: HT4100 4.1, 4.5, 4.9



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