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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. isc motor question
  2. HT 4100 Replacement Source?
  3. 4.5L Valve Pinging / Clattering
  4. problem while coasting
  5. Rough Idle, 87 4.1 Eldorado
  6. What water??
  7. throwing my belt off
  8. Which models come with the 4.9 V8?
  9. Rough running 92 Eldo
  10. 4100 D F I injector problems... looking for solutions
  11. 4.9 codes
  12. Best way to clean my throttle body?
  13. 85 Eldorado 4.1 help!!
  14. Engine Oil Questions - Bboby
  15. Finally. . .Solved Intake Backfire
  16. Whats The AVG MPG Readout for this forum
  17. Engine Idles 10 Seconds AFTER Ignition Shut-Off!!
  18. Weird 4.9 noise (not in archives)
  19. what kinda maintenance should i do
  20. Bbob...Whats the difference!?!
  21. Grounds Anyone?
  22. Ht4100 Backfires Out Of Fuel Injection
  23. Check Fuel Pump Amps draw ? Bob ?
  24. 90 Deville code help
  25. Starts hard when it gets hot
  26. Gas milage back, more power, more smooth..
  27. Rpm/idle Problems
  28. Oil Filter Capacity?
  29. Getting a Attitude Again-missing
  30. Is There a good quick fix for oil consumption?
  31. looking for opinions on best oil/synthetic to use in a 4.1
  32. I Don't Even Know Where To Start
  33. 93 Deville Experts Please e26 239 e47 e97 e98 f32 stalls
  34. Fastest 4.9 Ever?
  35. 93 Sedan 4.9 F32, archives no help
  36. Change spark PLugs
  37. good compression
  38. Where on the Web can I Find AC Delco Spark Plugs Cheap
  39. Changed Oil Pan Gasket, Still Leaking (4.1)
  40. Cam sensor replacement?
  41. Oil drain plug stuck on 4.5!
  42. i want to make sure
  43. Looking for used v-8 intake
  44. Fuel Economy and Engine Power
  45. 85 seville transmission
  46. Rotella coolant.
  47. Noise Under Hood When Turning Ignition On and Off
  48. Coolant Pellets? How Many?
  49. 1990 bcm code e-47
  50. please help
  51. 4-9 Fuel Pump Psi
  52. Engine Knock
  53. help my overheat um i think
  54. Is this the same knock as the 4.9 knock? It is an HT4100
  55. 4.9 valve cover
  56. Porting on HT4100's
  57. 4.5L Idle Problem Solved!! Thanks, bbobynski
  58. 84 deville died, won't restart ht4100
  59. surging power
  60. Air Management System Problem
  61. '85 Deville running rich
  62. 4.9 60k knock gone!!!!!!!!!!!!!!!!!
  63. Install Separate Thermostatic Fan Control?
  64. 4.1 Eldorado Oil Pan Gasket Change; MAJOR PAIN!
  65. Anyone Need a HT 4100
  66. questions on 4.9l v8
  67. '92 4.9 Stalling after transmission rebuild
  68. Fuel Injectors 94 Deville 4.9L
  69. 4.9L compatable with small block???
  70. 92 seville performance help
  71. Bbob- Open Loop Better Than Closed??
  72. 86 Seville 4.1 advice re removal of water pump
  73. GM parts vs Aftermarket- HT4100
  74. Where's the ALDL on my 88 Deville?
  75. Tranny Woes
  76. 4.9 with 60K knocking, please help!!!!!!!!!!!
  77. ISC Motor &TPS/E30 code
  78. To ILLUMINA!!! RE Performance Parts for 4.9
  79. Transmission
  80. Cleaned egr tubes
  81. 95 deville blown head gasket
  82. Question About Changing Water Pump
  83. Purchased 1984 Sedan Deville
  84. stock 4.9 intake to allante intake comparison
  85. What kind of problems do you get if you have a F32 code
  86. Amsoil for 4.9
  87. 93 weirdo miss
  88. Mixing oils...
  89. What Is A PCM?
  90. What is a BCM?
  91. Redline/Tachometer
  92. HT4100 "Base Timing Mode"
  93. A few 4.x questions
  94. 4.x dyno and comparison questions
  95. '90 Deville 4.5 idle problems
  96. 200R4 slipping real bad
  97. 88 Deville...E30 & EE30 code
  98. 4 prong spark plugs on 4.5
  99. Idle Speed Control Unit
  100. Does Anyone have F codes for a 93 deville
  101. thermostat
  102. Computer/wiring on 4.1L to 4.5L swap
  103. 1988 Deville Fast idle problems 4.5L
  104. 4.5--->4.9? (maybe more)
  105. HT4100 0-60 times!
  106. tranny slipping and e39 vcc
  107. Cheap HP´s?
  108. Help!!!My caddy flunked the emmissions test
  109. 92 Help!!!
  110. Left or Right Bank Fuel Imbalance
  111. Engine Misses when cold
  112. The "4.9 liter turbocharger, stage 1" thread.
  113. code19
  114. Code E30 ( NO DASH!!! )
  115. 93 DeVille failed IL CO and HC emissions - need help
  116. Water
  117. OK the 4.9 ECU mods thread ,lets go!
  118. Need information on an engine rebuild
  119. how do i use the codes
  120. intake question
  121. advanced timing
  122. Another one knockin
  123. egr valve
  124. 4.9 engine idle speed...
  125. Blown Head Gasket maybe?????
  126. Ht4100 Flowmaster Sound Clip!!!!!!!
  127. Lucas oil treatment?
  128. Piston Rings
  129. Startup problem
  130. Dumb Tool Question?
  131. Intake on a Deville...
  132. now what ?
  133. EDAHALL! How do i post sound clips of my FLOWMASTER 40 SERIES delta with the HT4100
  134. Delco vs. Others
  135. Needle in a haystack E53
  136. Will a HT4100 go into an 88 Deville?
  137. A little oil here and a Little oil there
  138. How do you advance timing?
  139. 4.9L '92 Knocking...or missing, help!
  140. Ticking
  141. Rebuilding an HT4100
  142. Engine Swap
  143. Timing Questions...
  144. '90 DeVille 4.5L "hunts" for curb idle
  145. What is most likely source of oil leak?
  146. fuel system??
  147. collectors,bbob anyone,long term storage
  148. Trouble with O2 Sensor
  149. Oil Light
  150. Engine Oil Additive to stop leaks?!?
  151. Got a Reply! on HT4100 TO 4500 Conversion!
  152. Performance Mufflers for 4.9??
  153. Mobil 1 Extended Performance? BBob!
  154. Code 33 Help!!!!
  155. Engine Idle and "almost" stalling problems
  156. Boosting HT4100 Performance
  157. Benefit of using higher mileage vehicle oil?
  158. Exhaust Condensation
  159. bad throttle response
  160. timing newbbb
  161. Does it ever Stop!!!Tuned up and Tuned out
  162. Engine miss at highway speeds.
  163. Mind boggler engine noise
  164. 91 4.9 Excessive Fuel Consumption
  165. 4.5 tbi- performance stuff??
  166. new to me 85 coupe Deville
  167. HELP! 1990 seville shifts to 3rd and freewheels
  168. Engine reliability?
  169. Rough Idle and Missing...
  170. 1992 DeVille Misfiring, or something.
  171. Bad computer? Maybe
  172. air pump to fan to crunk v belt
  173. Can 4.1 be replaced with 305 fuel Injected?
  174. AMAZING fix for hesitation, bad milage
  175. Issues with vacuum lines, Battery light, all in this issue of the 2dfx PMS Thread!
  176. coolant temp light???
  177. 4.9 Fuel Filter clogging...
  178. cadillac eldorado 1991 4.9
  179. ISC Unpluged , wont idle
  180. Loose EGR tube
  181. HT4100 swap. 4.5 or 4.9?
  182. Typical Driveability Problem - 90 Deville
  183. Engine Fire!!! Why Me???
  184. dieseling HT4100....
  185. '82 Eldo Engine dying out, Backfiring through throttle body--Bbobynski please help!!!
  186. intermittent problemn
  187. Sparkplugs
  188. Whats The Best Oil for the HT4100???
  189. Need Help
  190. car running rough now
  191. my baby is sick again , why ??????
  192. Eldorado 4.1 motor problem
  193. Minor tune up
  194. '82 vs. '83 Eldo ECM--ARE THEY INTERCHANGEABLE?!? HELP!!!!
  195. Stupid question for smart people.
  196. Will 4.5 exhaust manifolds fit the HT4100?
  197. '85 eldo 4.1 head leak
  198. OIL Leak??????
  199. 95 deville temp.
  200. 3 questions for all you experts.
  201. 1986 4.1 rebuiled upgrades for more reliability.
  202. Idle Relearn Debate
  203. Fuel Filter Location - 85 Deville (Front Wheel)
  204. HT4100 FLOWMASTER 40series delta flow sound clip
  205. 85 Deville 4100 - Problems Galore
  206. Change Oil Light
  207. compatibility part 2
  208. Please REad need answer ASAP
  209. READ THIS ONE! \/\/ high idle
  210. 90 Deville-surging, missing, after it is warmed up
  211. ECM killing the Injectors?
  212. Someone tell me what a 'transaxle range switch' is!
  213. Electrical problem. Car won't start.
  214. my baby is sick and wont get better :(
  215. Thinking about replacing the 4.9L
  216. Accel Fuel Injectors
  217. I have 2 questions.
  218. Subtle rattling noise possibly from transmission
  219. Redline/shiftpoints for 4.5
  220. two questions pedal and ...
  221. valve spring rates
  222. I wanna know as many 0-60 times as possible!!
  223. Performance Parts for 4.9
  224. 92 Sedan Deville
  225. Car runs hot during long trips
  226. Radiator woes...
  227. How Many of You With Dead Injectors??
  228. 4.9 /Northstar
  229. Coolant shelf life?? No good after 2 years?
  230. compatibility???
  231. Exhaust Options? (photos)
  232. engine oil supplement ?
  233. 4.5 Engine: one dead others dying
  234. air intake mod?
  235. 4100 dual exhaust anyone????
  236. 93 deville heating problem
  237. E98 Isc?
  238. well
  239. High Mileage 4.9L Problems (desperate help needed)
  240. Missing Oil Pump O-ring On Ht4100
  241. 4.9l Deville e41 troubleshooting
  242. ISC RPM out of Range (P030)
  243. Clicking sound from valve covers?
  244. Oh no! trannys slipping
  245. 4.9L Drain Plug Leaking after Coolant Flush -- Help!
  246. 4.9 in rwd configuration?
  247. Fuel Pressure Regulator location?
  248. 4.9L engine low power
  249. here is a good one
  250. rocker arm pivot support