter.
  181. What O2 sensor(s) are you using.
  182. antifreeze for my 85 fleetwoods ht4100
  183. Antifreeze for my HT4100
  184. 1989 Eldorado Biarritz MPG
  185. 1991 deville engine dies when coasting
  186. The Homemade 5 Liter PFI Project .....
  187. 85 seville valve lifters
  188. Blown 4.1 ht in 83 eldorado ?? how to tell ?
  189. Bogging problem
  190. Throttle body problem, help please
  191. I knew I saw it someplace, now where did it go, no not my sanity but close?
  192. 4.5......which sensor is bad?
  193. 4.9 bearing part number or TSB?
  194. Help with HT4100 water pump
  195. which is the better motor
  196. Nitrous Question
  197. 1995 DeVille Idle Fluctuation
  198. issues w/ back pressure?!?
  199. Well the pump is on, but my serpentine belt...what?
  200. 83 Sedan Deville 4100
  201. Its an Invasion 4.9, 5spd Stick Fiero
  202. why I love my 4.5...
  203. 1985 deville coolant and heater core questions.
  204. New member here, and I need some '93 Deville help (water pump installation)
  205. 1990 Allante Bosch fuel injectors/FiveOMotorsports
  206. Cleaning '90 EGR 4.5
  207. Groll Polluter FIXED??????????????????
  208. Where does this fuel line run?
  209. 88 Deville.Tensioner Pulley.
  210. 85 4100 is running rough and hesitating
  211. car will not go past 35mph 82 with a 4.1
  212. Does anyone have a picture or info on the Negative block ground?
  213. EGR Cleaning
  214. Cheap quality Rebuilt transmissions
  215. 4.5 Fast Idle problem
  216. I need a no Yo-Yo shift-kit immediately!! '84 RWD DeVille
  217. 93 Runs rough & loud when wet
  218. Spark Plug Replacement
  219. Fuel Injector Compatiblity
  220. Oil pan gasket
  221. No Spark/ No Start Problem/ Pulling what hair I have left out!
  222. oil change
  223. Accel fuel injectors
  224. Alldata (autozone)????????????????????
  225. A/C Compressor
  226. Help ECM E85
  227. Fuel Pumps on '82-85 HT4100 -- Life span??
  228. Analyzing Fuel Economy
  229. Difference between '82 vs '85 Fuel Injectors on the HT4100????
  230. Oil Theories
  231. Got Injectors? 4.9/4.5
  232. E048
  233. Why Wont This Car Start After I Put In A New Alternator.
  234. '85 Throttle Body in an 82 Eldo???
  235. 4.9 knocking
  236. Hole In Muffler(Recommended Replacement)
  237. 91 DeVille
  238. In reguard to my deville's rough idleing,could it just need an induction service?
  239. Code question.
  240. Plugs for 4.9
  241. 1994 Deville 4.9 (Serpentine Belt) - Save Me From the Junk Yard
  242. Inaccurate gas readout?
  243. 1990 Allante fuel injectors
  244. 4.9 with sleeves?
  245. 4.9 Air Cleaner
  246. Stoneage_caddy my deville is stuttering when idleing,any ideas?
  247. 92 4.9 fleetwood high idle
  248. 1994 4.9L won't pass emissions HCs too high How to fix?
  249. HELLO - I'm seeing an error code 52 - any idea what that means?
  250. 4100 Reliability