: HT4100 4.1, 4.5, 4.9



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  1. something happened today with the 90 deville and i don't know what
  2. unique problem 4.9
  3. Stoneys Main Bearing Diary
  4. nees help fast please
  5. 4.9 timing is hard! Idles rough, stumble on acceleration
  6. Water Pump Leakage!!!
  7. Min air ????
  8. Help with a water pump installation!!
  9. How to replace water pump on 92 seville?
  10. Another TPS ?????
  11. 87 Deville 4.1- No fuel!!!!!
  12. horsepower for 4.9
  13. A question for the gurus
  14. Trans cooler leak!
  15. 1990 Cadillac Sedan Deville high idle
  16. new oils verses old oils
  17. Minimum IDLE SCREW adjustment
  18. Oil cooler line o-ring
  19. Is my ISC motor shot? ('90 4.5L)
  20. Help with identifying a GM Goodwrench replacement block.
  21. Where is the MAP sensor located ???? 84 Seville
  22. 89 Deville engine pinging under load when warm
  23. new isc and tps
  24. Code Triggered: E66
  25. Low oil pressure at idle
  26. 4.x starter interchange list
  27. 4.9 91' coupe suspension level
  28. 4100 timing question
  29. Where do these fuel lines run??
  30. 1990 Sedan Deville 4.5L A Few Questions
  31. Uneven idle
  32. Teardown set for friday ...
  33. Ac Compressor
  34. Is this repair worth it?
  35. How Hot is too hot, Ouchi Hottie story inside.
  36. 89 cadillac 4.5 oxygen sensors
  37. Bore spacing
  38. 87 Deville NO FUEL!!!!
  39. FWD HT4100 air pump pupose?
  40. pinhole in block, leaks coolant, what should I do?
  41. 4.9 Just started running rough at idle
  42. Repair cost too high?
  43. 1990 Cadillac Sedan DeVille - Idling Too High
  44. HT4100 valve train pics
  45. Thermosat Question
  46. Am I stuck having to use an 80 series muffler?
  47. Strange COOLANT SENSOR readings--And engine cuts out while driving!!!
  48. water pump
  49. Oil Pan Gasket replacement on a 4.5L
  50. Error Code E41 Camshaft Position Sensor
  51. 4.9 starter problems
  52. 94 deville runs rough at cold start
  53. So Even After $700 dollars it still leaks!
  54. Swap ?'s
  55. Emission test failure
  56. How do I get my 4.5L to coast down to the "70 mpg" benchmark?
  57. A question about the Rotella Motor Oil
  58. Pls Help 4.9 ac compressor froze
  59. Deville shakes violently .. Please help!
  60. 1993 Deville ODB Codes Tripped, Idle Motor
  61. EGR valve replacement fixed the knocking problem!
  62. water pump leaking after i change it
  63. How to enter override E.5.3 on a '90 DeVille
  64. Hose question & error code 30 and 34
  65. 87 Deville Intake
  66. 4.9 intake manifold
  67. Feels like mis-fire. 85 fleetwood 4.1
  68. Engine replacement on an 88 Coupe
  69. fuel pump?????
  70. wot's and front oil seal
  71. oil pan gaskets
  72. emissions failed
  73. Crossover pipe
  74. I got into my diagnostics w/o a clue
  75. Code P039 Current?
  76. error code
  77. Pump thingy :/ 4.1 HT
  78. Programers???
  79. first service on my 89 deville
  80. stumbling, hesitation under load only
  81. 4.9 acceleration? ? ?
  82. Head or Intake?
  83. Are 1990 Throttle bodies obsolete?
  84. 91 DeVille Stalls Repeatedly
  85. Engine Soon EGR code
  86. Motor mounts/CV Joint
  87. Motor mounts/CV Joint
  88. Motor mounts/CV Joint
  89. Deville Acclerating
  90. need help
  91. i need help
  92. 4.5 to 4.9?
  93. HT4100 MSD IGNITON, should I ?
  94. Cooling Pipe Crack
  95. HT4100 Question
  96. 4.9l bolt on mods??
  97. I hate this car.
  98. Stumbling, hesitation, backfiring 89 Deville 4.5
  99. Distributor cap wiring help!!! 4.5 litre 89 deville
  100. HT4100 vacuum pump
  101. Yet another head gasket question
  102. Fuel injection question
  103. Fuel tank baffles or pump?
  104. 88 Coupe Deville Intake Manifold or Head gasket
  105. Help required !!
  106. Crazy Cadillacs
  107. This is a weird one
  108. Ok Guys, So what parts break? Engine Wise.
  109. 91 deville runs a little hot
  110. Fuel Pump Revisited
  111. 4.9 knocking
  112. WTF? Why won't this thing just blow up...
  113. 95 deville idle problem...2
  114. Deville 4.1 fwd rear main oil seal leak :(
  115. water pumps
  116. Nasty squeal - water pump?
  117. what EXACTLY do I need...?!
  118. 1988 Cadillac Coupe Deville Head Gasket
  119. Thermostat housing torque specs
  120. Engine compartment revisions!
  121. 1990 fleetwood engine miss please help
  122. I think I need a distributor 89 Deville 4.5
  123. A blog for Caddy fans
  124. MGB 4.5 project
  125. E52 code
  126. spark wires cover - removal help
  127. 1990 deville 4.5 won't even turn over
  128. water pump replacement
  129. Wheel Bearing installation - help....
  130. Remeber where those vac lines go.....
  131. E Codes on my 4.5 HELP
  132. E39 and E48 codes could I get some advice?
  133. Can anything go wrong/Flushing coolant?
  134. Another way to pull codes?
  135. Camshaft lifter questions
  136. exhaust manifold
  137. 4.5L ECM inputs
  138. Why I hate NTK Oxy Sensors from Now ON.
  139. Coolant pellets/conditoner
  140. Prob with 86 deville sedan with 4.9L *HELP*
  141. Ported vacuum switch--supposed to have a wire connected to it?
  142. 4.9L Aluminum Head project?
  143. Stoneage_caddy I had my car's fuel preasure checked today,have a couple of questions
  144. Anyone running an Auto meter Air/Fuel Ratio meter.
  145. What O2 sensor(s) are you using.
  146. antifreeze for my 85 fleetwoods ht4100
  147. Antifreeze for my HT4100
  148. 1989 Eldorado Biarritz MPG
  149. 1991 deville engine dies when coasting
  150. The Homemade 5 Liter PFI Project .....
  151. 85 seville valve lifters
  152. Blown 4.1 ht in 83 eldorado ?? how to tell ?
  153. Bogging problem
  154. Throttle body problem, help please
  155. I knew I saw it someplace, now where did it go, no not my sanity but close?
  156. 4.5......which sensor is bad?
  157. 4.9 bearing part number or TSB?
  158. Help with HT4100 water pump
  159. which is the better motor
  160. Nitrous Question
  161. 1995 DeVille Idle Fluctuation
  162. issues w/ back pressure?!?
  163. Well the pump is on, but my serpentine belt...what?
  164. 83 Sedan Deville 4100
  165. Its an Invasion 4.9, 5spd Stick Fiero
  166. why I love my 4.5...
  167. 1985 deville coolant and heater core questions.
  168. New member here, and I need some '93 Deville help (water pump installation)
  169. 1990 Allante Bosch fuel injectors/FiveOMotorsports
  170. Cleaning '90 EGR 4.5
  171. Groll Polluter FIXED??????????????????
  172. Where does this fuel line run?
  173. 88 Deville.Tensioner Pulley.
  174. 85 4100 is running rough and hesitating
  175. car will not go past 35mph 82 with a 4.1
  176. Does anyone have a picture or info on the Negative block ground?
  177. EGR Cleaning
  178. Cheap quality Rebuilt transmissions
  179. 4.5 Fast Idle problem
  180. I need a no Yo-Yo shift-kit immediately!! '84 RWD DeVille
  181. 93 Runs rough & loud when wet
  182. Spark Plug Replacement
  183. Fuel Injector Compatiblity
  184. Oil pan gasket
  185. No Spark/ No Start Problem/ Pulling what hair I have left out!
  186. oil change
  187. Accel fuel injectors
  188. Alldata (autozone)????????????????????
  189. A/C Compressor
  190. Help ECM E85
  191. Fuel Pumps on '82-85 HT4100 -- Life span??
  192. Analyzing Fuel Economy
  193. Difference between '82 vs '85 Fuel Injectors on the HT4100????
  194. Oil Theories
  195. Got Injectors? 4.9/4.5
  196. E048
  197. Why Wont This Car Start After I Put In A New Alternator.
  198. '85 Throttle Body in an 82 Eldo???
  199. 4.9 knocking
  200. Hole In Muffler(Recommended Replacement)
  201. 91 DeVille
  202. In reguard to my deville's rough idleing,could it just need an induction service?
  203. Code question.
  204. Plugs for 4.9
  205. 1994 Deville 4.9 (Serpentine Belt) - Save Me From the Junk Yard
  206. Inaccurate gas readout?
  207. 1990 Allante fuel injectors
  208. 4.9 with sleeves?
  209. 4.9 Air Cleaner
  210. Stoneage_caddy my deville is stuttering when idleing,any ideas?
  211. 92 4.9 fleetwood high idle
  212. 1994 4.9L won't pass emissions HCs too high How to fix?
  213. HELLO - I'm seeing an error code 52 - any idea what that means?
  214. 4100 Reliability
  215. 1982 eldorado low oiil pressure light on immediately after oil change??
  216. 82 deville VIBE SOLVED
  217. let the thing blow up??
  218. Low Oil Pressure Light 1982 eldorado
  219. engins problem
  220. radiator blew apart
  221. new to the forum - big problem
  222. Whats the best place to find a replacment 4.9
  223. RE: 82 deville
  224. 4.1 ELDO Hesitation and Stall
  225. 84 4.1 Eldo
  226. Fuel Injectors
  227. Regular gas vs. premium gas
  228. used injectors
  229. 82 deville vibration
  230. '84 Eldo Failed NOx
  231. Wow...26+ MPG in a 3900# vehicle with over 700 lbs of cargo/passengers
  232. Collapsed UPPER Rad Hose!
  233. injectors
  234. 4.9 Froze
  235. 4.1 Giving 3 codes...Need help
  236. Is the 4.9 Under Rated?
  237. I need a water pump have a couple of questions.
  238. 4.1 v6, 4.1 v8-- What's the differance?
  239. Dip Stick Tube
  240. 85 Fleetwood Brougham W/ 4100 -- No Start...
  241. Open or closed deck block
  242. Emission Results fine in set timing mode?
  243. A new problem...
  244. 4.9 Dead - How easy to swap in a 4.5?
  245. need some help
  246. What are common issues with the 4.9?
  247. injector part number
  248. Overheating not block or head 83 Brougham anyone know whats wrong?
  249. changing spark plugs
  250. A few qestions regarding timing, etc.