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View Full Version : HT4100 4.1, 4.5, 4.9

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