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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. Injector Trouble 4.9
  2. Crank pulley wont spin...
  3. She runs!
  4. 84 Seville - low speed hesitation
  5. How long will it last?
  6. 4.5 to 4.9
  7. 85 Seville 4.1 Knocking?
  8. poor gas milage
  9. Outside temp sensor location---4.9 litre.
  10. My Car is Fixed!!! New Camshaft and Lifters
  11. Water pumps...Generally speaking.
  12. NOISEY cold start ups with the pulleys, only to quiet down when warm.
  13. 93 deville 4.9 noisey cold pulleys, quiet when warm. whats going out?
  14. My speedometer is WAY off, and has problems in park
  15. 91 deville Starter enable relay
  16. gas issue
  17. '88 DeVille EXTREME ISC problems
  18. 92 STS - Stalls anywhere but the highway.
  19. 93 Eldawg Stalls while driving but drives great
  20. EGR System Question
  21. 1987 Cadillac Deville No Fuel Preasure Im lost
  22. ECM questions
  23. Bosch 19# Injectors
  24. I Lost First Gear, Car barely moves with throttle!
  25. 83 Deville Performance?
  26. would an oil stabilizer help with burning
  27. OBD1 Codes
  28. HT4100 Brand New
  29. Help! 1983 Seville with HT-4100 FWD, need ideas for a swap-out?
  30. 85 Fleetwood FWD Won't Start! Help!
  31. Any good 4.x mechanics in the Detroit area?
  32. Water Pump Removal
  33. 1985 4.1L Distibutor Drive Gear for oil pump
  34. 6.0L? say what?
  35. '91 4.9 swap into a rear drive application?
  36. 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start
  37. Possible Transmission Problem when shifting from park
  38. Water Pump - Snapped Bolt
  39. replacing camshaft bearings?
  40. 85 Deville 4.1L Oil problems.
  41. Won't Start After Driving
  42. need help concerning tune up
  43. should I replace the catalytic converter
  44. 1990 deville shifting problem
  45. TBI injectors
  46. Flat cam or bad lifter?
  47. Code E15???????
  48. flickering Service Soon and no codes...
  49. 4.1 Engine: Sensor Above #8 Spark Plug?
  50. how many mods do you all know about?
  51. high output alternator
  52. ISC RPM Out Of Range
  53. Non GM parts=sick Cadillac??
  54. 4.9 Deville Concours driving terrible again!
  55. Torque converter lock up solenoid, Where?
  56. Engine Swap
  57. 85 Eldo HT 4100 ISC/TPS
  58. 4.5 spark plugs
  59. 4100 engine temp??
  60. Weird 4.9l issues
  61. Finally Solved 4.1 Hesitation: Coil & Plug Wires
  62. Need help with 85 Eldo HT4100 Tuneup
  63. 91 Fleetwood injector impedence?
  64. How do I access the internal codes and what are the normal parameters for a '92 4.9?
  65. SERVICE SOON telltale light!!
  66. Cadillac 4.5L PFI and 4.9L PFI IAT?
  67. my 4100--what would you do
  68. Another BIG 4.x Engine Tip--Especially for 4.1 Owners
  69. what is that god awful smell
  70. '92 Deville 4.9 runs great at startup, runs like crap when hot
  71. e44 o2 error
  72. 4.1 Sputters and pops
  73. Tips on swapping HT4100 for 500
  74. Coolant Temp Light = Sensor?
  75. Need Tps Help
  76. 4.9l Starter Connection Problem
  77. 91 Deville 4.9l No Start Issue
  78. 4.9 stalling problem,and allante question
  79. Conflicting torque information
  80. Replaced Water Pump on 89 4.5 Still leaking
  81. 4100 seville engine swap help needed
  82. 4.1 to 4.9.... RWD?
  83. Blower motor not operating
  84. Any great 4.9 mods?
  85. Remanufactured HT4100 - 10K and now oil in radiator/leak
  86. HT4100 Running BAD when warm.
  87. EGR stack tubes?????
  88. HT4100 Backfires
  89. Checked your A.I.R. system filter lately?
  90. 1990 Deville PRNDL problem
  91. 1990 Deville running poorly.
  92. Thanks for the muffler info
  93. Fuel/exhaust smell seems too strong...dangerous?
  94. 4.9ltr Northstar performance?
  95. anyone know how to remove the crankshaft pully 1990 deville 4.5
  96. 1994 Deville Running Rough
  97. What does this code mean?
  98. Fuse Popping on AC Clutch
  99. 93 Seville 4.9 rough idle, slow response, P041 code
  100. 1985 Eldorado Engine Died! help!
  101. A 4.X Water Pump Story - Not for the Faint of Heart
  102. service vehicle soon is on my dash
  103. Intake gaskets leaking...common problem on the 4.9?
  104. newbie need help
  105. 4.9 Pinging
  106. Stumbling on the on ramps 4.9
  107. Advice/Help Please -- Goodyear Gave Up
  108. 4.9L idle issues... no power.. etc.. TPS?
  109. 4.9 Engine Oil Capacity - 92 Seville
  110. Eldorado Driveability
  111. New member planning mods to 90 STS
  112. 4.5L TBI whistling
  113. 4.9L 1991 Seville driving me crazy - won't start
  114. Fuel Data Center Answers
  115. PCV valve location on 4.9 litre.
  116. HT4100 Driveability Question/Problem
  117. Replacing water pump on '87 4100 - tips?
  118. Plug Wire Order-87 Ht4100
  119. intermittent miss and other weird happenings
  120. 4.5 Cooling System Woes...
  121. HT4100 SYSTEM PROBLEM E047 and B334
  122. Is lifter tick normal on a 4.9?
  123. Coolant and Supplement Change Intervals
  124. 4.1 v8 injector resistance
  125. OIL cooler lines leaking
  126. engine oil
  127. Need help
  128. Need a little help
  129. No Spark
  130. Normal??
  131. Coolant Questions
  132. Another tip for 4.x car owners
  133. Trans Fluid Capacity, '93 Deville, 4.9
  134. dumb question, anyone know where the pcv is on a 4.9?
  135. 4.9 hesitates on highway
  136. How many miles can you expect out of a 4.9 engine and transmission?
  137. 4.9 Exhaust Note
  138. 4.9 Will Not Idle Below 2500rpm!
  139. Engine miss.......AGAIN
  140. Ht4100 V8
  141. Need transmission advice, please!
  142. Not Sure What Engine I have
  143. Turbo Muffler on a 4.9
  144. Premium Fuel in the 4.9?
  145. Ht4100
  146. HT4100 v8 frd eldorado
  147. Alternator issues
  148. HT4100 Hesitation Advice
  149. A/C Recharge
  150. Anyone change a starter on a FWD 4100?
  151. ac problems
  152. 1991 Seville
  153. 1985 Eldorado thinks it a diesel?
  154. 4.9 Problems at Wide Open Throttle
  155. Eldorado and the 4.1 engine ... ????
  156. HT 4100: Avoid at all costs????? Help!
  157. Changed PCV Valve at 98k Miles
  158. Engine Noise
  159. Speed Limiter
  160. Starter/voltage problem...
  161. engine swaps - 4500, 4900, 4100 engines
  162. Service Engine Light
  163. tachometer [jumps] 4.9 Seville
  164. boost HP on a 4.9 in my 1992 seville
  165. 83 Coupe Deville hard code 33 problems
  166. 4.9 shudder when at idle
  167. Possible injector leaks?
  168. Out of no where, my 92 Eldo did not start today.
  169. HT4100 Engine 250V8
  170. Help with and '89 Deville w/4.5L
  171. Tune-up questions, spark plugs
  172. Mystery Grind in Transmission, Engine, Where?
  173. 85 Deville 4100 Driveability
  174. I dread turning this car off!
  175. 4.9 instead of 4.5??
  176. 88 cdv
  177. Should I buy a car with a 4.1 L Engine?
  178. Ok ive given up on this engine.
  179. Oil test shows coolant contamination in 4.9!
  180. Need 2 things please...
  181. honest mpg of 4.9 city driving survey
  182. transmission bump on downshift
  183. ISC motor 1993 Deville
  184. Think i messed something up
  185. A little help needed identifying a loose connector
  186. Intermittent ISC? TPS? Problem still
  187. 4.9 STILL runs rough sets codes
  188. TPS Question
  189. Maitenance Questions, 4.9L 1993 Deville
  190. loud rumble now when stopping now
  191. 4.1L Oil Cooler path through Radiator
  192. Can overheating a 4.9L once damage your headgaskets?
  193. 4.9L: original red/blue A/C valve caps?
  194. Better intake for the 4.1L
  195. Idle is too high now
  196. Slight fuel leak at TBI
  197. Check Vehicle Light
  198. Setting Timing on '84 HT4100 4.1L
  199. tuning Questions for a 93 deville
  200. gas leak from cannister (85 Eldorado)
  201. High startup idle?
  202. Car wont shift on its own but shifts manually
  203. Coolant Supplement?
  204. Calling all 4.5 PFI and 4.9 PFI Owners
  205. Think the engine/tranny would last?
  206. Rocker Arm Support Part Problem-HELP?
  207. Problems w/ 4.9
  208. HT4100 Misfire Question
  209. indexing spark plugs
  210. 4.5L L (front) Cracked Header
  211. Alternator Issues--Please Help!
  212. Another Isc Question?
  213. 4.1L.. What's the problem?
  214. Best way to bleed the cooling system?
  215. car runs too rich didnt pass smog
  216. ht4100 engine cleanup. how to?
  217. Why An Aluminum Block with Iron Heads?
  218. 1985 deville runs great but
  219. 85 Seville with 4.1 Engine: Buy or Run?
  220. Anyone change the valve cover gaskets?
  221. Horrendous gas mileage
  222. Failed smog test - high CO
  223. Looking f/a 4100 4.1?
  224. 85 Deville TV Cable Adjustment
  225. fuel injection??>??
  226. 4.9L seville/deville fastchips or superchips performance chip
  227. keeps going like the energizer bunny
  228. E055 OBD1 Code
  229. Air Filter Question
  230. Serevice engine soon
  231. 4.1/4100 Distributor Hold down- how to tighten???
  232. 4.9 litre plug wire access problem.
  233. Engine mount - Any unique replacements?
  234. 4.9 Squeaking at Idle
  235. The continuing saga of my tranny problems...please help!
  236. 86 Fleetwood engine swap
  237. What senses the RPM on HT4100 engines?
  238. Open Throttle Switch Signal E27
  239. 83 FWB Idle Problems
  240. Got a code do not know what or where to check
  241. weird SES and hard start problem
  242. Sputtering, loss of power when hot
  243. Your opinion of the 4.5L V8 in the 88 DeVille
  244. oil
  245. Tranny Slipping?
  246. part identification 4.9
  247. 1992 seville 4.9 fuel filter location
  248. Good old 83' Coupe Deville
  249. new cadillac seville owner coolant flush
  250. 1993 Deville power steering pump failure