: HT4100 4.1, 4.5, 4.9



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