: HT4100 4.1, 4.5, 4.9



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  1. Water
  2. OK the 4.9 ECU mods thread ,lets go!
  3. Need information on an engine rebuild
  4. how do i use the codes
  5. intake question
  6. advanced timing
  7. Another one knockin
  8. egr valve
  9. 4.9 engine idle speed...
  10. Blown Head Gasket maybe?????
  11. Ht4100 Flowmaster Sound Clip!!!!!!!
  12. Lucas oil treatment?
  13. Piston Rings
  14. Startup problem
  15. Dumb Tool Question?
  16. Intake on a Deville...
  17. now what ?
  18. EDAHALL! How do i post sound clips of my FLOWMASTER 40 SERIES delta with the HT4100
  19. Delco vs. Others
  20. Needle in a haystack E53
  21. Will a HT4100 go into an 88 Deville?
  22. A little oil here and a Little oil there
  23. How do you advance timing?
  24. 4.9L '92 Knocking...or missing, help!
  25. Ticking
  26. Rebuilding an HT4100
  27. Engine Swap
  28. Timing Questions...
  29. '90 DeVille 4.5L "hunts" for curb idle
  30. What is most likely source of oil leak?
  31. fuel system??
  32. collectors,bbob anyone,long term storage
  33. Trouble with O2 Sensor
  34. Oil Light
  35. Engine Oil Additive to stop leaks?!?
  36. Got a Reply! on HT4100 TO 4500 Conversion!
  37. Performance Mufflers for 4.9??
  38. Mobil 1 Extended Performance? BBob!
  39. Code 33 Help!!!!
  40. Engine Idle and "almost" stalling problems
  41. Boosting HT4100 Performance
  42. Benefit of using higher mileage vehicle oil?
  43. Exhaust Condensation
  44. bad throttle response
  45. timing newbbb
  46. Does it ever Stop!!!Tuned up and Tuned out
  47. Engine miss at highway speeds.
  48. Mind boggler engine noise
  49. 91 4.9 Excessive Fuel Consumption
  50. 4.5 tbi- performance stuff??
  51. new to me 85 coupe Deville
  52. HELP! 1990 seville shifts to 3rd and freewheels
  53. Engine reliability?
  54. Rough Idle and Missing...
  55. 1992 DeVille Misfiring, or something.
  56. Bad computer? Maybe
  57. air pump to fan to crunk v belt
  58. Can 4.1 be replaced with 305 fuel Injected?
  59. AMAZING fix for hesitation, bad milage
  60. Issues with vacuum lines, Battery light, all in this issue of the 2dfx PMS Thread!
  61. coolant temp light???
  62. 4.9 Fuel Filter clogging...
  63. cadillac eldorado 1991 4.9
  64. ISC Unpluged , wont idle
  65. Loose EGR tube
  66. HT4100 swap. 4.5 or 4.9?
  67. Typical Driveability Problem - 90 Deville
  68. Engine Fire!!! Why Me???
  69. dieseling HT4100....
  70. '82 Eldo Engine dying out, Backfiring through throttle body--Bbobynski please help!!!
  71. intermittent problemn
  72. Sparkplugs
  73. Whats The Best Oil for the HT4100???
  74. Need Help
  75. car running rough now
  76. my baby is sick again , why ??????
  77. Eldorado 4.1 motor problem
  78. Minor tune up
  79. '82 vs. '83 Eldo ECM--ARE THEY INTERCHANGEABLE?!? HELP!!!!
  80. Stupid question for smart people.
  81. Will 4.5 exhaust manifolds fit the HT4100?
  82. '85 eldo 4.1 head leak
  83. OIL Leak??????
  84. 95 deville temp.
  85. 3 questions for all you experts.
  86. 1986 4.1 rebuiled upgrades for more reliability.
  87. Idle Relearn Debate
  88. Fuel Filter Location - 85 Deville (Front Wheel)
  89. HT4100 FLOWMASTER 40series delta flow sound clip
  90. 85 Deville 4100 - Problems Galore
  91. Change Oil Light
  92. compatibility part 2
  93. Please REad need answer ASAP
  94. READ THIS ONE! \/\/ high idle
  95. 90 Deville-surging, missing, after it is warmed up
  96. ECM killing the Injectors?
  97. Someone tell me what a 'transaxle range switch' is!
  98. Electrical problem. Car won't start.
  99. my baby is sick and wont get better :(
  100. Thinking about replacing the 4.9L
  101. Accel Fuel Injectors
  102. I have 2 questions.
  103. Subtle rattling noise possibly from transmission
  104. Redline/shiftpoints for 4.5
  105. two questions pedal and ...
  106. valve spring rates
  107. I wanna know as many 0-60 times as possible!!
  108. Performance Parts for 4.9
  109. 92 Sedan Deville
  110. Car runs hot during long trips
  111. Radiator woes...
  112. How Many of You With Dead Injectors??
  113. 4.9 /Northstar
  114. Coolant shelf life?? No good after 2 years?
  115. compatibility???
  116. Exhaust Options? (photos)
  117. engine oil supplement ?
  118. 4.5 Engine: one dead others dying
  119. air intake mod?
  120. 4100 dual exhaust anyone????
  121. 93 deville heating problem
  122. E98 Isc?
  123. well
  124. High Mileage 4.9L Problems (desperate help needed)
  125. Missing Oil Pump O-ring On Ht4100
  126. 4.9l Deville e41 troubleshooting
  127. ISC RPM out of Range (P030)
  128. Clicking sound from valve covers?
  129. Oh no! trannys slipping
  130. 4.9L Drain Plug Leaking after Coolant Flush -- Help!
  131. 4.9 in rwd configuration?
  132. Fuel Pressure Regulator location?
  133. 4.9L engine low power
  134. here is a good one
  135. rocker arm pivot support
  136. new engine
  137. valve lifter?
  138. please dont be head gasket!!
  139. Starter Removal
  140. module needs ground?
  141. 4.1 vs 4.9
  142. well damn
  143. 4.9 Misfire
  144. P012 bad hall sensor or pick up coil?
  145. Rebuilt Ht4100 With Less Power
  146. Coolant drain locations for a 4.9 (93 SDV)
  147. Metal hose running into side of cat, what is it?
  148. Pulled plugs and compression test *pics*
  149. rip of cat conv and egr??
  150. 4100 coolant capacity
  151. 4.5L A.I.R. Error Code
  152. Increasing Horsepower in 1992 Deville
  153. 4100 Help!!!
  154. Just craps out when I give it gas
  155. He said my cams were out of time....
  156. 4.9 bearing thump
  157. Final Choice: Dynomax SuperTurbos VS. Summit Turbos
  158. Knocking when I give gas to the engine Any one know?!!!
  159. 1991 Cadillac Deville Misfiring
  160. 4.1 engine weight and application ?
  161. Timing advance and still run on MidGrade??
  162. 1990 Eldorado water pump removal help
  163. junkyard ht4100
  164. 1989 4.5L no start when cold. At witts end
  165. Engine runs poorly
  166. 4.5 Engine Woes
  167. Do it right once ....Never see it again
  168. 84Eldo 4.1 won't start
  169. 4.9 Died Again
  170. 4.9L Volcano!!!!
  171. Now I'm getting code 38! What gives?
  172. '84 4.1 running VERY rich, PLEASE HELP!!!!
  173. E30 on Fleetwood 1990
  174. Need Some Help
  175. What's this coming or going out of my cat. converter?
  176. Draining ALL the coolant!!
  177. What's the name of the device (?pump?) under on my 86 deville
  178. car running rich messing up oxygen sensor!
  179. no oil pressure
  180. 90 4.5 Runs Great till it warms up then brakes up.
  181. 4100 tuneing
  182. Engine has a hard time running
  183. i had it out with the cooling system today
  184. temperature erratic
  185. 95 4.9L #7 Cylinder dead, Injector?
  186. 4.9 Cylinder head removal questions
  187. Coolant change.Time or mileage dependant?
  188. Anti-Freeze Coming out of Heater?(fogging up windows)
  189. i changed everything almost ugghh
  190. 4.9L build-up
  191. stuck valve?
  192. I Need a bolt can you help me?
  193. update on my '82
  194. E39 Vcc
  195. WTF is going on!!!(engine runnin crazy!)
  196. 4.1 Low compression
  197. OBD code
  198. popping from carb..
  199. 1984 Having Coooold Start Problems.
  200. won't start when hot
  201. 4100 Heads For Sale
  202. [B][U]4.9 L Performance, 10" Round Air Cleaner[/B][/U]
  203. Head Gaskets or Complete Valve Job
  204. 4100 head bolts
  205. Now this is really weird to me!
  206. 84' seville timing
  207. 4.9 no longer starts
  208. ht4100 loosing power and e codes
  209. 4.1 running rich
  210. Car surges when accelerating
  211. 4.9 HEI ignition
  212. 93 eldorado vs. 92 coupe deville
  213. 4.5 Pinging
  214. Air Mix Door problem code F40
  215. Caddi still not starting
  216. 95 Deville 4.9, Low oil pressure warning
  217. im so cold
  218. Fuel lines
  219. '93 DeVille Gas Mileage Questions
  220. Question for Kcnewell
  221. my '85 FWB died on the interstate...fuel pump?
  222. throttle body cleaning????
  223. another sickening creation of mine!
  224. Coolant supplement
  225. backfiring in park
  226. 4.5 oil pan-bolts gone pan stays on
  227. Crazy overheating problem
  228. Weird Problem
  229. Need to find honest and expert mechanic in Saint Louis Help
  230. 84 Eldorado engine overheating problem
  231. Resurection of a '94 4.9--Advice please!
  232. Jr Shift kit 1-2 rpm shift? but my rebuilt transmission seems great :)
  233. 4.9 low oil pressure warning after head gaskets
  234. Backfiring from the start
  235. I really need help on this.... engine overall performs better, gas millage bad...
  236. 4.9l Engine Knocks when Started
  237. MYSTERY 94'deville water pump
  238. Rattling Rattling Rattling !!
  239. 89 Fleetwood no problems with overheating then 3 days ago leaking antifreeze......
  240. 90-92 350 TBI into 80's Fleetwood Brougham ?
  241. Possible northstar upgrade?
  242. Ignition module failing?
  243. plug wire confusion
  244. please help 4100 problem
  245. advice
  246. 4.5 no heat
  247. 4.1 Runnin a Little Hot at Idle
  248. I hope it's not too late!
  249. 4.1 Cad. Fleetwood Brougham [Tranny Question]
  250. Just installed new M.A.P. sensor now car doesn't even start!