: HT4100 4.1, 4.5, 4.9



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