: HT4100 4.1, 4.5, 4.9



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  1. 4.9L 1991 Seville driving me crazy - won't start
  2. Fuel Data Center Answers
  3. PCV valve location on 4.9 litre.
  4. HT4100 Driveability Question/Problem
  5. Replacing water pump on '87 4100 - tips?
  6. Plug Wire Order-87 Ht4100
  7. intermittent miss and other weird happenings
  8. 4.5 Cooling System Woes...
  9. HT4100 SYSTEM PROBLEM E047 and B334
  10. Is lifter tick normal on a 4.9?
  11. Coolant and Supplement Change Intervals
  12. 4.1 v8 injector resistance
  13. OIL cooler lines leaking
  14. engine oil
  15. Need help
  16. Need a little help
  17. No Spark
  18. Normal??
  19. Coolant Questions
  20. Another tip for 4.x car owners
  21. Trans Fluid Capacity, '93 Deville, 4.9
  22. dumb question, anyone know where the pcv is on a 4.9?
  23. 4.9 hesitates on highway
  24. How many miles can you expect out of a 4.9 engine and transmission?
  25. 4.9 Exhaust Note
  26. 4.9 Will Not Idle Below 2500rpm!
  27. Engine miss.......AGAIN
  28. Ht4100 V8
  29. Need transmission advice, please!
  30. Not Sure What Engine I have
  31. Turbo Muffler on a 4.9
  32. Premium Fuel in the 4.9?
  33. Ht4100
  34. HT4100 v8 frd eldorado
  35. Alternator issues
  36. HT4100 Hesitation Advice
  37. A/C Recharge
  38. Anyone change a starter on a FWD 4100?
  39. ac problems
  40. 1991 Seville
  41. 1985 Eldorado thinks it a diesel?
  42. 4.9 Problems at Wide Open Throttle
  43. Eldorado and the 4.1 engine ... ????
  44. HT 4100: Avoid at all costs????? Help!
  45. Changed PCV Valve at 98k Miles
  46. Engine Noise
  47. Speed Limiter
  48. Starter/voltage problem...
  49. engine swaps - 4500, 4900, 4100 engines
  50. Service Engine Light
  51. tachometer [jumps] 4.9 Seville
  52. boost HP on a 4.9 in my 1992 seville
  53. 83 Coupe Deville hard code 33 problems
  54. 4.9 shudder when at idle
  55. Possible injector leaks?
  56. Out of no where, my 92 Eldo did not start today.
  57. HT4100 Engine 250V8
  58. Help with and '89 Deville w/4.5L
  59. Tune-up questions, spark plugs
  60. Mystery Grind in Transmission, Engine, Where?
  61. 85 Deville 4100 Driveability
  62. I dread turning this car off!
  63. 4.9 instead of 4.5??
  64. 88 cdv
  65. Should I buy a car with a 4.1 L Engine?
  66. Ok ive given up on this engine.
  67. Oil test shows coolant contamination in 4.9!
  68. Need 2 things please...
  69. honest mpg of 4.9 city driving survey
  70. transmission bump on downshift
  71. ISC motor 1993 Deville
  72. Think i messed something up
  73. A little help needed identifying a loose connector
  74. Intermittent ISC? TPS? Problem still
  75. 4.9 STILL runs rough sets codes
  76. TPS Question
  77. Maitenance Questions, 4.9L 1993 Deville
  78. loud rumble now when stopping now
  79. 4.1L Oil Cooler path through Radiator
  80. Can overheating a 4.9L once damage your headgaskets?
  81. 4.9L: original red/blue A/C valve caps?
  82. Better intake for the 4.1L
  83. Idle is too high now
  84. Slight fuel leak at TBI
  85. Check Vehicle Light
  86. Setting Timing on '84 HT4100 4.1L
  87. tuning Questions for a 93 deville
  88. gas leak from cannister (85 Eldorado)
  89. High startup idle?
  90. Car wont shift on its own but shifts manually
  91. Coolant Supplement?
  92. Calling all 4.5 PFI and 4.9 PFI Owners
  93. Think the engine/tranny would last?
  94. Rocker Arm Support Part Problem-HELP?
  95. Problems w/ 4.9
  96. HT4100 Misfire Question
  97. indexing spark plugs
  98. 4.5L L (front) Cracked Header
  99. Alternator Issues--Please Help!
  100. Another Isc Question?
  101. 4.1L.. What's the problem?
  102. Best way to bleed the cooling system?
  103. car runs too rich didnt pass smog
  104. ht4100 engine cleanup. how to?
  105. Why An Aluminum Block with Iron Heads?
  106. 1985 deville runs great but
  107. 85 Seville with 4.1 Engine: Buy or Run?
  108. Anyone change the valve cover gaskets?
  109. Horrendous gas mileage
  110. Failed smog test - high CO
  111. Looking f/a 4100 4.1?
  112. 85 Deville TV Cable Adjustment
  113. fuel injection??>??
  114. 4.9L seville/deville fastchips or superchips performance chip
  115. keeps going like the energizer bunny
  116. E055 OBD1 Code
  117. Air Filter Question
  118. Serevice engine soon
  119. 4.1/4100 Distributor Hold down- how to tighten???
  120. 4.9 litre plug wire access problem.
  121. Engine mount - Any unique replacements?
  122. 4.9 Squeaking at Idle
  123. The continuing saga of my tranny problems...please help!
  124. 86 Fleetwood engine swap
  125. What senses the RPM on HT4100 engines?
  126. Open Throttle Switch Signal E27
  127. 83 FWB Idle Problems
  128. Got a code do not know what or where to check
  129. weird SES and hard start problem
  130. Sputtering, loss of power when hot
  131. Your opinion of the 4.5L V8 in the 88 DeVille
  132. oil
  133. Tranny Slipping?
  134. part identification 4.9
  135. 1992 seville 4.9 fuel filter location
  136. Good old 83' Coupe Deville
  137. new cadillac seville owner coolant flush
  138. 1993 Deville power steering pump failure
  139. ECM software
  140. 130 mph in a 4.9!
  141. Frozen Pulley
  142. Ignition Module issue
  143. Removing EGR valve - 4100
  144. Bad alternator in 93 Deville, need help
  145. Restore Lubricants
  146. Bad Head Gasket 92 DeVille 4.9- Need opinion
  147. Throttle Position Sensor Misadjusted
  148. A.I.R. Pump 4.5l '89 Deville
  149. temp sensor
  150. Don't ask oil questions on this site.
  151. 1985 deville died
  152. where do i go from here
  153. Need Help On Two More Things
  154. serious help needed
  155. 1983 Caddy transmission
  156. Strange Timing Issues
  157. Mobil 1 10W30
  158. 1985 Deville with a 4100 and it will not crank
  159. 1985 Deville with a 4100 and it will not crank
  160. Code E48 diagnosis
  161. codes ???please help
  162. 4.5 Allante intake on 93 4.9 deville
  163. New Trouble Code
  164. 1989 Caddy Deville......
  165. Throttle Body Plate issue
  166. Code and Coolant Prob.
  167. Low oil pressure!
  168. Oil Cooler Lines Leaking
  169. 1989 Caddy Deville......help!!!
  170. Stallling at idle
  171. gas pedal
  172. 4.5 TBI rough idle
  173. 94 Deville has almost no power from start
  174. 84 eldo conv't - 70 weight oil - yes or no?
  175. E012,E053 Won't run
  176. 1990 Seville Timing chain?
  177. 4.9 groaning
  178. '84 Eldo Code 44
  179. HT-4500 Starting trouble
  180. Speedometer Sensor issue ?
  181. The Ultimate FWD Cadillac Engine Swap
  182. Sticky Gas Pedal...4.5L
  183. Underhood smoking... need help with a diagnosis
  184. Fixed EGR now MPG is lower
  185. engin and trany swap for an 85 coupe deville
  186. Favorite things about the 4.9?
  187. 86 EGR Valve
  188. 4.5 TBI smoking
  189. Fuel pump on 4.9 92 Deville
  190. Fleetwood/DeVille Speedometer
  191. 4.1 Knock?? Or Tap??
  192. 1990 deville 4.5 air pump noisy
  193. 4.5L TBI Grumbling
  194. HT4500 and 4900 series Performance
  195. 4.1L injector
  196. how to get more hp from a 4100
  197. Intermittent Lurch—91 DeVille 4.9
  198. MAP Problems
  199. Oil Level
  200. How to start when very cold (less than 0 F)
  201. Need Help Please
  202. Engine surges at slow speed
  203. Stop Engine, Low Oil Pressure
  204. 1988 Fleetwood 4.5 Distributor order
  205. 1985 Seville Power Steering Pulley bolt
  206. Installing oil pump in 4.9 engine.
  207. 1985 deville ht4100 jump start
  208. GM Top End Cleaner Has Been Discontinued
  209. Makes Me Happy!
  210. HT4100 Question
  211. HT 4100 knock, 83 Eldorado (I know, another thread on this)
  212. Makes me nervous!
  213. 4.9 E55 code. TPS?
  214. Thoughts on the 4.5
  215. power steering leakk
  216. The SEA FOAM experience thread.
  217. Oh just great, a collapsed lifter in #1 cylinder!!
  218. 94 4.9 bypass siezed A/C compressor
  219. 85 Deville Still Has Poor Performance
  220. Need exhaust manifolds 4.1 HT4100
  221. 93 Deville stalls after car warms up
  222. New Caddy Owner, Need Some Help
  223. Rattle Under Car
  224. What kind of ISC motor should i get?
  225. 84 eldorado fuse panel pictures?
  226. Crack in my Block
  227. 93 DeVille AC converter clutch bypass ???
  228. Cooling System - Water Pump Conditioner/Anti-Rust
  229. Stock Exhaust dimensions on 93 Devilles
  230. Campaign 95-C-72 (recall)
  231. fuel pressure????
  232. Just finished my 4.9 Water pump repair pics inside
  233. 4.9L Rear Oil Leak
  234. Quick question: Ignition Control Module
  235. Disaster
  236. EGR Valve
  237. 4.1 main bearing thump
  238. Tranny problems, E39!! Please help, dont want to rebuild...
  239. 95 Deville 4.9 need help
  240. OMG water pump problem!
  241. Bypass Catalytic Converter on 1993 Deville?
  242. Starter motor gone on 87 deville 4.1
  243. Need help 4.9 L Fuel Delivery problem
  244. 92 4.9 DeVille runs horrible, sets codes
  245. Roller Lifters On The 4.9?
  246. water pump change on 4.1ltr
  247. 93 deville
  248. 1993 Cadillac Seville: Please Help starting problem
  249. Bad coil?
  250. Rebuilding a tbi on 89 deville