: HT4100 4.1, 4.5, 4.9



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  1. tuning Questions for a 93 deville
  2. gas leak from cannister (85 Eldorado)
  3. High startup idle?
  4. Car wont shift on its own but shifts manually
  5. Coolant Supplement?
  6. Calling all 4.5 PFI and 4.9 PFI Owners
  7. Think the engine/tranny would last?
  8. Rocker Arm Support Part Problem-HELP?
  9. Problems w/ 4.9
  10. HT4100 Misfire Question
  11. indexing spark plugs
  12. 4.5L L (front) Cracked Header
  13. Alternator Issues--Please Help!
  14. Another Isc Question?
  15. 4.1L.. What's the problem?
  16. Best way to bleed the cooling system?
  17. car runs too rich didnt pass smog
  18. ht4100 engine cleanup. how to?
  19. Why An Aluminum Block with Iron Heads?
  20. 1985 deville runs great but
  21. 85 Seville with 4.1 Engine: Buy or Run?
  22. Anyone change the valve cover gaskets?
  23. Horrendous gas mileage
  24. Failed smog test - high CO
  25. Looking f/a 4100 4.1?
  26. 85 Deville TV Cable Adjustment
  27. fuel injection??>??
  28. 4.9L seville/deville fastchips or superchips performance chip
  29. keeps going like the energizer bunny
  30. E055 OBD1 Code
  31. Air Filter Question
  32. Serevice engine soon
  33. 4.1/4100 Distributor Hold down- how to tighten???
  34. 4.9 litre plug wire access problem.
  35. Engine mount - Any unique replacements?
  36. 4.9 Squeaking at Idle
  37. The continuing saga of my tranny problems...please help!
  38. 86 Fleetwood engine swap
  39. What senses the RPM on HT4100 engines?
  40. Open Throttle Switch Signal E27
  41. 83 FWB Idle Problems
  42. Got a code do not know what or where to check
  43. weird SES and hard start problem
  44. Sputtering, loss of power when hot
  45. Your opinion of the 4.5L V8 in the 88 DeVille
  46. oil
  47. Tranny Slipping?
  48. part identification 4.9
  49. 1992 seville 4.9 fuel filter location
  50. Good old 83' Coupe Deville
  51. new cadillac seville owner coolant flush
  52. 1993 Deville power steering pump failure
  53. ECM software
  54. 130 mph in a 4.9!
  55. Frozen Pulley
  56. Ignition Module issue
  57. Removing EGR valve - 4100
  58. Bad alternator in 93 Deville, need help
  59. Restore Lubricants
  60. Bad Head Gasket 92 DeVille 4.9- Need opinion
  61. Throttle Position Sensor Misadjusted
  62. A.I.R. Pump 4.5l '89 Deville
  63. temp sensor
  64. Don't ask oil questions on this site.
  65. 1985 deville died
  66. where do i go from here
  67. Need Help On Two More Things
  68. serious help needed
  69. 1983 Caddy transmission
  70. Strange Timing Issues
  71. Mobil 1 10W30
  72. 1985 Deville with a 4100 and it will not crank
  73. 1985 Deville with a 4100 and it will not crank
  74. Code E48 diagnosis
  75. codes ???please help
  76. 4.5 Allante intake on 93 4.9 deville
  77. New Trouble Code
  78. 1989 Caddy Deville......
  79. Throttle Body Plate issue
  80. Code and Coolant Prob.
  81. Low oil pressure!
  82. Oil Cooler Lines Leaking
  83. 1989 Caddy Deville......help!!!
  84. Stallling at idle
  85. gas pedal
  86. 4.5 TBI rough idle
  87. 94 Deville has almost no power from start
  88. 84 eldo conv't - 70 weight oil - yes or no?
  89. E012,E053 Won't run
  90. 1990 Seville Timing chain?
  91. 4.9 groaning
  92. '84 Eldo Code 44
  93. HT-4500 Starting trouble
  94. Speedometer Sensor issue ?
  95. The Ultimate FWD Cadillac Engine Swap
  96. Sticky Gas Pedal...4.5L
  97. Underhood smoking... need help with a diagnosis
  98. Fixed EGR now MPG is lower
  99. engin and trany swap for an 85 coupe deville
  100. Favorite things about the 4.9?
  101. 86 EGR Valve
  102. 4.5 TBI smoking
  103. Fuel pump on 4.9 92 Deville
  104. Fleetwood/DeVille Speedometer
  105. 4.1 Knock?? Or Tap??
  106. 1990 deville 4.5 air pump noisy
  107. 4.5L TBI Grumbling
  108. HT4500 and 4900 series Performance
  109. 4.1L injector
  110. how to get more hp from a 4100
  111. Intermittent Lurch—91 DeVille 4.9
  112. MAP Problems
  113. Oil Level
  114. How to start when very cold (less than 0 F)
  115. Need Help Please
  116. Engine surges at slow speed
  117. Stop Engine, Low Oil Pressure
  118. 1988 Fleetwood 4.5 Distributor order
  119. 1985 Seville Power Steering Pulley bolt
  120. Installing oil pump in 4.9 engine.
  121. 1985 deville ht4100 jump start
  122. GM Top End Cleaner Has Been Discontinued
  123. Makes Me Happy!
  124. HT4100 Question
  125. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  126. Makes me nervous!
  127. 4.9 E55 code. TPS?
  128. Thoughts on the 4.5
  129. power steering leakk
  130. The SEA FOAM experience thread.
  131. Oh just great, a collapsed lifter in #1 cylinder!!
  132. 94 4.9 bypass siezed A/C compressor
  133. 85 Deville Still Has Poor Performance
  134. Need exhaust manifolds 4.1 HT4100
  135. 93 Deville stalls after car warms up
  136. New Caddy Owner, Need Some Help
  137. Rattle Under Car
  138. What kind of ISC motor should i get?
  139. 84 eldorado fuse panel pictures?
  140. Crack in my Block
  141. 93 DeVille AC converter clutch bypass ???
  142. Cooling System - Water Pump Conditioner/Anti-Rust
  143. Stock Exhaust dimensions on 93 Devilles
  144. Campaign 95-C-72 (recall)
  145. fuel pressure????
  146. Just finished my 4.9 Water pump repair pics inside
  147. 4.9L Rear Oil Leak
  148. Quick question: Ignition Control Module
  149. Disaster
  150. EGR Valve
  151. 4.1 main bearing thump
  152. Tranny problems, E39!! Please help, dont want to rebuild...
  153. 95 Deville 4.9 need help
  154. OMG water pump problem!
  155. Bypass Catalytic Converter on 1993 Deville?
  156. Starter motor gone on 87 deville 4.1
  157. Need help 4.9 L Fuel Delivery problem
  158. 92 4.9 DeVille runs horrible, sets codes
  159. Roller Lifters On The 4.9?
  160. water pump change on 4.1ltr
  161. 93 deville
  162. 1993 Cadillac Seville: Please Help starting problem
  163. Bad coil?
  164. Rebuilding a tbi on 89 deville
  165. I Broke it
  166. 4.9 Surges After Hot Start
  167. Poor mileage and slighly high HC levels
  168. engine oil cooler lines
  169. Smoke out of exhaust
  170. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  171. code help
  172. Low mileage 4.9 Idling Rough Engine Sputters and quits
  173. First time Caddy owner needs some advice please
  174. Trouble with diagnostics
  175. changing oil pump in 90 deville 4.5
  176. Help I dont want to get rid of my car BUT!
  177. Has anyone changed their catalytic converter?
  178. 4.9 Liter idle
  179. Removing hydraulic fittings
  180. How many miles on the 4.9? ?
  181. 88 Sedan Deville not liking the winter
  182. Coolant hose to blower motor
  183. Timing Question
  184. '84 Eldorado blown head gasket?
  185. Oil pan heater?
  186. 4.9 Deville 95 whining noise like supercharger..
  187. Location of the CAM Position Sensor on the 95 4.9L deville?
  188. YES, i did it!!! All went well!
  189. 92 Eldo 4.9 for sale
  190. 4.5 water pump
  191. 93 4.9 STS wont start
  192. DESPERATELY Need Help!!! 85 CDV
  193. Trying to find good price on Allante gear reduction to use on my 4.9
  194. How to clean out EGR valves and throttle body?
  195. time for engine replacement soon-- help!
  196. Heater
  197. Hard starting
  198. 4.5 differences
  199. E98 rectification
  200. 87 fleetwood new ignition problem
  201. 1985 deville 4.1 Injector fuse keeps blowing
  202. PCM override, PS10
  203. EGR solenoid, is it normal?
  204. Get a LARGER capacity, 3 row radiator?
  205. Smoky when at full throttle!
  206. What does the code F.8.5 mean?
  207. 87 fleetwood 4.1 three problems,advice please!
  208. Removed Distributor--Question Before I Restart
  209. Changed the oil pump, lifter still taps on occasion warmed up..
  210. 87 deville, E48, EGR system problem
  211. Additive for newly remaned 86 DeVille Trans??
  212. Is it possible for a 4.9 main bearing thump to get progressively worse?
  213. 1989 Sedandeville issues
  214. 15W-40 Oil .....
  215. Fuel
  216. 82 eldorado alternator bracket
  217. 85 Deville ISC Problem--Might Have the Answer
  218. Help me Please!!!
  219. Weird idea
  220. Engine miss
  221. Pulled a thread
  222. E12 - No Distributor Signal???
  223. computer interchange, '90 Seville?
  224. Where Can I get some chips......
  225. Oil leak source...?
  226. well, i did it but...
  227. HT4100 ECM/BCM Problem?!
  228. #$$%^%@#$% damn .....floods on hot restart
  229. can't flush out "rubber glue type" coolant additive... what to do?
  230. Transmission Shift cable
  231. HT4100 ISC Help
  232. 4t60-E going out
  233. Fuel Issues - Please Help!
  234. 4t60-E FDR and the computer
  235. Fixed my car! Need help on one more thing...
  236. What's wrong with my car? The mystery continues...
  237. When i go to replace the mains....
  238. 4t60-E Shudder?
  239. last year
  240. All 4.x engine service parts are discontinued?
  241. Does anybody have a spare 4.9?
  242. Knock, Knock, Knock, 4.9L
  243. Alright, i'm going in!! I need a few parts and info please.
  244. 90 4.5L Idle Learn Procedure?
  245. I have a slight problem,,, HT4100
  246. Fuel Pressure Test Fitting
  247. 1985 Seville code e15
  248. Cooling Fan Module--Where can I get one?
  249. Bars Leaks Head Gasket Repair
  250. Code E30 on 85 Deville and Vacuum Pumps