: HT4100 4.1, 4.5, 4.9



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  1. Need help
  2. Need a little help
  3. No Spark
  4. Normal??
  5. Coolant Questions
  6. Another tip for 4.x car owners
  7. Trans Fluid Capacity, '93 Deville, 4.9
  8. dumb question, anyone know where the pcv is on a 4.9?
  9. 4.9 hesitates on highway
  10. How many miles can you expect out of a 4.9 engine and transmission?
  11. 4.9 Exhaust Note
  12. 4.9 Will Not Idle Below 2500rpm!
  13. Engine miss.......AGAIN
  14. Ht4100 V8
  15. Need transmission advice, please!
  16. Not Sure What Engine I have
  17. Turbo Muffler on a 4.9
  18. Premium Fuel in the 4.9?
  19. Ht4100
  20. HT4100 v8 frd eldorado
  21. Alternator issues
  22. HT4100 Hesitation Advice
  23. A/C Recharge
  24. Anyone change a starter on a FWD 4100?
  25. ac problems
  26. 1991 Seville
  27. 1985 Eldorado thinks it a diesel?
  28. 4.9 Problems at Wide Open Throttle
  29. Eldorado and the 4.1 engine ... ????
  30. HT 4100: Avoid at all costs????? Help!
  31. Changed PCV Valve at 98k Miles
  32. Engine Noise
  33. Speed Limiter
  34. Starter/voltage problem...
  35. engine swaps - 4500, 4900, 4100 engines
  36. Service Engine Light
  37. tachometer [jumps] 4.9 Seville
  38. boost HP on a 4.9 in my 1992 seville
  39. 83 Coupe Deville hard code 33 problems
  40. 4.9 shudder when at idle
  41. Possible injector leaks?
  42. Out of no where, my 92 Eldo did not start today.
  43. HT4100 Engine 250V8
  44. Help with and '89 Deville w/4.5L
  45. Tune-up questions, spark plugs
  46. Mystery Grind in Transmission, Engine, Where?
  47. 85 Deville 4100 Driveability
  48. I dread turning this car off!
  49. 4.9 instead of 4.5??
  50. 88 cdv
  51. Should I buy a car with a 4.1 L Engine?
  52. Ok ive given up on this engine.
  53. Oil test shows coolant contamination in 4.9!
  54. Need 2 things please...
  55. honest mpg of 4.9 city driving survey
  56. transmission bump on downshift
  57. ISC motor 1993 Deville
  58. Think i messed something up
  59. A little help needed identifying a loose connector
  60. Intermittent ISC? TPS? Problem still
  61. 4.9 STILL runs rough sets codes
  62. TPS Question
  63. Maitenance Questions, 4.9L 1993 Deville
  64. loud rumble now when stopping now
  65. 4.1L Oil Cooler path through Radiator
  66. Can overheating a 4.9L once damage your headgaskets?
  67. 4.9L: original red/blue A/C valve caps?
  68. Better intake for the 4.1L
  69. Idle is too high now
  70. Slight fuel leak at TBI
  71. Check Vehicle Light
  72. Setting Timing on '84 HT4100 4.1L
  73. tuning Questions for a 93 deville
  74. gas leak from cannister (85 Eldorado)
  75. High startup idle?
  76. Car wont shift on its own but shifts manually
  77. Coolant Supplement?
  78. Calling all 4.5 PFI and 4.9 PFI Owners
  79. Think the engine/tranny would last?
  80. Rocker Arm Support Part Problem-HELP?
  81. Problems w/ 4.9
  82. HT4100 Misfire Question
  83. indexing spark plugs
  84. 4.5L L (front) Cracked Header
  85. Alternator Issues--Please Help!
  86. Another Isc Question?
  87. 4.1L.. What's the problem?
  88. Best way to bleed the cooling system?
  89. car runs too rich didnt pass smog
  90. ht4100 engine cleanup. how to?
  91. Why An Aluminum Block with Iron Heads?
  92. 1985 deville runs great but
  93. 85 Seville with 4.1 Engine: Buy or Run?
  94. Anyone change the valve cover gaskets?
  95. Horrendous gas mileage
  96. Failed smog test - high CO
  97. Looking f/a 4100 4.1?
  98. 85 Deville TV Cable Adjustment
  99. fuel injection??>??
  100. 4.9L seville/deville fastchips or superchips performance chip
  101. keeps going like the energizer bunny
  102. E055 OBD1 Code
  103. Air Filter Question
  104. Serevice engine soon
  105. 4.1/4100 Distributor Hold down- how to tighten???
  106. 4.9 litre plug wire access problem.
  107. Engine mount - Any unique replacements?
  108. 4.9 Squeaking at Idle
  109. The continuing saga of my tranny problems...please help!
  110. 86 Fleetwood engine swap
  111. What senses the RPM on HT4100 engines?
  112. Open Throttle Switch Signal E27
  113. 83 FWB Idle Problems
  114. Got a code do not know what or where to check
  115. weird SES and hard start problem
  116. Sputtering, loss of power when hot
  117. Your opinion of the 4.5L V8 in the 88 DeVille
  118. oil
  119. Tranny Slipping?
  120. part identification 4.9
  121. 1992 seville 4.9 fuel filter location
  122. Good old 83' Coupe Deville
  123. new cadillac seville owner coolant flush
  124. 1993 Deville power steering pump failure
  125. ECM software
  126. 130 mph in a 4.9!
  127. Frozen Pulley
  128. Ignition Module issue
  129. Removing EGR valve - 4100
  130. Bad alternator in 93 Deville, need help
  131. Restore Lubricants
  132. Bad Head Gasket 92 DeVille 4.9- Need opinion
  133. Throttle Position Sensor Misadjusted
  134. A.I.R. Pump 4.5l '89 Deville
  135. temp sensor
  136. Don't ask oil questions on this site.
  137. 1985 deville died
  138. where do i go from here
  139. Need Help On Two More Things
  140. serious help needed
  141. 1983 Caddy transmission
  142. Strange Timing Issues
  143. Mobil 1 10W30
  144. 1985 Deville with a 4100 and it will not crank
  145. 1985 Deville with a 4100 and it will not crank
  146. Code E48 diagnosis
  147. codes ???please help
  148. 4.5 Allante intake on 93 4.9 deville
  149. New Trouble Code
  150. 1989 Caddy Deville......
  151. Throttle Body Plate issue
  152. Code and Coolant Prob.
  153. Low oil pressure!
  154. Oil Cooler Lines Leaking
  155. 1989 Caddy Deville......help!!!
  156. Stallling at idle
  157. gas pedal
  158. 4.5 TBI rough idle
  159. 94 Deville has almost no power from start
  160. 84 eldo conv't - 70 weight oil - yes or no?
  161. E012,E053 Won't run
  162. 1990 Seville Timing chain?
  163. 4.9 groaning
  164. '84 Eldo Code 44
  165. HT-4500 Starting trouble
  166. Speedometer Sensor issue ?
  167. The Ultimate FWD Cadillac Engine Swap
  168. Sticky Gas Pedal...4.5L
  169. Underhood smoking... need help with a diagnosis
  170. Fixed EGR now MPG is lower
  171. engin and trany swap for an 85 coupe deville
  172. Favorite things about the 4.9?
  173. 86 EGR Valve
  174. 4.5 TBI smoking
  175. Fuel pump on 4.9 92 Deville
  176. Fleetwood/DeVille Speedometer
  177. 4.1 Knock?? Or Tap??
  178. 1990 deville 4.5 air pump noisy
  179. 4.5L TBI Grumbling
  180. HT4500 and 4900 series Performance
  181. 4.1L injector
  182. how to get more hp from a 4100
  183. Intermittent Lurch—91 DeVille 4.9
  184. MAP Problems
  185. Oil Level
  186. How to start when very cold (less than 0 F)
  187. Need Help Please
  188. Engine surges at slow speed
  189. Stop Engine, Low Oil Pressure
  190. 1988 Fleetwood 4.5 Distributor order
  191. 1985 Seville Power Steering Pulley bolt
  192. Installing oil pump in 4.9 engine.
  193. 1985 deville ht4100 jump start
  194. GM Top End Cleaner Has Been Discontinued
  195. Makes Me Happy!
  196. HT4100 Question
  197. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  198. Makes me nervous!
  199. 4.9 E55 code. TPS?
  200. Thoughts on the 4.5
  201. power steering leakk
  202. The SEA FOAM experience thread.
  203. Oh just great, a collapsed lifter in #1 cylinder!!
  204. 94 4.9 bypass siezed A/C compressor
  205. 85 Deville Still Has Poor Performance
  206. Need exhaust manifolds 4.1 HT4100
  207. 93 Deville stalls after car warms up
  208. New Caddy Owner, Need Some Help
  209. Rattle Under Car
  210. What kind of ISC motor should i get?
  211. 84 eldorado fuse panel pictures?
  212. Crack in my Block
  213. 93 DeVille AC converter clutch bypass ???
  214. Cooling System - Water Pump Conditioner/Anti-Rust
  215. Stock Exhaust dimensions on 93 Devilles
  216. Campaign 95-C-72 (recall)
  217. fuel pressure????
  218. Just finished my 4.9 Water pump repair pics inside
  219. 4.9L Rear Oil Leak
  220. Quick question: Ignition Control Module
  221. Disaster
  222. EGR Valve
  223. 4.1 main bearing thump
  224. Tranny problems, E39!! Please help, dont want to rebuild...
  225. 95 Deville 4.9 need help
  226. OMG water pump problem!
  227. Bypass Catalytic Converter on 1993 Deville?
  228. Starter motor gone on 87 deville 4.1
  229. Need help 4.9 L Fuel Delivery problem
  230. 92 4.9 DeVille runs horrible, sets codes
  231. Roller Lifters On The 4.9?
  232. water pump change on 4.1ltr
  233. 93 deville
  234. 1993 Cadillac Seville: Please Help starting problem
  235. Bad coil?
  236. Rebuilding a tbi on 89 deville
  237. I Broke it
  238. 4.9 Surges After Hot Start
  239. Poor mileage and slighly high HC levels
  240. engine oil cooler lines
  241. Smoke out of exhaust
  242. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  243. code help
  244. Low mileage 4.9 Idling Rough Engine Sputters and quits
  245. First time Caddy owner needs some advice please
  246. Trouble with diagnostics
  247. changing oil pump in 90 deville 4.5
  248. Help I dont want to get rid of my car BUT!
  249. Has anyone changed their catalytic converter?
  250. 4.9 Liter idle