: HT4100 4.1, 4.5, 4.9



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  1. 3 questions for all you experts.
  2. 1986 4.1 rebuiled upgrades for more reliability.
  3. Idle Relearn Debate
  4. Fuel Filter Location - 85 Deville (Front Wheel)
  5. HT4100 FLOWMASTER 40series delta flow sound clip
  6. 85 Deville 4100 - Problems Galore
  7. Change Oil Light
  8. compatibility part 2
  9. Please REad need answer ASAP
  10. READ THIS ONE! \/\/ high idle
  11. 90 Deville-surging, missing, after it is warmed up
  12. ECM killing the Injectors?
  13. Someone tell me what a 'transaxle range switch' is!
  14. Electrical problem. Car won't start.
  15. my baby is sick and wont get better :(
  16. Thinking about replacing the 4.9L
  17. Accel Fuel Injectors
  18. I have 2 questions.
  19. Subtle rattling noise possibly from transmission
  20. Redline/shiftpoints for 4.5
  21. two questions pedal and ...
  22. valve spring rates
  23. I wanna know as many 0-60 times as possible!!
  24. Performance Parts for 4.9
  25. 92 Sedan Deville
  26. Car runs hot during long trips
  27. Radiator woes...
  28. How Many of You With Dead Injectors??
  29. 4.9 /Northstar
  30. Coolant shelf life?? No good after 2 years?
  31. compatibility???
  32. Exhaust Options? (photos)
  33. engine oil supplement ?
  34. 4.5 Engine: one dead others dying
  35. air intake mod?
  36. 4100 dual exhaust anyone????
  37. 93 deville heating problem
  38. E98 Isc?
  39. well
  40. High Mileage 4.9L Problems (desperate help needed)
  41. Missing Oil Pump O-ring On Ht4100
  42. 4.9l Deville e41 troubleshooting
  43. ISC RPM out of Range (P030)
  44. Clicking sound from valve covers?
  45. Oh no! trannys slipping
  46. 4.9L Drain Plug Leaking after Coolant Flush -- Help!
  47. 4.9 in rwd configuration?
  48. Fuel Pressure Regulator location?
  49. 4.9L engine low power
  50. here is a good one
  51. rocker arm pivot support
  52. new engine
  53. valve lifter?
  54. please dont be head gasket!!
  55. Starter Removal
  56. module needs ground?
  57. 4.1 vs 4.9
  58. well damn
  59. 4.9 Misfire
  60. P012 bad hall sensor or pick up coil?
  61. Rebuilt Ht4100 With Less Power
  62. Coolant drain locations for a 4.9 (93 SDV)
  63. Metal hose running into side of cat, what is it?
  64. Pulled plugs and compression test *pics*
  65. rip of cat conv and egr??
  66. 4100 coolant capacity
  67. 4.5L A.I.R. Error Code
  68. Increasing Horsepower in 1992 Deville
  69. 4100 Help!!!
  70. Just craps out when I give it gas
  71. He said my cams were out of time....
  72. 4.9 bearing thump
  73. Final Choice: Dynomax SuperTurbos VS. Summit Turbos
  74. Knocking when I give gas to the engine Any one know?!!!
  75. 1991 Cadillac Deville Misfiring
  76. 4.1 engine weight and application ?
  77. Timing advance and still run on MidGrade??
  78. 1990 Eldorado water pump removal help
  79. junkyard ht4100
  80. 1989 4.5L no start when cold. At witts end
  81. Engine runs poorly
  82. 4.5 Engine Woes
  83. Do it right once ....Never see it again
  84. 84Eldo 4.1 won't start
  85. 4.9 Died Again
  86. 4.9L Volcano!!!!
  87. Now I'm getting code 38! What gives?
  88. '84 4.1 running VERY rich, PLEASE HELP!!!!
  89. E30 on Fleetwood 1990
  90. Need Some Help
  91. What's this coming or going out of my cat. converter?
  92. Draining ALL the coolant!!
  93. What's the name of the device (?pump?) under on my 86 deville
  94. car running rich messing up oxygen sensor!
  95. no oil pressure
  96. 90 4.5 Runs Great till it warms up then brakes up.
  97. 4100 tuneing
  98. Engine has a hard time running
  99. i had it out with the cooling system today
  100. temperature erratic
  101. 95 4.9L #7 Cylinder dead, Injector?
  102. 4.9 Cylinder head removal questions
  103. Coolant change.Time or mileage dependant?
  104. Anti-Freeze Coming out of Heater?(fogging up windows)
  105. i changed everything almost ugghh
  106. 4.9L build-up
  107. stuck valve?
  108. I Need a bolt can you help me?
  109. update on my '82
  110. E39 Vcc
  111. WTF is going on!!!(engine runnin crazy!)
  112. 4.1 Low compression
  113. OBD code
  114. popping from carb..
  115. 1984 Having Coooold Start Problems.
  116. won't start when hot
  117. 4100 Heads For Sale
  118. [B][U]4.9 L Performance, 10" Round Air Cleaner[/B][/U]
  119. Head Gaskets or Complete Valve Job
  120. 4100 head bolts
  121. Now this is really weird to me!
  122. 84' seville timing
  123. 4.9 no longer starts
  124. ht4100 loosing power and e codes
  125. 4.1 running rich
  126. Car surges when accelerating
  127. 4.9 HEI ignition
  128. 93 eldorado vs. 92 coupe deville
  129. 4.5 Pinging
  130. Air Mix Door problem code F40
  131. Caddi still not starting
  132. 95 Deville 4.9, Low oil pressure warning
  133. im so cold
  134. Fuel lines
  135. '93 DeVille Gas Mileage Questions
  136. Question for Kcnewell
  137. my '85 FWB died on the interstate...fuel pump?
  138. throttle body cleaning????
  139. another sickening creation of mine!
  140. Coolant supplement
  141. backfiring in park
  142. 4.5 oil pan-bolts gone pan stays on
  143. Crazy overheating problem
  144. Weird Problem
  145. Need to find honest and expert mechanic in Saint Louis Help
  146. 84 Eldorado engine overheating problem
  147. Resurection of a '94 4.9--Advice please!
  148. Jr Shift kit 1-2 rpm shift? but my rebuilt transmission seems great :)
  149. 4.9 low oil pressure warning after head gaskets
  150. Backfiring from the start
  151. I really need help on this.... engine overall performs better, gas millage bad...
  152. 4.9l Engine Knocks when Started
  153. MYSTERY 94'deville water pump
  154. Rattling Rattling Rattling !!
  155. 89 Fleetwood no problems with overheating then 3 days ago leaking antifreeze......
  156. 90-92 350 TBI into 80's Fleetwood Brougham ?
  157. Possible northstar upgrade?
  158. Ignition module failing?
  159. plug wire confusion
  160. please help 4100 problem
  161. advice
  162. 4.5 no heat
  163. 4.1 Runnin a Little Hot at Idle
  164. I hope it's not too late!
  165. 4.1 Cad. Fleetwood Brougham [Tranny Question]
  166. Just installed new M.A.P. sensor now car doesn't even start!
  167. Help With 4100
  168. Help Please Va (engine Problem)
  169. ATF Generic or Name brand???
  170. 1985 deville, coolant in my oil, help
  171. help me bbobynski 4.5 lack of power
  172. '92 4.9 torque converter problem
  173. Car Stall when u hit brake at the stop light sometime
  174. Oil Leaking
  175. smog problems with 84 el dorado timing marks
  176. Help
  177. Quick question: Cradle to cradle / Rear engine/trans mount bolts
  178. Rare Cadillac Options? NM8
  179. 4.5 Fuel Filter replacement
  180. Swap 4.1 out 368 in. Can it be done?
  181. fuel filter location
  182. 93 deville water pump
  183. main bearing seel
  184. 4.9 off idle knocking?
  185. How many mile u got out of your 4.1 engine
  186. hard time starting car
  187. Needed help on 4.1 engine system
  188. 4.9 Idle Learn - Is this honestly it?
  189. 4.5 bad gas mileage and lack of power
  190. Flush at 20k ?Break in proceedure?
  191. 4.9 rpm bounce & bad mpg
  192. 91 4.9 hesitation EGR?
  193. power to fuel injector
  194. HT4100, no power uphill
  195. fuel regulator
  196. Inner wheel tire is spliting
  197. HT4100 Damper Bolt
  198. My car runs the same with or without the egr hooked up
  199. Superchip VS Timing advance
  200. mph limiter
  201. Highway millage.... bad....
  202. 88 Eldorado - rough idle, intermittent miss
  203. 4.1vs4.9
  204. Tranny Blew out
  205. Transmission wiring diag.
  206. Car not starting, please help
  207. So what do you like about your 4.9?
  208. 4.9 EGR system....
  209. Th 350
  210. problems removing oil pan - Please Help!
  211. 4.1 to 307 swap question
  212. Exhaust question once again
  213. BBob and anyone else, whats the say on synthetic?
  214. HEI In-cap Coil - What our the differences?
  215. tranny warmup?
  216. These 4.9s have some power!
  217. water pump, water pump, water pump,
  218. 1990 DeVille has" the shakes" and revs on its own
  219. 4.9 pinging not under a load
  220. Barometric Pressure Sensor location
  221. Exhaust leak in engine compartment?
  222. 5W-30 Vs 10W30 for the cold winter?
  223. trans delays shift
  224. Rebuilt motor for an 85
  225. 87 Eldo w 35,000 mi, Change tran fluid?
  226. Fuel Injector Impedance - High/Low
  227. How to make a wooden Engine Support Fixture J-28467
  228. 4.1 Coolant Leak from block-PLEASE HELP!
  229. 84 coupe deville fan shroud
  230. Mileage and Power loss, again.
  231. 4.9 valve cover gasket
  232. C-v joint
  233. 82' couple 4100 - accelerating by itslef - HELP
  234. Do I have to change coolant?
  235. 1990 4.5L Eldroado Engine running rough
  236. 4.9 speed limiter...
  237. Is this the right stuff, going to attempt this weekend
  238. TPS setting
  239. Tune up on a 89 Deville w/ 4.5
  240. Quick Question
  241. 92 eldorado E0085 dtc help pls
  242. Engine Rattle
  243. 4.1 chrome?!
  244. WHat Buttons Do I hit to CHeck the Error COdes On My 93 4.9?
  245. 4.9 off idle stumble
  246. HELP! Would a bad EGR valve cause my car to run rough on the highway?
  247. White Smoke
  248. Radiator Leak
  249. 4.5 Vs 4.9... Compairable?
  250. ROUGH idle , strange code .