: HT4100 4.1, 4.5, 4.9



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  1. 4.9 instead of 4.5??
  2. 88 cdv
  3. Should I buy a car with a 4.1 L Engine?
  4. Ok ive given up on this engine.
  5. Oil test shows coolant contamination in 4.9!
  6. Need 2 things please...
  7. honest mpg of 4.9 city driving survey
  8. transmission bump on downshift
  9. ISC motor 1993 Deville
  10. Think i messed something up
  11. A little help needed identifying a loose connector
  12. Intermittent ISC? TPS? Problem still
  13. 4.9 STILL runs rough sets codes
  14. TPS Question
  15. Maitenance Questions, 4.9L 1993 Deville
  16. loud rumble now when stopping now
  17. 4.1L Oil Cooler path through Radiator
  18. Can overheating a 4.9L once damage your headgaskets?
  19. 4.9L: original red/blue A/C valve caps?
  20. Better intake for the 4.1L
  21. Idle is too high now
  22. Slight fuel leak at TBI
  23. Check Vehicle Light
  24. Setting Timing on '84 HT4100 4.1L
  25. tuning Questions for a 93 deville
  26. gas leak from cannister (85 Eldorado)
  27. High startup idle?
  28. Car wont shift on its own but shifts manually
  29. Coolant Supplement?
  30. Calling all 4.5 PFI and 4.9 PFI Owners
  31. Think the engine/tranny would last?
  32. Rocker Arm Support Part Problem-HELP?
  33. Problems w/ 4.9
  34. HT4100 Misfire Question
  35. indexing spark plugs
  36. 4.5L L (front) Cracked Header
  37. Alternator Issues--Please Help!
  38. Another Isc Question?
  39. 4.1L.. What's the problem?
  40. Best way to bleed the cooling system?
  41. car runs too rich didnt pass smog
  42. ht4100 engine cleanup. how to?
  43. Why An Aluminum Block with Iron Heads?
  44. 1985 deville runs great but
  45. 85 Seville with 4.1 Engine: Buy or Run?
  46. Anyone change the valve cover gaskets?
  47. Horrendous gas mileage
  48. Failed smog test - high CO
  49. Looking f/a 4100 4.1?
  50. 85 Deville TV Cable Adjustment
  51. fuel injection??>??
  52. 4.9L seville/deville fastchips or superchips performance chip
  53. keeps going like the energizer bunny
  54. E055 OBD1 Code
  55. Air Filter Question
  56. Serevice engine soon
  57. 4.1/4100 Distributor Hold down- how to tighten???
  58. 4.9 litre plug wire access problem.
  59. Engine mount - Any unique replacements?
  60. 4.9 Squeaking at Idle
  61. The continuing saga of my tranny problems...please help!
  62. 86 Fleetwood engine swap
  63. What senses the RPM on HT4100 engines?
  64. Open Throttle Switch Signal E27
  65. 83 FWB Idle Problems
  66. Got a code do not know what or where to check
  67. weird SES and hard start problem
  68. Sputtering, loss of power when hot
  69. Your opinion of the 4.5L V8 in the 88 DeVille
  70. oil
  71. Tranny Slipping?
  72. part identification 4.9
  73. 1992 seville 4.9 fuel filter location
  74. Good old 83' Coupe Deville
  75. new cadillac seville owner coolant flush
  76. 1993 Deville power steering pump failure
  77. ECM software
  78. 130 mph in a 4.9!
  79. Frozen Pulley
  80. Ignition Module issue
  81. Removing EGR valve - 4100
  82. Bad alternator in 93 Deville, need help
  83. Restore Lubricants
  84. Bad Head Gasket 92 DeVille 4.9- Need opinion
  85. Throttle Position Sensor Misadjusted
  86. A.I.R. Pump 4.5l '89 Deville
  87. temp sensor
  88. Don't ask oil questions on this site.
  89. 1985 deville died
  90. where do i go from here
  91. Need Help On Two More Things
  92. serious help needed
  93. 1983 Caddy transmission
  94. Strange Timing Issues
  95. Mobil 1 10W30
  96. 1985 Deville with a 4100 and it will not crank
  97. 1985 Deville with a 4100 and it will not crank
  98. Code E48 diagnosis
  99. codes ???please help
  100. 4.5 Allante intake on 93 4.9 deville
  101. New Trouble Code
  102. 1989 Caddy Deville......
  103. Throttle Body Plate issue
  104. Code and Coolant Prob.
  105. Low oil pressure!
  106. Oil Cooler Lines Leaking
  107. 1989 Caddy Deville......help!!!
  108. Stallling at idle
  109. gas pedal
  110. 4.5 TBI rough idle
  111. 94 Deville has almost no power from start
  112. 84 eldo conv't - 70 weight oil - yes or no?
  113. E012,E053 Won't run
  114. 1990 Seville Timing chain?
  115. 4.9 groaning
  116. '84 Eldo Code 44
  117. HT-4500 Starting trouble
  118. Speedometer Sensor issue ?
  119. The Ultimate FWD Cadillac Engine Swap
  120. Sticky Gas Pedal...4.5L
  121. Underhood smoking... need help with a diagnosis
  122. Fixed EGR now MPG is lower
  123. engin and trany swap for an 85 coupe deville
  124. Favorite things about the 4.9?
  125. 86 EGR Valve
  126. 4.5 TBI smoking
  127. Fuel pump on 4.9 92 Deville
  128. Fleetwood/DeVille Speedometer
  129. 4.1 Knock?? Or Tap??
  130. 1990 deville 4.5 air pump noisy
  131. 4.5L TBI Grumbling
  132. HT4500 and 4900 series Performance
  133. 4.1L injector
  134. how to get more hp from a 4100
  135. Intermittent Lurch—91 DeVille 4.9
  136. MAP Problems
  137. Oil Level
  138. How to start when very cold (less than 0 F)
  139. Need Help Please
  140. Engine surges at slow speed
  141. Stop Engine, Low Oil Pressure
  142. 1988 Fleetwood 4.5 Distributor order
  143. 1985 Seville Power Steering Pulley bolt
  144. Installing oil pump in 4.9 engine.
  145. 1985 deville ht4100 jump start
  146. GM Top End Cleaner Has Been Discontinued
  147. Makes Me Happy!
  148. HT4100 Question
  149. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  150. Makes me nervous!
  151. 4.9 E55 code. TPS?
  152. Thoughts on the 4.5
  153. power steering leakk
  154. The SEA FOAM experience thread.
  155. Oh just great, a collapsed lifter in #1 cylinder!!
  156. 94 4.9 bypass siezed A/C compressor
  157. 85 Deville Still Has Poor Performance
  158. Need exhaust manifolds 4.1 HT4100
  159. 93 Deville stalls after car warms up
  160. New Caddy Owner, Need Some Help
  161. Rattle Under Car
  162. What kind of ISC motor should i get?
  163. 84 eldorado fuse panel pictures?
  164. Crack in my Block
  165. 93 DeVille AC converter clutch bypass ???
  166. Cooling System - Water Pump Conditioner/Anti-Rust
  167. Stock Exhaust dimensions on 93 Devilles
  168. Campaign 95-C-72 (recall)
  169. fuel pressure????
  170. Just finished my 4.9 Water pump repair pics inside
  171. 4.9L Rear Oil Leak
  172. Quick question: Ignition Control Module
  173. Disaster
  174. EGR Valve
  175. 4.1 main bearing thump
  176. Tranny problems, E39!! Please help, dont want to rebuild...
  177. 95 Deville 4.9 need help
  178. OMG water pump problem!
  179. Bypass Catalytic Converter on 1993 Deville?
  180. Starter motor gone on 87 deville 4.1
  181. Need help 4.9 L Fuel Delivery problem
  182. 92 4.9 DeVille runs horrible, sets codes
  183. Roller Lifters On The 4.9?
  184. water pump change on 4.1ltr
  185. 93 deville
  186. 1993 Cadillac Seville: Please Help starting problem
  187. Bad coil?
  188. Rebuilding a tbi on 89 deville
  189. I Broke it
  190. 4.9 Surges After Hot Start
  191. Poor mileage and slighly high HC levels
  192. engine oil cooler lines
  193. Smoke out of exhaust
  194. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  195. code help
  196. Low mileage 4.9 Idling Rough Engine Sputters and quits
  197. First time Caddy owner needs some advice please
  198. Trouble with diagnostics
  199. changing oil pump in 90 deville 4.5
  200. Help I dont want to get rid of my car BUT!
  201. Has anyone changed their catalytic converter?
  202. 4.9 Liter idle
  203. Removing hydraulic fittings
  204. How many miles on the 4.9? ?
  205. 88 Sedan Deville not liking the winter
  206. Coolant hose to blower motor
  207. Timing Question
  208. '84 Eldorado blown head gasket?
  209. Oil pan heater?
  210. 4.9 Deville 95 whining noise like supercharger..
  211. Location of the CAM Position Sensor on the 95 4.9L deville?
  212. YES, i did it!!! All went well!
  213. 92 Eldo 4.9 for sale
  214. 4.5 water pump
  215. 93 4.9 STS wont start
  216. DESPERATELY Need Help!!! 85 CDV
  217. Trying to find good price on Allante gear reduction to use on my 4.9
  218. How to clean out EGR valves and throttle body?
  219. time for engine replacement soon-- help!
  220. Heater
  221. Hard starting
  222. 4.5 differences
  223. E98 rectification
  224. 87 fleetwood new ignition problem
  225. 1985 deville 4.1 Injector fuse keeps blowing
  226. PCM override, PS10
  227. EGR solenoid, is it normal?
  228. Get a LARGER capacity, 3 row radiator?
  229. Smoky when at full throttle!
  230. What does the code F.8.5 mean?
  231. 87 fleetwood 4.1 three problems,advice please!
  232. Removed Distributor--Question Before I Restart
  233. Changed the oil pump, lifter still taps on occasion warmed up..
  234. 87 deville, E48, EGR system problem
  235. Additive for newly remaned 86 DeVille Trans??
  236. Is it possible for a 4.9 main bearing thump to get progressively worse?
  237. 1989 Sedandeville issues
  238. 15W-40 Oil .....
  239. Fuel
  240. 82 eldorado alternator bracket
  241. 85 Deville ISC Problem--Might Have the Answer
  242. Help me Please!!!
  243. Weird idea
  244. Engine miss
  245. Pulled a thread
  246. E12 - No Distributor Signal???
  247. computer interchange, '90 Seville?
  248. Where Can I get some chips......
  249. Oil leak source...?
  250. well, i did it but...