: HT4100 4.1, 4.5, 4.9



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