: HT4100 4.1, 4.5, 4.9



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  1. Curious Fuel Pump Behavior
  2. Cooling fan fault
  3. High Idle. ISC? Need Advice!!!!
  4. 92 STS Engine Trouble
  5. head gasket, intake gasket or what?
  6. Engine RPM.... is this normal?
  7. 91 Eldorado No Crank B334 code system problem
  8. E67!!!!!! how do i fix
  9. Video of my 4.9 5spd in Action.
  10. broke water pump on my 88!
  11. In search of a new/rebuilt vacuum pump...
  12. Help with the codes please!!
  13. Digital Fuel Injection vs Crossfire Injection
  14. Im Having Problems With My 86 Cadillac
  15. Rust in my cooling system, PLEASE HELP!
  16. 3/8"-ish metal line off of throttle body runs where... ..?
  17. 1990 sedan deville isc crap =(
  18. 5 liter fuel injectors in a 4.9 project!
  19. Cylinder Pressure Test Question???????
  20. Trans Problem?
  21. I need a quick answer
  22. ISC Motor question
  23. Question on use of Rotella 15W-40
  24. 82 HT4100 Hearse Fuel System Codes
  25. Is my EGR valave toast?
  26. just died
  27. Newbie 4100 owner advice
  28. Cleaning under hood - recommendations?
  29. It WON'T slow down...
  30. Spark plugs and spark knock
  31. Where is the control valve assembly for the transmission??
  32. Does the ISC motor affect the tranny shifting/downshifting???
  33. Ethanol in your Caddy....?!
  34. Any Ideas? 93 Deville Stalling
  35. Camshaft position sensor
  36. What's wrong with the tranny?
  37. 1990 Sedan Deville - Any Help is Appreciated
  38. Changing Water Pump on 95 Deville
  39. engine ping
  40. hesitation,back fire and bad Idle 4.9
  41. 4.9 performance exhaust
  42. Any Neat Tricks Replacing Lh Head Gasket???
  43. real cold air intake(no short ram)4.9
  44. Throttle Body 1984 HT4100
  45. 4.9 exploding mufflers
  46. Northstar engine builders in So Cal?
  47. A/C Compressor Only Works at High RPM?
  48. How often do you have to calibrate your TPS?
  49. Its not the fuel pump.
  50. Swapping 4.9 to 4.6N*
  51. 4100 coolant loss #3 cylinder
  52. will 4.5L heads bolt up to a 4.1L
  53. Engine Miss...driving me mad...
  54. Compression ratios?
  55. They see me coming OR So they think
  56. They see me coming OR So they think
  57. exhaust leak
  58. Changing Thermostat on 88 Coupe Deville
  59. HT4100 flooding out badly. Code 15,20,52 ?
  60. GM Top Engine Cleaner
  61. Coolant temp gets up around 230 some times
  62. Toasted fuel pump?
  63. What is that tube for?
  64. Finally bought some things for the car !
  65. 4.9L What the Hell is this? ...
  66. Is this converter alright?
  67. Professional injector cleaning?
  68. Is my fuel pressure low???? 93 Deville
  69. E62 Cruise control vacum solenoid error code
  70. I am going to make a cut out
  71. Problem adding a cutout to '90 Seville exhaust system,
  72. Flawed logic or a..
  73. transmission bolt up from 4.5L to 4.1L HT4100
  74. Does Anyone Have A Step By Step Guide To Adjusting The Tps?
  75. All Show And No Go
  76. Coolant issues must be contagious
  77. Coolant gushed out on highway, engine rattles
  78. Yet another exhaust theory question.
  79. 4.5 sounds real good with no cat
  80. Oil Pan Drain Plug Spins
  81. 87 Seville...Engine problems, knocking, overheating,do I shoot it?
  82. Can I use a regular fuel filter?
  83. Where is the fuel filter?
  84. RWD tranny for 4.9L??
  85. please help!!!!!!!
  86. Did I go overboard?
  87. Fuel: Maladies, Mayhem...Mileage!
  88. Errr... Map/Baro code. No clue what to do.
  89. Can a CS144 generator on a 4.9L be opened?
  90. Newbie here with a stall problem!
  91. The tricky TV cable...
  92. Now its knocking and oil light is on!!!
  93. Uh oh! I think my waterpump finally went!
  94. Accursed Ignition Timing...
  95. Whats makes one of your throtte blades wires Loose on one of the throttle blades
  96. How to gut a cat?
  97. Cooling Fans
  98. 90 Seville.. obd codes beginning with R??
  99. Sometimes she idles at 600-625... sometimes 900
  100. Oxygen sensor cured startup WOT
  101. Transmission rough downshifting to 1st
  102. Power Steering Leak...
  103. Tranny problem on an 89 eldo!
  104. If you need scans of service manual.. 1990 Cadillac
  105. This poor ol' car has been so abused.
  106. ****!!!! Flat Cam Now!!!!!!
  107. E53 - Distributor Signal Interrupt
  108. help
  109. HT-4100 modified for flex-fuel?
  110. 94 problem
  111. 4100 Engine Modified for Flex-Fuel?
  112. How important is the PCV?
  113. Replace the alternator or don't do it?
  114. 82 Hearse Hard Starting Cold - Codes
  115. Slight tick at idle, '92 Sedan deVille.
  116. Coolant Hell (and *gulp* headgasket?)
  117. Inconsistent loud bang from under hood
  118. mmmm Swisschesse.......ed the airbox :).
  119. Info on fuel injectors
  120. God No!!!!!!
  121. Reduced EGR flow - Detonation
  122. Fuel Pressure Inquiries
  123. My 4100 will not go past 50mph
  124. How come my motor goes full throttle on startup?
  125. Why are 4.x lifters noisy?
  126. 4.5 TBI vs 4.1 TBI
  127. power steering pump
  128. 93 Deville Loss of Power getting 6-7 MPG !!!
  129. Need Help Bad!
  130. 4.9 Exhaust
  131. 83 Eldorado swapping 4100 motors
  132. Wikipedia contradicted what I thought I knew
  133. I bought another HT4100 - a hearse
  134. Striped 4.9 Head Bolts Please Help
  135. Quick alternator question
  136. Please help! #1 service main part#?? 4.9 3545718 no good according to Cadillac?
  137. changing the distributer cap and rotor on a 91 deville 4.9
  138. Kill Switch - 1990 Cadillac DeVille
  139. Advice! My idle has gone nuts!
  140. SeaFoam Method
  141. Need Throttle Body Help!
  142. Shorted Mat sensor signal, E37.
  143. rhoads lifters?
  144. Say I buy a new 4.5 and transmission.. give me a rundown of wht it takes to put it in
  145. YES!!! It RUNS!!!!!
  146. Plugs and wires..
  147. Shadetree hall of shame.. I did something STUPID
  148. 4.9 Cracked Block Leaking Coolant
  149. How bad is this on the transmission...
  150. Rattling...
  151. Questions about replacing 4.5 motor/tranny
  152. 4.9 is running niiiiiiiiice.....
  153. Questions on ISC
  154. 4100 Timing Advance question.
  155. what causes an e55?
  156. 92 deville 4.9 timing cover question
  157. Why Does ?
  158. Fuel Injector Selection
  159. No overdrive
  160. Wobbly pulley
  161. 4.1 spark plug ????
  162. How much does 4.1 engine weigh??
  163. 1990 Cadillac Sedan DeVille
  164. Here is a video of the 86 fleetwood.
  165. Who's 4100 sounds like this?
  166. What is the BEST MOTOR FLUSH out there?
  167. Collapsed lifter!
  168. MAT sensor?
  169. Engine cradle bolts?
  170. Cam shaft test?...
  171. Can't get these bolts off...
  172. GM top end cleaner or seafoam..
  173. I broke my motor
  174. What causes a f48 code?
  175. Need to know ?
  176. GM Too Expensive Cleaner...
  177. oil problem
  178. I Am A Retard
  179. Engine Miss, (electronic not mechanical)
  180. Help with Plug Wires and a few other items on 4.9L 93 SDV
  181. 1985 4.1 Help
  182. 93' 4.9 Eldorado Heating
  183. Factory 4.x alternator
  184. Back firing/stalling/knocking HT-4100
  185. 88 deville tech question?
  186. Engine Upgrade?
  187. Little help with throttle issue...
  188. Custom Exhaust Manifolds and down pipe... for the 4.9
  189. 4.9 or 4.6
  190. FWD 86 Fleetwood For Sale.
  191. whats the diffrence?
  192. Help with cold stalling problem
  193. Misfire and absent fuel
  194. Timing 4.1L How to loosen dist???
  195. Tranny fluid frustration
  196. rough idle and bad miss
  197. Engine paranoia
  198. What are the pro's and con's of upgradeing your ignition system on a 4.9?
  199. remove fuel rail to change fpr on 4.9
  200. EGR Valve Location
  201. A question of exhaust theory...
  202. ecm data
  203. Fuel Injector Ripoff...
  204. Diagnostic code ?/EGR Valve
  205. '85 Deville, HT4100, considerable problems running properly...seeking help
  206. Looking For More Power From My 4.1
  207. Serpentine Belt Diagram 4100
  208. OBDI vs OBDII; AC compressor
  209. idle problem
  210. 4.9 distributor bushing wear
  211. What should I do to fix my bad gas mialage (really bad)
  212. Does the fpr have to leak to be bad?
  213. What is this sensor on the back of my 4.9 motor?
  214. Need help on alighning PRNDL switch.
  215. P/N for gaskets
  216. 88 Eldorado wont start
  217. prndl code
  218. E046 message
  219. PCV pipe???
  220. 10 mpg city and its not even like a city.Can it be my fpr.
  221. car throwing codes, decypher them please :D
  222. Fuel Pressure 92 Deville
  223. performance ??? ht4100
  224. ht4100 ?????
  225. Breather on 4T60E, is there and if so where is it?
  226. 1990 deville low reading
  227. 1990 deville vacuum
  228. Throttle body gasket?
  229. 90 Deville ignition wire, cap, rotor
  230. 91 deville stumbles after warming up
  231. 83 cadillac 4.1
  232. Timing Chain
  233. Discussion about caddeville's project (split from 4.9 into 88 Eldorado)
  234. Why Wont It Start?!!!
  235. 4.9 into 88 eldorado
  236. 83'Eldorado 2 camshafts later and it wont start
  237. Northern Indiana Users?
  238. engine ping,
  239. Speed limiter...
  240. Octane and fuel prices vs performance
  241. Any fresh tips for re-manufactured 4100 seeker?
  242. 4.5 wont start after head gaskets
  243. Advancing timing, need help...
  244. Whistling Sound
  245. Comparing Dexcool and green stuff
  246. My Fuel Injectors :(
  247. Sonofabitch !!!!!!
  248. 4100 emmissions air pump
  249. 1990 deville help
  250. Power improvement... from a carburator?