: HT4100 4.1, 4.5, 4.9



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  1. Ram Air/Cold air intake for 4.9?
  2. Underdrive pulleys?
  3. Braking Engine Jump... 1990 DeVille
  4. engine miss 4.5 ???
  5. '90 DeVille ISC motor problem SOLVED
  6. 94 Deville misses backfires & DIES! whats wrong
  7. Fuel injector problem?
  8. Can't get my 4.9 to Adjust timing
  9. Valve Lash Adjustment
  10. 95 4.9 flywheel breakage?
  11. Fuel Pump Relay
  12. Not getting enough spark
  13. Not again!!
  14. Oxygen Sensor
  15. 4.9L Fuel Economy
  16. HT 4100 - Success stories
  17. Gurgling Sound In Engine?
  18. Second generation HT4100
  19. 1984 Fleetwood Code 52 ECM memory reset problem
  20. 84 Eldorado No Start
  21. engine rev's and dies
  22. Engine revs when I turn the wheel????????
  23. throddle control
  24. something happened today with the 90 deville and i don't know what
  25. unique problem 4.9
  26. Stoneys Main Bearing Diary
  27. nees help fast please
  28. 4.9 timing is hard! Idles rough, stumble on acceleration
  29. Water Pump Leakage!!!
  30. Min air ????
  31. Help with a water pump installation!!
  32. How to replace water pump on 92 seville?
  33. Another TPS ?????
  34. 87 Deville 4.1- No fuel!!!!!
  35. horsepower for 4.9
  36. A question for the gurus
  37. Trans cooler leak!
  38. 1990 Cadillac Sedan Deville high idle
  39. new oils verses old oils
  40. Minimum IDLE SCREW adjustment
  41. Oil cooler line o-ring
  42. Is my ISC motor shot? ('90 4.5L)
  43. Help with identifying a GM Goodwrench replacement block.
  44. Where is the MAP sensor located ???? 84 Seville
  45. 89 Deville engine pinging under load when warm
  46. new isc and tps
  47. Code Triggered: E66
  48. Low oil pressure at idle
  49. 4.x starter interchange list
  50. 4.9 91' coupe suspension level
  51. 4100 timing question
  52. Where do these fuel lines run??
  53. 1990 Sedan Deville 4.5L A Few Questions
  54. Uneven idle
  55. Teardown set for friday ...
  56. Ac Compressor
  57. Is this repair worth it?
  58. How Hot is too hot, Ouchi Hottie story inside.
  59. 89 cadillac 4.5 oxygen sensors
  60. Bore spacing
  61. 87 Deville NO FUEL!!!!
  62. FWD HT4100 air pump pupose?
  63. pinhole in block, leaks coolant, what should I do?
  64. 4.9 Just started running rough at idle
  65. Repair cost too high?
  66. 1990 Cadillac Sedan DeVille - Idling Too High
  67. HT4100 valve train pics
  68. Thermosat Question
  69. Am I stuck having to use an 80 series muffler?
  70. Strange COOLANT SENSOR readings--And engine cuts out while driving!!!
  71. water pump
  72. Oil Pan Gasket replacement on a 4.5L
  73. Error Code E41 Camshaft Position Sensor
  74. 4.9 starter problems
  75. 94 deville runs rough at cold start
  76. So Even After $700 dollars it still leaks!
  77. Swap ?'s
  78. Emission test failure
  79. How do I get my 4.5L to coast down to the "70 mpg" benchmark?
  80. A question about the Rotella Motor Oil
  81. Pls Help 4.9 ac compressor froze
  82. Deville shakes violently .. Please help!
  83. 1993 Deville ODB Codes Tripped, Idle Motor
  84. EGR valve replacement fixed the knocking problem!
  85. water pump leaking after i change it
  86. How to enter override E.5.3 on a '90 DeVille
  87. Hose question & error code 30 and 34
  88. 87 Deville Intake
  89. 4.9 intake manifold
  90. Feels like mis-fire. 85 fleetwood 4.1
  91. Engine replacement on an 88 Coupe
  92. fuel pump?????
  93. wot's and front oil seal
  94. oil pan gaskets
  95. emissions failed
  96. Crossover pipe
  97. I got into my diagnostics w/o a clue
  98. Code P039 Current?
  99. error code
  100. Pump thingy :/ 4.1 HT
  101. Programers???
  102. first service on my 89 deville
  103. stumbling, hesitation under load only
  104. 4.9 acceleration? ? ?
  105. Head or Intake?
  106. Are 1990 Throttle bodies obsolete?
  107. 91 DeVille Stalls Repeatedly
  108. Engine Soon EGR code
  109. Motor mounts/CV Joint
  110. Motor mounts/CV Joint
  111. Motor mounts/CV Joint
  112. Deville Acclerating
  113. need help
  114. i need help
  115. 4.5 to 4.9?
  116. HT4100 MSD IGNITON, should I ?
  117. Cooling Pipe Crack
  118. HT4100 Question
  119. 4.9l bolt on mods??
  120. I hate this car.
  121. Stumbling, hesitation, backfiring 89 Deville 4.5
  122. Distributor cap wiring help!!! 4.5 litre 89 deville
  123. HT4100 vacuum pump
  124. Yet another head gasket question
  125. Fuel injection question
  126. Fuel tank baffles or pump?
  127. 88 Coupe Deville Intake Manifold or Head gasket
  128. Help required !!
  129. Crazy Cadillacs
  130. This is a weird one
  131. Ok Guys, So what parts break? Engine Wise.
  132. 91 deville runs a little hot
  133. Fuel Pump Revisited
  134. 4.9 knocking
  135. WTF? Why won't this thing just blow up...
  136. 95 deville idle problem...2
  137. Deville 4.1 fwd rear main oil seal leak :(
  138. water pumps
  139. Nasty squeal - water pump?
  140. what EXACTLY do I need...?!
  141. 1988 Cadillac Coupe Deville Head Gasket
  142. Thermostat housing torque specs
  143. Engine compartment revisions!
  144. 1990 fleetwood engine miss please help
  145. I think I need a distributor 89 Deville 4.5
  146. A blog for Caddy fans
  147. MGB 4.5 project
  148. E52 code
  149. spark wires cover - removal help
  150. 1990 deville 4.5 won't even turn over
  151. water pump replacement
  152. Wheel Bearing installation - help....
  153. Remeber where those vac lines go.....
  154. E Codes on my 4.5 HELP
  155. E39 and E48 codes could I get some advice?
  156. Can anything go wrong/Flushing coolant?
  157. Another way to pull codes?
  158. Camshaft lifter questions
  159. exhaust manifold
  160. 4.5L ECM inputs
  161. Why I hate NTK Oxy Sensors from Now ON.
  162. Coolant pellets/conditoner
  163. Prob with 86 deville sedan with 4.9L *HELP*
  164. Ported vacuum switch--supposed to have a wire connected to it?
  165. 4.9L Aluminum Head project?
  166. Stoneage_caddy I had my car's fuel preasure checked today,have a couple of questions
  167. Anyone running an Auto meter Air/Fuel Ratio meter.
  168. What O2 sensor(s) are you using.
  169. antifreeze for my 85 fleetwoods ht4100
  170. Antifreeze for my HT4100
  171. 1989 Eldorado Biarritz MPG
  172. 1991 deville engine dies when coasting
  173. The Homemade 5 Liter PFI Project .....
  174. 85 seville valve lifters
  175. Blown 4.1 ht in 83 eldorado ?? how to tell ?
  176. Bogging problem
  177. Throttle body problem, help please
  178. I knew I saw it someplace, now where did it go, no not my sanity but close?
  179. 4.5......which sensor is bad?
  180. 4.9 bearing part number or TSB?
  181. Help with HT4100 water pump
  182. which is the better motor
  183. Nitrous Question
  184. 1995 DeVille Idle Fluctuation
  185. issues w/ back pressure?!?
  186. Well the pump is on, but my serpentine belt...what?
  187. 83 Sedan Deville 4100
  188. Its an Invasion 4.9, 5spd Stick Fiero
  189. why I love my 4.5...
  190. 1985 deville coolant and heater core questions.
  191. New member here, and I need some '93 Deville help (water pump installation)
  192. 1990 Allante Bosch fuel injectors/FiveOMotorsports
  193. Cleaning '90 EGR 4.5
  194. Groll Polluter FIXED??????????????????
  195. Where does this fuel line run?
  196. 88 Deville.Tensioner Pulley.
  197. 85 4100 is running rough and hesitating
  198. car will not go past 35mph 82 with a 4.1
  199. Does anyone have a picture or info on the Negative block ground?
  200. EGR Cleaning
  201. Cheap quality Rebuilt transmissions
  202. 4.5 Fast Idle problem
  203. I need a no Yo-Yo shift-kit immediately!! '84 RWD DeVille
  204. 93 Runs rough & loud when wet
  205. Spark Plug Replacement
  206. Fuel Injector Compatiblity
  207. Oil pan gasket
  208. No Spark/ No Start Problem/ Pulling what hair I have left out!
  209. oil change
  210. Accel fuel injectors
  211. Alldata (autozone)????????????????????
  212. A/C Compressor
  213. Help ECM E85
  214. Fuel Pumps on '82-85 HT4100 -- Life span??
  215. Analyzing Fuel Economy
  216. Difference between '82 vs '85 Fuel Injectors on the HT4100????
  217. Oil Theories
  218. Got Injectors? 4.9/4.5
  219. E048
  220. Why Wont This Car Start After I Put In A New Alternator.
  221. '85 Throttle Body in an 82 Eldo???
  222. 4.9 knocking
  223. Hole In Muffler(Recommended Replacement)
  224. 91 DeVille
  225. In reguard to my deville's rough idleing,could it just need an induction service?
  226. Code question.
  227. Plugs for 4.9
  228. 1994 Deville 4.9 (Serpentine Belt) - Save Me From the Junk Yard
  229. Inaccurate gas readout?
  230. 1990 Allante fuel injectors
  231. 4.9 with sleeves?
  232. 4.9 Air Cleaner
  233. Stoneage_caddy my deville is stuttering when idleing,any ideas?
  234. 92 4.9 fleetwood high idle
  235. 1994 4.9L won't pass emissions HCs too high How to fix?
  236. HELLO - I'm seeing an error code 52 - any idea what that means?
  237. 4100 Reliability
  238. 1982 eldorado low oiil pressure light on immediately after oil change??
  239. 82 deville VIBE SOLVED
  240. let the thing blow up??
  241. Low Oil Pressure Light 1982 eldorado
  242. engins problem
  243. radiator blew apart
  244. new to the forum - big problem
  245. Whats the best place to find a replacment 4.9
  246. RE: 82 deville
  247. 4.1 ELDO Hesitation and Stall
  248. 84 4.1 Eldo
  249. Fuel Injectors
  250. Regular gas vs. premium gas