: HT4100 4.1, 4.5, 4.9



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  1. Engine reliability?
  2. Rough Idle and Missing...
  3. 1992 DeVille Misfiring, or something.
  4. Bad computer? Maybe
  5. air pump to fan to crunk v belt
  6. Can 4.1 be replaced with 305 fuel Injected?
  7. AMAZING fix for hesitation, bad milage
  8. Issues with vacuum lines, Battery light, all in this issue of the 2dfx PMS Thread!
  9. coolant temp light???
  10. 4.9 Fuel Filter clogging...
  11. cadillac eldorado 1991 4.9
  12. ISC Unpluged , wont idle
  13. Loose EGR tube
  14. HT4100 swap. 4.5 or 4.9?
  15. Typical Driveability Problem - 90 Deville
  16. Engine Fire!!! Why Me???
  17. dieseling HT4100....
  18. '82 Eldo Engine dying out, Backfiring through throttle body--Bbobynski please help!!!
  19. intermittent problemn
  20. Sparkplugs
  21. Whats The Best Oil for the HT4100???
  22. Need Help
  23. car running rough now
  24. my baby is sick again , why ??????
  25. Eldorado 4.1 motor problem
  26. Minor tune up
  27. '82 vs. '83 Eldo ECM--ARE THEY INTERCHANGEABLE?!? HELP!!!!
  28. Stupid question for smart people.
  29. Will 4.5 exhaust manifolds fit the HT4100?
  30. '85 eldo 4.1 head leak
  31. OIL Leak??????
  32. 95 deville temp.
  33. 3 questions for all you experts.
  34. 1986 4.1 rebuiled upgrades for more reliability.
  35. Idle Relearn Debate
  36. Fuel Filter Location - 85 Deville (Front Wheel)
  37. HT4100 FLOWMASTER 40series delta flow sound clip
  38. 85 Deville 4100 - Problems Galore
  39. Change Oil Light
  40. compatibility part 2
  41. Please REad need answer ASAP
  42. READ THIS ONE! \/\/ high idle
  43. 90 Deville-surging, missing, after it is warmed up
  44. ECM killing the Injectors?
  45. Someone tell me what a 'transaxle range switch' is!
  46. Electrical problem. Car won't start.
  47. my baby is sick and wont get better :(
  48. Thinking about replacing the 4.9L
  49. Accel Fuel Injectors
  50. I have 2 questions.
  51. Subtle rattling noise possibly from transmission
  52. Redline/shiftpoints for 4.5
  53. two questions pedal and ...
  54. valve spring rates
  55. I wanna know as many 0-60 times as possible!!
  56. Performance Parts for 4.9
  57. 92 Sedan Deville
  58. Car runs hot during long trips
  59. Radiator woes...
  60. How Many of You With Dead Injectors??
  61. 4.9 /Northstar
  62. Coolant shelf life?? No good after 2 years?
  63. compatibility???
  64. Exhaust Options? (photos)
  65. engine oil supplement ?
  66. 4.5 Engine: one dead others dying
  67. air intake mod?
  68. 4100 dual exhaust anyone????
  69. 93 deville heating problem
  70. E98 Isc?
  71. well
  72. High Mileage 4.9L Problems (desperate help needed)
  73. Missing Oil Pump O-ring On Ht4100
  74. 4.9l Deville e41 troubleshooting
  75. ISC RPM out of Range (P030)
  76. Clicking sound from valve covers?
  77. Oh no! trannys slipping
  78. 4.9L Drain Plug Leaking after Coolant Flush -- Help!
  79. 4.9 in rwd configuration?
  80. Fuel Pressure Regulator location?
  81. 4.9L engine low power
  82. here is a good one
  83. rocker arm pivot support
  84. new engine
  85. valve lifter?
  86. please dont be head gasket!!
  87. Starter Removal
  88. module needs ground?
  89. 4.1 vs 4.9
  90. well damn
  91. 4.9 Misfire
  92. P012 bad hall sensor or pick up coil?
  93. Rebuilt Ht4100 With Less Power
  94. Coolant drain locations for a 4.9 (93 SDV)
  95. Metal hose running into side of cat, what is it?
  96. Pulled plugs and compression test *pics*
  97. rip of cat conv and egr??
  98. 4100 coolant capacity
  99. 4.5L A.I.R. Error Code
  100. Increasing Horsepower in 1992 Deville
  101. 4100 Help!!!
  102. Just craps out when I give it gas
  103. He said my cams were out of time....
  104. 4.9 bearing thump
  105. Final Choice: Dynomax SuperTurbos VS. Summit Turbos
  106. Knocking when I give gas to the engine Any one know?!!!
  107. 1991 Cadillac Deville Misfiring
  108. 4.1 engine weight and application ?
  109. Timing advance and still run on MidGrade??
  110. 1990 Eldorado water pump removal help
  111. junkyard ht4100
  112. 1989 4.5L no start when cold. At witts end
  113. Engine runs poorly
  114. 4.5 Engine Woes
  115. Do it right once ....Never see it again
  116. 84Eldo 4.1 won't start
  117. 4.9 Died Again
  118. 4.9L Volcano!!!!
  119. Now I'm getting code 38! What gives?
  120. '84 4.1 running VERY rich, PLEASE HELP!!!!
  121. E30 on Fleetwood 1990
  122. Need Some Help
  123. What's this coming or going out of my cat. converter?
  124. Draining ALL the coolant!!
  125. What's the name of the device (?pump?) under on my 86 deville
  126. car running rich messing up oxygen sensor!
  127. no oil pressure
  128. 90 4.5 Runs Great till it warms up then brakes up.
  129. 4100 tuneing
  130. Engine has a hard time running
  131. i had it out with the cooling system today
  132. temperature erratic
  133. 95 4.9L #7 Cylinder dead, Injector?
  134. 4.9 Cylinder head removal questions
  135. Coolant change.Time or mileage dependant?
  136. Anti-Freeze Coming out of Heater?(fogging up windows)
  137. i changed everything almost ugghh
  138. 4.9L build-up
  139. stuck valve?
  140. I Need a bolt can you help me?
  141. update on my '82
  142. E39 Vcc
  143. WTF is going on!!!(engine runnin crazy!)
  144. 4.1 Low compression
  145. OBD code
  146. popping from carb..
  147. 1984 Having Coooold Start Problems.
  148. won't start when hot
  149. 4100 Heads For Sale
  150. [B][U]4.9 L Performance, 10" Round Air Cleaner[/B][/U]
  151. Head Gaskets or Complete Valve Job
  152. 4100 head bolts
  153. Now this is really weird to me!
  154. 84' seville timing
  155. 4.9 no longer starts
  156. ht4100 loosing power and e codes
  157. 4.1 running rich
  158. Car surges when accelerating
  159. 4.9 HEI ignition
  160. 93 eldorado vs. 92 coupe deville
  161. 4.5 Pinging
  162. Air Mix Door problem code F40
  163. Caddi still not starting
  164. 95 Deville 4.9, Low oil pressure warning
  165. im so cold
  166. Fuel lines
  167. '93 DeVille Gas Mileage Questions
  168. Question for Kcnewell
  169. my '85 FWB died on the interstate...fuel pump?
  170. throttle body cleaning????
  171. another sickening creation of mine!
  172. Coolant supplement
  173. backfiring in park
  174. 4.5 oil pan-bolts gone pan stays on
  175. Crazy overheating problem
  176. Weird Problem
  177. Need to find honest and expert mechanic in Saint Louis Help
  178. 84 Eldorado engine overheating problem
  179. Resurection of a '94 4.9--Advice please!
  180. Jr Shift kit 1-2 rpm shift? but my rebuilt transmission seems great :)
  181. 4.9 low oil pressure warning after head gaskets
  182. Backfiring from the start
  183. I really need help on this.... engine overall performs better, gas millage bad...
  184. 4.9l Engine Knocks when Started
  185. MYSTERY 94'deville water pump
  186. Rattling Rattling Rattling !!
  187. 89 Fleetwood no problems with overheating then 3 days ago leaking antifreeze......
  188. 90-92 350 TBI into 80's Fleetwood Brougham ?
  189. Possible northstar upgrade?
  190. Ignition module failing?
  191. plug wire confusion
  192. please help 4100 problem
  193. advice
  194. 4.5 no heat
  195. 4.1 Runnin a Little Hot at Idle
  196. I hope it's not too late!
  197. 4.1 Cad. Fleetwood Brougham [Tranny Question]
  198. Just installed new M.A.P. sensor now car doesn't even start!
  199. Help With 4100
  200. Help Please Va (engine Problem)
  201. ATF Generic or Name brand???
  202. 1985 deville, coolant in my oil, help
  203. help me bbobynski 4.5 lack of power
  204. '92 4.9 torque converter problem
  205. Car Stall when u hit brake at the stop light sometime
  206. Oil Leaking
  207. smog problems with 84 el dorado timing marks
  208. Help
  209. Quick question: Cradle to cradle / Rear engine/trans mount bolts
  210. Rare Cadillac Options? NM8
  211. 4.5 Fuel Filter replacement
  212. Swap 4.1 out 368 in. Can it be done?
  213. fuel filter location
  214. 93 deville water pump
  215. main bearing seel
  216. 4.9 off idle knocking?
  217. How many mile u got out of your 4.1 engine
  218. hard time starting car
  219. Needed help on 4.1 engine system
  220. 4.9 Idle Learn - Is this honestly it?
  221. 4.5 bad gas mileage and lack of power
  222. Flush at 20k ?Break in proceedure?
  223. 4.9 rpm bounce & bad mpg
  224. 91 4.9 hesitation EGR?
  225. power to fuel injector
  226. HT4100, no power uphill
  227. fuel regulator
  228. Inner wheel tire is spliting
  229. HT4100 Damper Bolt
  230. My car runs the same with or without the egr hooked up
  231. Superchip VS Timing advance
  232. mph limiter
  233. Highway millage.... bad....
  234. 88 Eldorado - rough idle, intermittent miss
  235. 4.1vs4.9
  236. Tranny Blew out
  237. Transmission wiring diag.
  238. Car not starting, please help
  239. So what do you like about your 4.9?
  240. 4.9 EGR system....
  241. Th 350
  242. problems removing oil pan - Please Help!
  243. 4.1 to 307 swap question
  244. Exhaust question once again
  245. BBob and anyone else, whats the say on synthetic?
  246. HEI In-cap Coil - What our the differences?
  247. tranny warmup?
  248. These 4.9s have some power!
  249. water pump, water pump, water pump,
  250. 1990 DeVille has" the shakes" and revs on its own