: HT4100 4.1, 4.5, 4.9



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  1. 4.1L Oil Cooler path through Radiator
  2. Can overheating a 4.9L once damage your headgaskets?
  3. 4.9L: original red/blue A/C valve caps?
  4. Better intake for the 4.1L
  5. Idle is too high now
  6. Slight fuel leak at TBI
  7. Check Vehicle Light
  8. Setting Timing on '84 HT4100 4.1L
  9. tuning Questions for a 93 deville
  10. gas leak from cannister (85 Eldorado)
  11. High startup idle?
  12. Car wont shift on its own but shifts manually
  13. Coolant Supplement?
  14. Calling all 4.5 PFI and 4.9 PFI Owners
  15. Think the engine/tranny would last?
  16. Rocker Arm Support Part Problem-HELP?
  17. Problems w/ 4.9
  18. HT4100 Misfire Question
  19. indexing spark plugs
  20. 4.5L L (front) Cracked Header
  21. Alternator Issues--Please Help!
  22. Another Isc Question?
  23. 4.1L.. What's the problem?
  24. Best way to bleed the cooling system?
  25. car runs too rich didnt pass smog
  26. ht4100 engine cleanup. how to?
  27. Why An Aluminum Block with Iron Heads?
  28. 1985 deville runs great but
  29. 85 Seville with 4.1 Engine: Buy or Run?
  30. Anyone change the valve cover gaskets?
  31. Horrendous gas mileage
  32. Failed smog test - high CO
  33. Looking f/a 4100 4.1?
  34. 85 Deville TV Cable Adjustment
  35. fuel injection??>??
  36. 4.9L seville/deville fastchips or superchips performance chip
  37. keeps going like the energizer bunny
  38. E055 OBD1 Code
  39. Air Filter Question
  40. Serevice engine soon
  41. 4.1/4100 Distributor Hold down- how to tighten???
  42. 4.9 litre plug wire access problem.
  43. Engine mount - Any unique replacements?
  44. 4.9 Squeaking at Idle
  45. The continuing saga of my tranny problems...please help!
  46. 86 Fleetwood engine swap
  47. What senses the RPM on HT4100 engines?
  48. Open Throttle Switch Signal E27
  49. 83 FWB Idle Problems
  50. Got a code do not know what or where to check
  51. weird SES and hard start problem
  52. Sputtering, loss of power when hot
  53. Your opinion of the 4.5L V8 in the 88 DeVille
  54. oil
  55. Tranny Slipping?
  56. part identification 4.9
  57. 1992 seville 4.9 fuel filter location
  58. Good old 83' Coupe Deville
  59. new cadillac seville owner coolant flush
  60. 1993 Deville power steering pump failure
  61. ECM software
  62. 130 mph in a 4.9!
  63. Frozen Pulley
  64. Ignition Module issue
  65. Removing EGR valve - 4100
  66. Bad alternator in 93 Deville, need help
  67. Restore Lubricants
  68. Bad Head Gasket 92 DeVille 4.9- Need opinion
  69. Throttle Position Sensor Misadjusted
  70. A.I.R. Pump 4.5l '89 Deville
  71. temp sensor
  72. Don't ask oil questions on this site.
  73. 1985 deville died
  74. where do i go from here
  75. Need Help On Two More Things
  76. serious help needed
  77. 1983 Caddy transmission
  78. Strange Timing Issues
  79. Mobil 1 10W30
  80. 1985 Deville with a 4100 and it will not crank
  81. 1985 Deville with a 4100 and it will not crank
  82. Code E48 diagnosis
  83. codes ???please help
  84. 4.5 Allante intake on 93 4.9 deville
  85. New Trouble Code
  86. 1989 Caddy Deville......
  87. Throttle Body Plate issue
  88. Code and Coolant Prob.
  89. Low oil pressure!
  90. Oil Cooler Lines Leaking
  91. 1989 Caddy Deville......help!!!
  92. Stallling at idle
  93. gas pedal
  94. 4.5 TBI rough idle
  95. 94 Deville has almost no power from start
  96. 84 eldo conv't - 70 weight oil - yes or no?
  97. E012,E053 Won't run
  98. 1990 Seville Timing chain?
  99. 4.9 groaning
  100. '84 Eldo Code 44
  101. HT-4500 Starting trouble
  102. Speedometer Sensor issue ?
  103. The Ultimate FWD Cadillac Engine Swap
  104. Sticky Gas Pedal...4.5L
  105. Underhood smoking... need help with a diagnosis
  106. Fixed EGR now MPG is lower
  107. engin and trany swap for an 85 coupe deville
  108. Favorite things about the 4.9?
  109. 86 EGR Valve
  110. 4.5 TBI smoking
  111. Fuel pump on 4.9 92 Deville
  112. Fleetwood/DeVille Speedometer
  113. 4.1 Knock?? Or Tap??
  114. 1990 deville 4.5 air pump noisy
  115. 4.5L TBI Grumbling
  116. HT4500 and 4900 series Performance
  117. 4.1L injector
  118. how to get more hp from a 4100
  119. Intermittent Lurch—91 DeVille 4.9
  120. MAP Problems
  121. Oil Level
  122. How to start when very cold (less than 0 F)
  123. Need Help Please
  124. Engine surges at slow speed
  125. Stop Engine, Low Oil Pressure
  126. 1988 Fleetwood 4.5 Distributor order
  127. 1985 Seville Power Steering Pulley bolt
  128. Installing oil pump in 4.9 engine.
  129. 1985 deville ht4100 jump start
  130. GM Top End Cleaner Has Been Discontinued
  131. Makes Me Happy!
  132. HT4100 Question
  133. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  134. Makes me nervous!
  135. 4.9 E55 code. TPS?
  136. Thoughts on the 4.5
  137. power steering leakk
  138. The SEA FOAM experience thread.
  139. Oh just great, a collapsed lifter in #1 cylinder!!
  140. 94 4.9 bypass siezed A/C compressor
  141. 85 Deville Still Has Poor Performance
  142. Need exhaust manifolds 4.1 HT4100
  143. 93 Deville stalls after car warms up
  144. New Caddy Owner, Need Some Help
  145. Rattle Under Car
  146. What kind of ISC motor should i get?
  147. 84 eldorado fuse panel pictures?
  148. Crack in my Block
  149. 93 DeVille AC converter clutch bypass ???
  150. Cooling System - Water Pump Conditioner/Anti-Rust
  151. Stock Exhaust dimensions on 93 Devilles
  152. Campaign 95-C-72 (recall)
  153. fuel pressure????
  154. Just finished my 4.9 Water pump repair pics inside
  155. 4.9L Rear Oil Leak
  156. Quick question: Ignition Control Module
  157. Disaster
  158. EGR Valve
  159. 4.1 main bearing thump
  160. Tranny problems, E39!! Please help, dont want to rebuild...
  161. 95 Deville 4.9 need help
  162. OMG water pump problem!
  163. Bypass Catalytic Converter on 1993 Deville?
  164. Starter motor gone on 87 deville 4.1
  165. Need help 4.9 L Fuel Delivery problem
  166. 92 4.9 DeVille runs horrible, sets codes
  167. Roller Lifters On The 4.9?
  168. water pump change on 4.1ltr
  169. 93 deville
  170. 1993 Cadillac Seville: Please Help starting problem
  171. Bad coil?
  172. Rebuilding a tbi on 89 deville
  173. I Broke it
  174. 4.9 Surges After Hot Start
  175. Poor mileage and slighly high HC levels
  176. engine oil cooler lines
  177. Smoke out of exhaust
  178. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  179. code help
  180. Low mileage 4.9 Idling Rough Engine Sputters and quits
  181. First time Caddy owner needs some advice please
  182. Trouble with diagnostics
  183. changing oil pump in 90 deville 4.5
  184. Help I dont want to get rid of my car BUT!
  185. Has anyone changed their catalytic converter?
  186. 4.9 Liter idle
  187. Removing hydraulic fittings
  188. How many miles on the 4.9? ?
  189. 88 Sedan Deville not liking the winter
  190. Coolant hose to blower motor
  191. Timing Question
  192. '84 Eldorado blown head gasket?
  193. Oil pan heater?
  194. 4.9 Deville 95 whining noise like supercharger..
  195. Location of the CAM Position Sensor on the 95 4.9L deville?
  196. YES, i did it!!! All went well!
  197. 92 Eldo 4.9 for sale
  198. 4.5 water pump
  199. 93 4.9 STS wont start
  200. DESPERATELY Need Help!!! 85 CDV
  201. Trying to find good price on Allante gear reduction to use on my 4.9
  202. How to clean out EGR valves and throttle body?
  203. time for engine replacement soon-- help!
  204. Heater
  205. Hard starting
  206. 4.5 differences
  207. E98 rectification
  208. 87 fleetwood new ignition problem
  209. 1985 deville 4.1 Injector fuse keeps blowing
  210. PCM override, PS10
  211. EGR solenoid, is it normal?
  212. Get a LARGER capacity, 3 row radiator?
  213. Smoky when at full throttle!
  214. What does the code F.8.5 mean?
  215. 87 fleetwood 4.1 three problems,advice please!
  216. Removed Distributor--Question Before I Restart
  217. Changed the oil pump, lifter still taps on occasion warmed up..
  218. 87 deville, E48, EGR system problem
  219. Additive for newly remaned 86 DeVille Trans??
  220. Is it possible for a 4.9 main bearing thump to get progressively worse?
  221. 1989 Sedandeville issues
  222. 15W-40 Oil .....
  223. Fuel
  224. 82 eldorado alternator bracket
  225. 85 Deville ISC Problem--Might Have the Answer
  226. Help me Please!!!
  227. Weird idea
  228. Engine miss
  229. Pulled a thread
  230. E12 - No Distributor Signal???
  231. computer interchange, '90 Seville?
  232. Where Can I get some chips......
  233. Oil leak source...?
  234. well, i did it but...
  235. HT4100 ECM/BCM Problem?!
  236. #$$%^%@#$% damn .....floods on hot restart
  237. can't flush out "rubber glue type" coolant additive... what to do?
  238. Transmission Shift cable
  239. HT4100 ISC Help
  240. 4t60-E going out
  241. Fuel Issues - Please Help!
  242. 4t60-E FDR and the computer
  243. Fixed my car! Need help on one more thing...
  244. What's wrong with my car? The mystery continues...
  245. When i go to replace the mains....
  246. 4t60-E Shudder?
  247. last year
  248. All 4.x engine service parts are discontinued?
  249. Does anybody have a spare 4.9?
  250. Knock, Knock, Knock, 4.9L