: HT4100 4.1, 4.5, 4.9



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