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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. 87 Seville...Engine problems, knocking, overheating,do I shoot it?
  2. Can I use a regular fuel filter?
  3. Where is the fuel filter?
  4. RWD tranny for 4.9L??
  5. please help!!!!!!!
  6. Did I go overboard?
  7. Fuel: Maladies, Mayhem...Mileage!
  8. Errr... Map/Baro code. No clue what to do.
  9. Can a CS144 generator on a 4.9L be opened?
  10. Newbie here with a stall problem!
  11. The tricky TV cable...
  12. Now its knocking and oil light is on!!!
  13. Uh oh! I think my waterpump finally went!
  14. Accursed Ignition Timing...
  15. Whats makes one of your throtte blades wires Loose on one of the throttle blades
  16. How to gut a cat?
  17. Cooling Fans
  18. 90 Seville.. obd codes beginning with R??
  19. Sometimes she idles at 600-625... sometimes 900
  20. Oxygen sensor cured startup WOT
  21. Transmission rough downshifting to 1st
  22. Power Steering Leak...
  23. Tranny problem on an 89 eldo!
  24. If you need scans of service manual.. 1990 Cadillac
  25. This poor ol' car has been so abused.
  26. ****!!!! Flat Cam Now!!!!!!
  27. E53 - Distributor Signal Interrupt
  28. help
  29. HT-4100 modified for flex-fuel?
  30. 94 problem
  31. 4100 Engine Modified for Flex-Fuel?
  32. How important is the PCV?
  33. Replace the alternator or don't do it?
  34. 82 Hearse Hard Starting Cold - Codes
  35. Slight tick at idle, '92 Sedan deVille.
  36. Coolant Hell (and *gulp* headgasket?)
  37. Inconsistent loud bang from under hood
  38. mmmm Swisschesse.......ed the airbox :).
  39. Info on fuel injectors
  40. God No!!!!!!
  41. Reduced EGR flow - Detonation
  42. Fuel Pressure Inquiries
  43. My 4100 will not go past 50mph
  44. How come my motor goes full throttle on startup?
  45. Why are 4.x lifters noisy?
  46. 4.5 TBI vs 4.1 TBI
  47. power steering pump
  48. 93 Deville Loss of Power getting 6-7 MPG !!!
  49. Need Help Bad!
  50. 4.9 Exhaust
  51. 83 Eldorado swapping 4100 motors
  52. Wikipedia contradicted what I thought I knew
  53. I bought another HT4100 - a hearse
  54. Striped 4.9 Head Bolts Please Help
  55. Quick alternator question
  56. Please help! #1 service main part#?? 4.9 3545718 no good according to Cadillac?
  57. changing the distributer cap and rotor on a 91 deville 4.9
  58. Kill Switch - 1990 Cadillac DeVille
  59. Advice! My idle has gone nuts!
  60. SeaFoam Method
  61. Need Throttle Body Help!
  62. Shorted Mat sensor signal, E37.
  63. rhoads lifters?
  64. Say I buy a new 4.5 and transmission.. give me a rundown of wht it takes to put it in
  65. YES!!! It RUNS!!!!!
  66. Plugs and wires..
  67. Shadetree hall of shame.. I did something STUPID
  68. 4.9 Cracked Block Leaking Coolant
  69. How bad is this on the transmission...
  70. Rattling...
  71. Questions about replacing 4.5 motor/tranny
  72. 4.9 is running niiiiiiiiice.....
  73. Questions on ISC
  74. 4100 Timing Advance question.
  75. what causes an e55?
  76. 92 deville 4.9 timing cover question
  77. Why Does ?
  78. Fuel Injector Selection
  79. No overdrive
  80. Wobbly pulley
  81. 4.1 spark plug ????
  82. How much does 4.1 engine weigh??
  83. 1990 Cadillac Sedan DeVille
  84. Here is a video of the 86 fleetwood.
  85. Who's 4100 sounds like this?
  86. What is the BEST MOTOR FLUSH out there?
  87. Collapsed lifter!
  88. MAT sensor?
  89. Engine cradle bolts?
  90. Cam shaft test?...
  91. Can't get these bolts off...
  92. GM top end cleaner or seafoam..
  93. I broke my motor
  94. What causes a f48 code?
  95. Need to know ?
  96. GM Too Expensive Cleaner...
  97. oil problem
  98. I Am A Retard
  99. Engine Miss, (electronic not mechanical)
  100. Help with Plug Wires and a few other items on 4.9L 93 SDV
  101. 1985 4.1 Help
  102. 93' 4.9 Eldorado Heating
  103. Factory 4.x alternator
  104. Back firing/stalling/knocking HT-4100
  105. 88 deville tech question?
  106. Engine Upgrade?
  107. Little help with throttle issue...
  108. Custom Exhaust Manifolds and down pipe... for the 4.9
  109. 4.9 or 4.6
  110. FWD 86 Fleetwood For Sale.
  111. whats the diffrence?
  112. Help with cold stalling problem
  113. Misfire and absent fuel
  114. Timing 4.1L How to loosen dist???
  115. Tranny fluid frustration
  116. rough idle and bad miss
  117. Engine paranoia
  118. What are the pro's and con's of upgradeing your ignition system on a 4.9?
  119. remove fuel rail to change fpr on 4.9
  120. EGR Valve Location
  121. A question of exhaust theory...
  122. ecm data
  123. Fuel Injector Ripoff...
  124. Diagnostic code ?/EGR Valve
  125. '85 Deville, HT4100, considerable problems running properly...seeking help
  126. Looking For More Power From My 4.1
  127. Serpentine Belt Diagram 4100
  128. OBDI vs OBDII; AC compressor
  129. idle problem
  130. 4.9 distributor bushing wear
  131. What should I do to fix my bad gas mialage (really bad)
  132. Does the fpr have to leak to be bad?
  133. What is this sensor on the back of my 4.9 motor?
  134. Need help on alighning PRNDL switch.
  135. P/N for gaskets
  136. 88 Eldorado wont start
  137. prndl code
  138. E046 message
  139. PCV pipe???
  140. 10 mpg city and its not even like a city.Can it be my fpr.
  141. car throwing codes, decypher them please :D
  142. Fuel Pressure 92 Deville
  143. performance ??? ht4100
  144. ht4100 ?????
  145. Breather on 4T60E, is there and if so where is it?
  146. 1990 deville low reading
  147. 1990 deville vacuum
  148. Throttle body gasket?
  149. 90 Deville ignition wire, cap, rotor
  150. 91 deville stumbles after warming up
  151. 83 cadillac 4.1
  152. Timing Chain
  153. Discussion about caddeville's project (split from 4.9 into 88 Eldorado)
  154. Why Wont It Start?!!!
  155. 4.9 into 88 eldorado
  156. 83'Eldorado 2 camshafts later and it wont start
  157. Northern Indiana Users?
  158. engine ping,
  159. Speed limiter...
  160. Octane and fuel prices vs performance
  161. Any fresh tips for re-manufactured 4100 seeker?
  162. 4.5 wont start after head gaskets
  163. Advancing timing, need help...
  164. Whistling Sound
  165. Comparing Dexcool and green stuff
  166. My Fuel Injectors :(
  167. Sonofabitch !!!!!!
  168. 4100 emmissions air pump
  169. 1990 deville help
  170. Power improvement... from a carburator?
  171. Sad Caddy's in the background.
  172. Water Pump for 89 DeVille
  173. Heatsoak and Starters. Is this a Caddy problem too or just Cadero's.
  174. ISC motor problem? '94 Deville
  175. 88 DeVille Serpentine Belt
  176. Noise in Transmission?
  177. Coolant Leak - How to find?
  178. Good care (ATF) for 4T60E
  179. 1994 Deville 4.9 fuel pressure
  180. Please help an old man. (Backfiring voodoo fleetwood)
  181. Please Help! 4.9 won't shift out of second gear.
  182. Tranny problems engaging
  183. 89 deville 4.5 tranny in 93 seville 4.9 will it work?
  184. Need help asap.I have a draeded p093, is my trans gone?
  185. Some people just don't want to listen
  186. 92 Deville Rough Idle Periodic Stallin
  187. (3 4.9 bad mpg.Can low ac refrigerint cause this?
  188. Need a good write up for cleaning Tb and EGR valve please (4.9)
  189. WOT with a high mileage 4.9?
  190. Is my transmission fluid ok or do I need to change it out?
  191. 4T60E transmission problem??
  192. Messed up my transmission
  193. Simple question, what does the HT stand for
  194. Emmissions Testing and the 4.9 and BC Canada guys in here
  195. Knocking
  196. Knock sensor on HT4100?
  197. Cold air zapping coil!
  198. Error code 29
  199. Replaced everything...stumble is worse.
  200. 1984 Eldo 4.1 Engine Color Needed
  201. frontend noise
  202. Fastchip - Does it work?
  203. Does everyone have mandrel-bent piping?
  204. What is the Factory Timing for a 93 Eldorado
  205. I want a DIC (get your mind out of the gutter) :D
  206. 4.9 in Brougham??
  207. engine change
  208. Ram Air/Cold air intake for 4.9?
  209. Underdrive pulleys?
  210. Braking Engine Jump... 1990 DeVille
  211. engine miss 4.5 ???
  212. '90 DeVille ISC motor problem SOLVED
  213. 94 Deville misses backfires & DIES! whats wrong
  214. Fuel injector problem?
  215. Can't get my 4.9 to Adjust timing
  216. Valve Lash Adjustment
  217. 95 4.9 flywheel breakage?
  218. Fuel Pump Relay
  219. Not getting enough spark
  220. Not again!!
  221. Oxygen Sensor
  222. 4.9L Fuel Economy
  223. HT 4100 - Success stories
  224. Gurgling Sound In Engine?
  225. Second generation HT4100
  226. 1984 Fleetwood Code 52 ECM memory reset problem
  227. 84 Eldorado No Start
  228. engine rev's and dies
  229. Engine revs when I turn the wheel????????
  230. throddle control
  231. something happened today with the 90 deville and i don't know what
  232. unique problem 4.9
  233. Stoneys Main Bearing Diary
  234. nees help fast please
  235. 4.9 timing is hard! Idles rough, stumble on acceleration
  236. Water Pump Leakage!!!
  237. Min air ????
  238. Help with a water pump installation!!
  239. How to replace water pump on 92 seville?
  240. Another TPS ?????
  241. 87 Deville 4.1- No fuel!!!!!
  242. horsepower for 4.9
  243. A question for the gurus
  244. Trans cooler leak!
  245. 1990 Cadillac Sedan Deville high idle
  246. new oils verses old oils
  247. Minimum IDLE SCREW adjustment
  248. Oil cooler line o-ring
  249. Is my ISC motor shot? ('90 4.5L)
  250. Help with identifying a GM Goodwrench replacement block.