: HT4100 4.1, 4.5, 4.9



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