: HT4100 4.1, 4.5, 4.9



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  1. Engine Oil Additive to stop leaks?!?
  2. Got a Reply! on HT4100 TO 4500 Conversion!
  3. Performance Mufflers for 4.9??
  4. Mobil 1 Extended Performance? BBob!
  5. Code 33 Help!!!!
  6. Engine Idle and "almost" stalling problems
  7. Boosting HT4100 Performance
  8. Benefit of using higher mileage vehicle oil?
  9. Exhaust Condensation
  10. bad throttle response
  11. timing newbbb
  12. Does it ever Stop!!!Tuned up and Tuned out
  13. Engine miss at highway speeds.
  14. Mind boggler engine noise
  15. 91 4.9 Excessive Fuel Consumption
  16. 4.5 tbi- performance stuff??
  17. new to me 85 coupe Deville
  18. HELP! 1990 seville shifts to 3rd and freewheels
  19. Engine reliability?
  20. Rough Idle and Missing...
  21. 1992 DeVille Misfiring, or something.
  22. Bad computer? Maybe
  23. air pump to fan to crunk v belt
  24. Can 4.1 be replaced with 305 fuel Injected?
  25. AMAZING fix for hesitation, bad milage
  26. Issues with vacuum lines, Battery light, all in this issue of the 2dfx PMS Thread!
  27. coolant temp light???
  28. 4.9 Fuel Filter clogging...
  29. cadillac eldorado 1991 4.9
  30. ISC Unpluged , wont idle
  31. Loose EGR tube
  32. HT4100 swap. 4.5 or 4.9?
  33. Typical Driveability Problem - 90 Deville
  34. Engine Fire!!! Why Me???
  35. dieseling HT4100....
  36. '82 Eldo Engine dying out, Backfiring through throttle body--Bbobynski please help!!!
  37. intermittent problemn
  38. Sparkplugs
  39. Whats The Best Oil for the HT4100???
  40. Need Help
  41. car running rough now
  42. my baby is sick again , why ??????
  43. Eldorado 4.1 motor problem
  44. Minor tune up
  45. '82 vs. '83 Eldo ECM--ARE THEY INTERCHANGEABLE?!? HELP!!!!
  46. Stupid question for smart people.
  47. Will 4.5 exhaust manifolds fit the HT4100?
  48. '85 eldo 4.1 head leak
  49. OIL Leak??????
  50. 95 deville temp.
  51. 3 questions for all you experts.
  52. 1986 4.1 rebuiled upgrades for more reliability.
  53. Idle Relearn Debate
  54. Fuel Filter Location - 85 Deville (Front Wheel)
  55. HT4100 FLOWMASTER 40series delta flow sound clip
  56. 85 Deville 4100 - Problems Galore
  57. Change Oil Light
  58. compatibility part 2
  59. Please REad need answer ASAP
  60. READ THIS ONE! \/\/ high idle
  61. 90 Deville-surging, missing, after it is warmed up
  62. ECM killing the Injectors?
  63. Someone tell me what a 'transaxle range switch' is!
  64. Electrical problem. Car won't start.
  65. my baby is sick and wont get better :(
  66. Thinking about replacing the 4.9L
  67. Accel Fuel Injectors
  68. I have 2 questions.
  69. Subtle rattling noise possibly from transmission
  70. Redline/shiftpoints for 4.5
  71. two questions pedal and ...
  72. valve spring rates
  73. I wanna know as many 0-60 times as possible!!
  74. Performance Parts for 4.9
  75. 92 Sedan Deville
  76. Car runs hot during long trips
  77. Radiator woes...
  78. How Many of You With Dead Injectors??
  79. 4.9 /Northstar
  80. Coolant shelf life?? No good after 2 years?
  81. compatibility???
  82. Exhaust Options? (photos)
  83. engine oil supplement ?
  84. 4.5 Engine: one dead others dying
  85. air intake mod?
  86. 4100 dual exhaust anyone????
  87. 93 deville heating problem
  88. E98 Isc?
  89. well
  90. High Mileage 4.9L Problems (desperate help needed)
  91. Missing Oil Pump O-ring On Ht4100
  92. 4.9l Deville e41 troubleshooting
  93. ISC RPM out of Range (P030)
  94. Clicking sound from valve covers?
  95. Oh no! trannys slipping
  96. 4.9L Drain Plug Leaking after Coolant Flush -- Help!
  97. 4.9 in rwd configuration?
  98. Fuel Pressure Regulator location?
  99. 4.9L engine low power
  100. here is a good one
  101. rocker arm pivot support
  102. new engine
  103. valve lifter?
  104. please dont be head gasket!!
  105. Starter Removal
  106. module needs ground?
  107. 4.1 vs 4.9
  108. well damn
  109. 4.9 Misfire
  110. P012 bad hall sensor or pick up coil?
  111. Rebuilt Ht4100 With Less Power
  112. Coolant drain locations for a 4.9 (93 SDV)
  113. Metal hose running into side of cat, what is it?
  114. Pulled plugs and compression test *pics*
  115. rip of cat conv and egr??
  116. 4100 coolant capacity
  117. 4.5L A.I.R. Error Code
  118. Increasing Horsepower in 1992 Deville
  119. 4100 Help!!!
  120. Just craps out when I give it gas
  121. He said my cams were out of time....
  122. 4.9 bearing thump
  123. Final Choice: Dynomax SuperTurbos VS. Summit Turbos
  124. Knocking when I give gas to the engine Any one know?!!!
  125. 1991 Cadillac Deville Misfiring
  126. 4.1 engine weight and application ?
  127. Timing advance and still run on MidGrade??
  128. 1990 Eldorado water pump removal help
  129. junkyard ht4100
  130. 1989 4.5L no start when cold. At witts end
  131. Engine runs poorly
  132. 4.5 Engine Woes
  133. Do it right once ....Never see it again
  134. 84Eldo 4.1 won't start
  135. 4.9 Died Again
  136. 4.9L Volcano!!!!
  137. Now I'm getting code 38! What gives?
  138. '84 4.1 running VERY rich, PLEASE HELP!!!!
  139. E30 on Fleetwood 1990
  140. Need Some Help
  141. What's this coming or going out of my cat. converter?
  142. Draining ALL the coolant!!
  143. What's the name of the device (?pump?) under on my 86 deville
  144. car running rich messing up oxygen sensor!
  145. no oil pressure
  146. 90 4.5 Runs Great till it warms up then brakes up.
  147. 4100 tuneing
  148. Engine has a hard time running
  149. i had it out with the cooling system today
  150. temperature erratic
  151. 95 4.9L #7 Cylinder dead, Injector?
  152. 4.9 Cylinder head removal questions
  153. Coolant change.Time or mileage dependant?
  154. Anti-Freeze Coming out of Heater?(fogging up windows)
  155. i changed everything almost ugghh
  156. 4.9L build-up
  157. stuck valve?
  158. I Need a bolt can you help me?
  159. update on my '82
  160. E39 Vcc
  161. WTF is going on!!!(engine runnin crazy!)
  162. 4.1 Low compression
  163. OBD code
  164. popping from carb..
  165. 1984 Having Coooold Start Problems.
  166. won't start when hot
  167. 4100 Heads For Sale
  168. [B][U]4.9 L Performance, 10" Round Air Cleaner[/B][/U]
  169. Head Gaskets or Complete Valve Job
  170. 4100 head bolts
  171. Now this is really weird to me!
  172. 84' seville timing
  173. 4.9 no longer starts
  174. ht4100 loosing power and e codes
  175. 4.1 running rich
  176. Car surges when accelerating
  177. 4.9 HEI ignition
  178. 93 eldorado vs. 92 coupe deville
  179. 4.5 Pinging
  180. Air Mix Door problem code F40
  181. Caddi still not starting
  182. 95 Deville 4.9, Low oil pressure warning
  183. im so cold
  184. Fuel lines
  185. '93 DeVille Gas Mileage Questions
  186. Question for Kcnewell
  187. my '85 FWB died on the interstate...fuel pump?
  188. throttle body cleaning????
  189. another sickening creation of mine!
  190. Coolant supplement
  191. backfiring in park
  192. 4.5 oil pan-bolts gone pan stays on
  193. Crazy overheating problem
  194. Weird Problem
  195. Need to find honest and expert mechanic in Saint Louis Help
  196. 84 Eldorado engine overheating problem
  197. Resurection of a '94 4.9--Advice please!
  198. Jr Shift kit 1-2 rpm shift? but my rebuilt transmission seems great :)
  199. 4.9 low oil pressure warning after head gaskets
  200. Backfiring from the start
  201. I really need help on this.... engine overall performs better, gas millage bad...
  202. 4.9l Engine Knocks when Started
  203. MYSTERY 94'deville water pump
  204. Rattling Rattling Rattling !!
  205. 89 Fleetwood no problems with overheating then 3 days ago leaking antifreeze......
  206. 90-92 350 TBI into 80's Fleetwood Brougham ?
  207. Possible northstar upgrade?
  208. Ignition module failing?
  209. plug wire confusion
  210. please help 4100 problem
  211. advice
  212. 4.5 no heat
  213. 4.1 Runnin a Little Hot at Idle
  214. I hope it's not too late!
  215. 4.1 Cad. Fleetwood Brougham [Tranny Question]
  216. Just installed new M.A.P. sensor now car doesn't even start!
  217. Help With 4100
  218. Help Please Va (engine Problem)
  219. ATF Generic or Name brand???
  220. 1985 deville, coolant in my oil, help
  221. help me bbobynski 4.5 lack of power
  222. '92 4.9 torque converter problem
  223. Car Stall when u hit brake at the stop light sometime
  224. Oil Leaking
  225. smog problems with 84 el dorado timing marks
  226. Help
  227. Quick question: Cradle to cradle / Rear engine/trans mount bolts
  228. Rare Cadillac Options? NM8
  229. 4.5 Fuel Filter replacement
  230. Swap 4.1 out 368 in. Can it be done?
  231. fuel filter location
  232. 93 deville water pump
  233. main bearing seel
  234. 4.9 off idle knocking?
  235. How many mile u got out of your 4.1 engine
  236. hard time starting car
  237. Needed help on 4.1 engine system
  238. 4.9 Idle Learn - Is this honestly it?
  239. 4.5 bad gas mileage and lack of power
  240. Flush at 20k ?Break in proceedure?
  241. 4.9 rpm bounce & bad mpg
  242. 91 4.9 hesitation EGR?
  243. power to fuel injector
  244. HT4100, no power uphill
  245. fuel regulator
  246. Inner wheel tire is spliting
  247. HT4100 Damper Bolt
  248. My car runs the same with or without the egr hooked up
  249. Superchip VS Timing advance
  250. mph limiter