: HT4100 4.1, 4.5, 4.9



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