: HT4100 4.1, 4.5, 4.9



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