: HT4100 4.1, 4.5, 4.9



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