: HT4100 4.1, 4.5, 4.9



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