: HT4100 4.1, 4.5, 4.9



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  1. exhaust leak
  2. Changing Thermostat on 88 Coupe Deville
  3. HT4100 flooding out badly. Code 15,20,52 ?
  4. GM Top Engine Cleaner
  5. Coolant temp gets up around 230 some times
  6. Toasted fuel pump?
  7. What is that tube for?
  8. Finally bought some things for the car !
  9. 4.9L What the Hell is this? ...
  10. Is this converter alright?
  11. Professional injector cleaning?
  12. Is my fuel pressure low???? 93 Deville
  13. E62 Cruise control vacum solenoid error code
  14. I am going to make a cut out
  15. Problem adding a cutout to '90 Seville exhaust system,
  16. Flawed logic or a..
  17. transmission bolt up from 4.5L to 4.1L HT4100
  18. Does Anyone Have A Step By Step Guide To Adjusting The Tps?
  19. All Show And No Go
  20. Coolant issues must be contagious
  21. Coolant gushed out on highway, engine rattles
  22. Yet another exhaust theory question.
  23. 4.5 sounds real good with no cat
  24. Oil Pan Drain Plug Spins
  25. 87 Seville...Engine problems, knocking, overheating,do I shoot it?
  26. Can I use a regular fuel filter?
  27. Where is the fuel filter?
  28. RWD tranny for 4.9L??
  29. please help!!!!!!!
  30. Did I go overboard?
  31. Fuel: Maladies, Mayhem...Mileage!
  32. Errr... Map/Baro code. No clue what to do.
  33. Can a CS144 generator on a 4.9L be opened?
  34. Newbie here with a stall problem!
  35. The tricky TV cable...
  36. Now its knocking and oil light is on!!!
  37. Uh oh! I think my waterpump finally went!
  38. Accursed Ignition Timing...
  39. Whats makes one of your throtte blades wires Loose on one of the throttle blades
  40. How to gut a cat?
  41. Cooling Fans
  42. 90 Seville.. obd codes beginning with R??
  43. Sometimes she idles at 600-625... sometimes 900
  44. Oxygen sensor cured startup WOT
  45. Transmission rough downshifting to 1st
  46. Power Steering Leak...
  47. Tranny problem on an 89 eldo!
  48. If you need scans of service manual.. 1990 Cadillac
  49. This poor ol' car has been so abused.
  50. ****!!!! Flat Cam Now!!!!!!
  51. E53 - Distributor Signal Interrupt
  52. help
  53. HT-4100 modified for flex-fuel?
  54. 94 problem
  55. 4100 Engine Modified for Flex-Fuel?
  56. How important is the PCV?
  57. Replace the alternator or don't do it?
  58. 82 Hearse Hard Starting Cold - Codes
  59. Slight tick at idle, '92 Sedan deVille.
  60. Coolant Hell (and *gulp* headgasket?)
  61. Inconsistent loud bang from under hood
  62. mmmm Swisschesse.......ed the airbox :).
  63. Info on fuel injectors
  64. God No!!!!!!
  65. Reduced EGR flow - Detonation
  66. Fuel Pressure Inquiries
  67. My 4100 will not go past 50mph
  68. How come my motor goes full throttle on startup?
  69. Why are 4.x lifters noisy?
  70. 4.5 TBI vs 4.1 TBI
  71. power steering pump
  72. 93 Deville Loss of Power getting 6-7 MPG !!!
  73. Need Help Bad!
  74. 4.9 Exhaust
  75. 83 Eldorado swapping 4100 motors
  76. Wikipedia contradicted what I thought I knew
  77. I bought another HT4100 - a hearse
  78. Striped 4.9 Head Bolts Please Help
  79. Quick alternator question
  80. Please help! #1 service main part#?? 4.9 3545718 no good according to Cadillac?
  81. changing the distributer cap and rotor on a 91 deville 4.9
  82. Kill Switch - 1990 Cadillac DeVille
  83. Advice! My idle has gone nuts!
  84. SeaFoam Method
  85. Need Throttle Body Help!
  86. Shorted Mat sensor signal, E37.
  87. rhoads lifters?
  88. Say I buy a new 4.5 and transmission.. give me a rundown of wht it takes to put it in
  89. YES!!! It RUNS!!!!!
  90. Plugs and wires..
  91. Shadetree hall of shame.. I did something STUPID
  92. 4.9 Cracked Block Leaking Coolant
  93. How bad is this on the transmission...
  94. Rattling...
  95. Questions about replacing 4.5 motor/tranny
  96. 4.9 is running niiiiiiiiice.....
  97. Questions on ISC
  98. 4100 Timing Advance question.
  99. what causes an e55?
  100. 92 deville 4.9 timing cover question
  101. Why Does ?
  102. Fuel Injector Selection
  103. No overdrive
  104. Wobbly pulley
  105. 4.1 spark plug ????
  106. How much does 4.1 engine weigh??
  107. 1990 Cadillac Sedan DeVille
  108. Here is a video of the 86 fleetwood.
  109. Who's 4100 sounds like this?
  110. What is the BEST MOTOR FLUSH out there?
  111. Collapsed lifter!
  112. MAT sensor?
  113. Engine cradle bolts?
  114. Cam shaft test?...
  115. Can't get these bolts off...
  116. GM top end cleaner or seafoam..
  117. I broke my motor
  118. What causes a f48 code?
  119. Need to know ?
  120. GM Too Expensive Cleaner...
  121. oil problem
  122. I Am A Retard
  123. Engine Miss, (electronic not mechanical)
  124. Help with Plug Wires and a few other items on 4.9L 93 SDV
  125. 1985 4.1 Help
  126. 93' 4.9 Eldorado Heating
  127. Factory 4.x alternator
  128. Back firing/stalling/knocking HT-4100
  129. 88 deville tech question?
  130. Engine Upgrade?
  131. Little help with throttle issue...
  132. Custom Exhaust Manifolds and down pipe... for the 4.9
  133. 4.9 or 4.6
  134. FWD 86 Fleetwood For Sale.
  135. whats the diffrence?
  136. Help with cold stalling problem
  137. Misfire and absent fuel
  138. Timing 4.1L How to loosen dist???
  139. Tranny fluid frustration
  140. rough idle and bad miss
  141. Engine paranoia
  142. What are the pro's and con's of upgradeing your ignition system on a 4.9?
  143. remove fuel rail to change fpr on 4.9
  144. EGR Valve Location
  145. A question of exhaust theory...
  146. ecm data
  147. Fuel Injector Ripoff...
  148. Diagnostic code ?/EGR Valve
  149. '85 Deville, HT4100, considerable problems running properly...seeking help
  150. Looking For More Power From My 4.1
  151. Serpentine Belt Diagram 4100
  152. OBDI vs OBDII; AC compressor
  153. idle problem
  154. 4.9 distributor bushing wear
  155. What should I do to fix my bad gas mialage (really bad)
  156. Does the fpr have to leak to be bad?
  157. What is this sensor on the back of my 4.9 motor?
  158. Need help on alighning PRNDL switch.
  159. P/N for gaskets
  160. 88 Eldorado wont start
  161. prndl code
  162. E046 message
  163. PCV pipe???
  164. 10 mpg city and its not even like a city.Can it be my fpr.
  165. car throwing codes, decypher them please :D
  166. Fuel Pressure 92 Deville
  167. performance ??? ht4100
  168. ht4100 ?????
  169. Breather on 4T60E, is there and if so where is it?
  170. 1990 deville low reading
  171. 1990 deville vacuum
  172. Throttle body gasket?
  173. 90 Deville ignition wire, cap, rotor
  174. 91 deville stumbles after warming up
  175. 83 cadillac 4.1
  176. Timing Chain
  177. Discussion about caddeville's project (split from 4.9 into 88 Eldorado)
  178. Why Wont It Start?!!!
  179. 4.9 into 88 eldorado
  180. 83'Eldorado 2 camshafts later and it wont start
  181. Northern Indiana Users?
  182. engine ping,
  183. Speed limiter...
  184. Octane and fuel prices vs performance
  185. Any fresh tips for re-manufactured 4100 seeker?
  186. 4.5 wont start after head gaskets
  187. Advancing timing, need help...
  188. Whistling Sound
  189. Comparing Dexcool and green stuff
  190. My Fuel Injectors :(
  191. Sonofabitch !!!!!!
  192. 4100 emmissions air pump
  193. 1990 deville help
  194. Power improvement... from a carburator?
  195. Sad Caddy's in the background.
  196. Water Pump for 89 DeVille
  197. Heatsoak and Starters. Is this a Caddy problem too or just Cadero's.
  198. ISC motor problem? '94 Deville
  199. 88 DeVille Serpentine Belt
  200. Noise in Transmission?
  201. Coolant Leak - How to find?
  202. Good care (ATF) for 4T60E
  203. 1994 Deville 4.9 fuel pressure
  204. Please help an old man. (Backfiring voodoo fleetwood)
  205. Please Help! 4.9 won't shift out of second gear.
  206. Tranny problems engaging
  207. 89 deville 4.5 tranny in 93 seville 4.9 will it work?
  208. Need help asap.I have a draeded p093, is my trans gone?
  209. Some people just don't want to listen
  210. 92 Deville Rough Idle Periodic Stallin
  211. (3 4.9 bad mpg.Can low ac refrigerint cause this?
  212. Need a good write up for cleaning Tb and EGR valve please (4.9)
  213. WOT with a high mileage 4.9?
  214. Is my transmission fluid ok or do I need to change it out?
  215. 4T60E transmission problem??
  216. Messed up my transmission
  217. Simple question, what does the HT stand for
  218. Emmissions Testing and the 4.9 and BC Canada guys in here
  219. Knocking
  220. Knock sensor on HT4100?
  221. Cold air zapping coil!
  222. Error code 29
  223. Replaced everything...stumble is worse.
  224. 1984 Eldo 4.1 Engine Color Needed
  225. frontend noise
  226. Fastchip - Does it work?
  227. Does everyone have mandrel-bent piping?
  228. What is the Factory Timing for a 93 Eldorado
  229. I want a DIC (get your mind out of the gutter) :D
  230. 4.9 in Brougham??
  231. engine change
  232. Ram Air/Cold air intake for 4.9?
  233. Underdrive pulleys?
  234. Braking Engine Jump... 1990 DeVille
  235. engine miss 4.5 ???
  236. '90 DeVille ISC motor problem SOLVED
  237. 94 Deville misses backfires & DIES! whats wrong
  238. Fuel injector problem?
  239. Can't get my 4.9 to Adjust timing
  240. Valve Lash Adjustment
  241. 95 4.9 flywheel breakage?
  242. Fuel Pump Relay
  243. Not getting enough spark
  244. Not again!!
  245. Oxygen Sensor
  246. 4.9L Fuel Economy
  247. HT 4100 - Success stories
  248. Gurgling Sound In Engine?
  249. Second generation HT4100
  250. 1984 Fleetwood Code 52 ECM memory reset problem