: HT4100 4.1, 4.5, 4.9



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  1. Serpentine Belt Diagram 4100
  2. OBDI vs OBDII; AC compressor
  3. idle problem
  4. 4.9 distributor bushing wear
  5. What should I do to fix my bad gas mialage (really bad)
  6. Does the fpr have to leak to be bad?
  7. What is this sensor on the back of my 4.9 motor?
  8. Need help on alighning PRNDL switch.
  9. P/N for gaskets
  10. 88 Eldorado wont start
  11. prndl code
  12. E046 message
  13. PCV pipe???
  14. 10 mpg city and its not even like a city.Can it be my fpr.
  15. car throwing codes, decypher them please :D
  16. Fuel Pressure 92 Deville
  17. performance ??? ht4100
  18. ht4100 ?????
  19. Breather on 4T60E, is there and if so where is it?
  20. 1990 deville low reading
  21. 1990 deville vacuum
  22. Throttle body gasket?
  23. 90 Deville ignition wire, cap, rotor
  24. 91 deville stumbles after warming up
  25. 83 cadillac 4.1
  26. Timing Chain
  27. Discussion about caddeville's project (split from 4.9 into 88 Eldorado)
  28. Why Wont It Start?!!!
  29. 4.9 into 88 eldorado
  30. 83'Eldorado 2 camshafts later and it wont start
  31. Northern Indiana Users?
  32. engine ping,
  33. Speed limiter...
  34. Octane and fuel prices vs performance
  35. Any fresh tips for re-manufactured 4100 seeker?
  36. 4.5 wont start after head gaskets
  37. Advancing timing, need help...
  38. Whistling Sound
  39. Comparing Dexcool and green stuff
  40. My Fuel Injectors :(
  41. Sonofabitch !!!!!!
  42. 4100 emmissions air pump
  43. 1990 deville help
  44. Power improvement... from a carburator?
  45. Sad Caddy's in the background.
  46. Water Pump for 89 DeVille
  47. Heatsoak and Starters. Is this a Caddy problem too or just Cadero's.
  48. ISC motor problem? '94 Deville
  49. 88 DeVille Serpentine Belt
  50. Noise in Transmission?
  51. Coolant Leak - How to find?
  52. Good care (ATF) for 4T60E
  53. 1994 Deville 4.9 fuel pressure
  54. Please help an old man. (Backfiring voodoo fleetwood)
  55. Please Help! 4.9 won't shift out of second gear.
  56. Tranny problems engaging
  57. 89 deville 4.5 tranny in 93 seville 4.9 will it work?
  58. Need help asap.I have a draeded p093, is my trans gone?
  59. Some people just don't want to listen
  60. 92 Deville Rough Idle Periodic Stallin
  61. (3 4.9 bad mpg.Can low ac refrigerint cause this?
  62. Need a good write up for cleaning Tb and EGR valve please (4.9)
  63. WOT with a high mileage 4.9?
  64. Is my transmission fluid ok or do I need to change it out?
  65. 4T60E transmission problem??
  66. Messed up my transmission
  67. Simple question, what does the HT stand for
  68. Emmissions Testing and the 4.9 and BC Canada guys in here
  69. Knocking
  70. Knock sensor on HT4100?
  71. Cold air zapping coil!
  72. Error code 29
  73. Replaced everything...stumble is worse.
  74. 1984 Eldo 4.1 Engine Color Needed
  75. frontend noise
  76. Fastchip - Does it work?
  77. Does everyone have mandrel-bent piping?
  78. What is the Factory Timing for a 93 Eldorado
  79. I want a DIC (get your mind out of the gutter) :D
  80. 4.9 in Brougham??
  81. engine change
  82. Ram Air/Cold air intake for 4.9?
  83. Underdrive pulleys?
  84. Braking Engine Jump... 1990 DeVille
  85. engine miss 4.5 ???
  86. '90 DeVille ISC motor problem SOLVED
  87. 94 Deville misses backfires & DIES! whats wrong
  88. Fuel injector problem?
  89. Can't get my 4.9 to Adjust timing
  90. Valve Lash Adjustment
  91. 95 4.9 flywheel breakage?
  92. Fuel Pump Relay
  93. Not getting enough spark
  94. Not again!!
  95. Oxygen Sensor
  96. 4.9L Fuel Economy
  97. HT 4100 - Success stories
  98. Gurgling Sound In Engine?
  99. Second generation HT4100
  100. 1984 Fleetwood Code 52 ECM memory reset problem
  101. 84 Eldorado No Start
  102. engine rev's and dies
  103. Engine revs when I turn the wheel????????
  104. throddle control
  105. something happened today with the 90 deville and i don't know what
  106. unique problem 4.9
  107. Stoneys Main Bearing Diary
  108. nees help fast please
  109. 4.9 timing is hard! Idles rough, stumble on acceleration
  110. Water Pump Leakage!!!
  111. Min air ????
  112. Help with a water pump installation!!
  113. How to replace water pump on 92 seville?
  114. Another TPS ?????
  115. 87 Deville 4.1- No fuel!!!!!
  116. horsepower for 4.9
  117. A question for the gurus
  118. Trans cooler leak!
  119. 1990 Cadillac Sedan Deville high idle
  120. new oils verses old oils
  121. Minimum IDLE SCREW adjustment
  122. Oil cooler line o-ring
  123. Is my ISC motor shot? ('90 4.5L)
  124. Help with identifying a GM Goodwrench replacement block.
  125. Where is the MAP sensor located ???? 84 Seville
  126. 89 Deville engine pinging under load when warm
  127. new isc and tps
  128. Code Triggered: E66
  129. Low oil pressure at idle
  130. 4.x starter interchange list
  131. 4.9 91' coupe suspension level
  132. 4100 timing question
  133. Where do these fuel lines run??
  134. 1990 Sedan Deville 4.5L A Few Questions
  135. Uneven idle
  136. Teardown set for friday ...
  137. Ac Compressor
  138. Is this repair worth it?
  139. How Hot is too hot, Ouchi Hottie story inside.
  140. 89 cadillac 4.5 oxygen sensors
  141. Bore spacing
  142. 87 Deville NO FUEL!!!!
  143. FWD HT4100 air pump pupose?
  144. pinhole in block, leaks coolant, what should I do?
  145. 4.9 Just started running rough at idle
  146. Repair cost too high?
  147. 1990 Cadillac Sedan DeVille - Idling Too High
  148. HT4100 valve train pics
  149. Thermosat Question
  150. Am I stuck having to use an 80 series muffler?
  151. Strange COOLANT SENSOR readings--And engine cuts out while driving!!!
  152. water pump
  153. Oil Pan Gasket replacement on a 4.5L
  154. Error Code E41 Camshaft Position Sensor
  155. 4.9 starter problems
  156. 94 deville runs rough at cold start
  157. So Even After $700 dollars it still leaks!
  158. Swap ?'s
  159. Emission test failure
  160. How do I get my 4.5L to coast down to the "70 mpg" benchmark?
  161. A question about the Rotella Motor Oil
  162. Pls Help 4.9 ac compressor froze
  163. Deville shakes violently .. Please help!
  164. 1993 Deville ODB Codes Tripped, Idle Motor
  165. EGR valve replacement fixed the knocking problem!
  166. water pump leaking after i change it
  167. How to enter override E.5.3 on a '90 DeVille
  168. Hose question & error code 30 and 34
  169. 87 Deville Intake
  170. 4.9 intake manifold
  171. Feels like mis-fire. 85 fleetwood 4.1
  172. Engine replacement on an 88 Coupe
  173. fuel pump?????
  174. wot's and front oil seal
  175. oil pan gaskets
  176. emissions failed
  177. Crossover pipe
  178. I got into my diagnostics w/o a clue
  179. Code P039 Current?
  180. error code
  181. Pump thingy :/ 4.1 HT
  182. Programers???
  183. first service on my 89 deville
  184. stumbling, hesitation under load only
  185. 4.9 acceleration? ? ?
  186. Head or Intake?
  187. Are 1990 Throttle bodies obsolete?
  188. 91 DeVille Stalls Repeatedly
  189. Engine Soon EGR code
  190. Motor mounts/CV Joint
  191. Motor mounts/CV Joint
  192. Motor mounts/CV Joint
  193. Deville Acclerating
  194. need help
  195. i need help
  196. 4.5 to 4.9?
  197. HT4100 MSD IGNITON, should I ?
  198. Cooling Pipe Crack
  199. HT4100 Question
  200. 4.9l bolt on mods??
  201. I hate this car.
  202. Stumbling, hesitation, backfiring 89 Deville 4.5
  203. Distributor cap wiring help!!! 4.5 litre 89 deville
  204. HT4100 vacuum pump
  205. Yet another head gasket question
  206. Fuel injection question
  207. Fuel tank baffles or pump?
  208. 88 Coupe Deville Intake Manifold or Head gasket
  209. Help required !!
  210. Crazy Cadillacs
  211. This is a weird one
  212. Ok Guys, So what parts break? Engine Wise.
  213. 91 deville runs a little hot
  214. Fuel Pump Revisited
  215. 4.9 knocking
  216. WTF? Why won't this thing just blow up...
  217. 95 deville idle problem...2
  218. Deville 4.1 fwd rear main oil seal leak :(
  219. water pumps
  220. Nasty squeal - water pump?
  221. what EXACTLY do I need...?!
  222. 1988 Cadillac Coupe Deville Head Gasket
  223. Thermostat housing torque specs
  224. Engine compartment revisions!
  225. 1990 fleetwood engine miss please help
  226. I think I need a distributor 89 Deville 4.5
  227. A blog for Caddy fans
  228. MGB 4.5 project
  229. E52 code
  230. spark wires cover - removal help
  231. 1990 deville 4.5 won't even turn over
  232. water pump replacement
  233. Wheel Bearing installation - help....
  234. Remeber where those vac lines go.....
  235. E Codes on my 4.5 HELP
  236. E39 and E48 codes could I get some advice?
  237. Can anything go wrong/Flushing coolant?
  238. Another way to pull codes?
  239. Camshaft lifter questions
  240. exhaust manifold
  241. 4.5L ECM inputs
  242. Why I hate NTK Oxy Sensors from Now ON.
  243. Coolant pellets/conditoner
  244. Prob with 86 deville sedan with 4.9L *HELP*
  245. Ported vacuum switch--supposed to have a wire connected to it?
  246. 4.9L Aluminum Head project?
  247. Stoneage_caddy I had my car's fuel preasure checked today,have a couple of questions
  248. Anyone running an Auto meter Air/Fuel Ratio meter.
  249. What O2 sensor(s) are you using.
  250. antifreeze for my 85 fleetwoods ht4100