: HT4100 4.1, 4.5, 4.9



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