: HT4100 4.1, 4.5, 4.9



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