: HT4100 4.1, 4.5, 4.9



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