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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. here is a good one
  2. rocker arm pivot support
  3. new engine
  4. valve lifter?
  5. please dont be head gasket!!
  6. Starter Removal
  7. module needs ground?
  8. 4.1 vs 4.9
  9. well damn
  10. 4.9 Misfire
  11. P012 bad hall sensor or pick up coil?
  12. Rebuilt Ht4100 With Less Power
  13. Coolant drain locations for a 4.9 (93 SDV)
  14. Metal hose running into side of cat, what is it?
  15. Pulled plugs and compression test *pics*
  16. rip of cat conv and egr??
  17. 4100 coolant capacity
  18. 4.5L A.I.R. Error Code
  19. Increasing Horsepower in 1992 Deville
  20. 4100 Help!!!
  21. Just craps out when I give it gas
  22. He said my cams were out of time....
  23. 4.9 bearing thump
  24. Final Choice: Dynomax SuperTurbos VS. Summit Turbos
  25. Knocking when I give gas to the engine Any one know?!!!
  26. 1991 Cadillac Deville Misfiring
  27. 4.1 engine weight and application ?
  28. Timing advance and still run on MidGrade??
  29. 1990 Eldorado water pump removal help
  30. junkyard ht4100
  31. 1989 4.5L no start when cold. At witts end
  32. Engine runs poorly
  33. 4.5 Engine Woes
  34. Do it right once ....Never see it again
  35. 84Eldo 4.1 won't start
  36. 4.9 Died Again
  37. 4.9L Volcano!!!!
  38. Now I'm getting code 38! What gives?
  39. '84 4.1 running VERY rich, PLEASE HELP!!!!
  40. E30 on Fleetwood 1990
  41. Need Some Help
  42. What's this coming or going out of my cat. converter?
  43. Draining ALL the coolant!!
  44. What's the name of the device (?pump?) under on my 86 deville
  45. car running rich messing up oxygen sensor!
  46. no oil pressure
  47. 90 4.5 Runs Great till it warms up then brakes up.
  48. 4100 tuneing
  49. Engine has a hard time running
  50. i had it out with the cooling system today
  51. temperature erratic
  52. 95 4.9L #7 Cylinder dead, Injector?
  53. 4.9 Cylinder head removal questions
  54. Coolant change.Time or mileage dependant?
  55. Anti-Freeze Coming out of Heater?(fogging up windows)
  56. i changed everything almost ugghh
  57. 4.9L build-up
  58. stuck valve?
  59. I Need a bolt can you help me?
  60. update on my '82
  61. E39 Vcc
  62. WTF is going on!!!(engine runnin crazy!)
  63. 4.1 Low compression
  64. OBD code
  65. popping from carb..
  66. 1984 Having Coooold Start Problems.
  67. won't start when hot
  68. 4100 Heads For Sale
  69. [B][U]4.9 L Performance, 10" Round Air Cleaner[/B][/U]
  70. Head Gaskets or Complete Valve Job
  71. 4100 head bolts
  72. Now this is really weird to me!
  73. 84' seville timing
  74. 4.9 no longer starts
  75. ht4100 loosing power and e codes
  76. 4.1 running rich
  77. Car surges when accelerating
  78. 4.9 HEI ignition
  79. 93 eldorado vs. 92 coupe deville
  80. 4.5 Pinging
  81. Air Mix Door problem code F40
  82. Caddi still not starting
  83. 95 Deville 4.9, Low oil pressure warning
  84. im so cold
  85. Fuel lines
  86. '93 DeVille Gas Mileage Questions
  87. Question for Kcnewell
  88. my '85 FWB died on the interstate...fuel pump?
  89. throttle body cleaning????
  90. another sickening creation of mine!
  91. Coolant supplement
  92. backfiring in park
  93. 4.5 oil pan-bolts gone pan stays on
  94. Crazy overheating problem
  95. Weird Problem
  96. Need to find honest and expert mechanic in Saint Louis Help
  97. 84 Eldorado engine overheating problem
  98. Resurection of a '94 4.9--Advice please!
  99. Jr Shift kit 1-2 rpm shift? but my rebuilt transmission seems great :)
  100. 4.9 low oil pressure warning after head gaskets
  101. Backfiring from the start
  102. I really need help on this.... engine overall performs better, gas millage bad...
  103. 4.9l Engine Knocks when Started
  104. MYSTERY 94'deville water pump
  105. Rattling Rattling Rattling !!
  106. 89 Fleetwood no problems with overheating then 3 days ago leaking antifreeze......
  107. 90-92 350 TBI into 80's Fleetwood Brougham ?
  108. Possible northstar upgrade?
  109. Ignition module failing?
  110. plug wire confusion
  111. please help 4100 problem
  112. advice
  113. 4.5 no heat
  114. 4.1 Runnin a Little Hot at Idle
  115. I hope it's not too late!
  116. 4.1 Cad. Fleetwood Brougham [Tranny Question]
  117. Just installed new M.A.P. sensor now car doesn't even start!
  118. Help With 4100
  119. Help Please Va (engine Problem)
  120. ATF Generic or Name brand???
  121. 1985 deville, coolant in my oil, help
  122. help me bbobynski 4.5 lack of power
  123. '92 4.9 torque converter problem
  124. Car Stall when u hit brake at the stop light sometime
  125. Oil Leaking
  126. smog problems with 84 el dorado timing marks
  127. Help
  128. Quick question: Cradle to cradle / Rear engine/trans mount bolts
  129. Rare Cadillac Options? NM8
  130. 4.5 Fuel Filter replacement
  131. Swap 4.1 out 368 in. Can it be done?
  132. fuel filter location
  133. 93 deville water pump
  134. main bearing seel
  135. 4.9 off idle knocking?
  136. How many mile u got out of your 4.1 engine
  137. hard time starting car
  138. Needed help on 4.1 engine system
  139. 4.9 Idle Learn - Is this honestly it?
  140. 4.5 bad gas mileage and lack of power
  141. Flush at 20k ?Break in proceedure?
  142. 4.9 rpm bounce & bad mpg
  143. 91 4.9 hesitation EGR?
  144. power to fuel injector
  145. HT4100, no power uphill
  146. fuel regulator
  147. Inner wheel tire is spliting
  148. HT4100 Damper Bolt
  149. My car runs the same with or without the egr hooked up
  150. Superchip VS Timing advance
  151. mph limiter
  152. Highway millage.... bad....
  153. 88 Eldorado - rough idle, intermittent miss
  154. 4.1vs4.9
  155. Tranny Blew out
  156. Transmission wiring diag.
  157. Car not starting, please help
  158. So what do you like about your 4.9?
  159. 4.9 EGR system....
  160. Th 350
  161. problems removing oil pan - Please Help!
  162. 4.1 to 307 swap question
  163. Exhaust question once again
  164. BBob and anyone else, whats the say on synthetic?
  165. HEI In-cap Coil - What our the differences?
  166. tranny warmup?
  167. These 4.9s have some power!
  168. water pump, water pump, water pump,
  169. 1990 DeVille has" the shakes" and revs on its own
  170. 4.9 pinging not under a load
  171. Barometric Pressure Sensor location
  172. Exhaust leak in engine compartment?
  173. 5W-30 Vs 10W30 for the cold winter?
  174. trans delays shift
  175. Rebuilt motor for an 85
  176. 87 Eldo w 35,000 mi, Change tran fluid?
  177. Fuel Injector Impedance - High/Low
  178. How to make a wooden Engine Support Fixture J-28467
  179. 4.1 Coolant Leak from block-PLEASE HELP!
  180. 84 coupe deville fan shroud
  181. Mileage and Power loss, again.
  182. 4.9 valve cover gasket
  183. C-v joint
  184. 82' couple 4100 - accelerating by itslef - HELP
  185. Do I have to change coolant?
  186. 1990 4.5L Eldroado Engine running rough
  187. 4.9 speed limiter...
  188. Is this the right stuff, going to attempt this weekend
  189. TPS setting
  190. Tune up on a 89 Deville w/ 4.5
  191. Quick Question
  192. 92 eldorado E0085 dtc help pls
  193. Engine Rattle
  194. 4.1 chrome?!
  195. WHat Buttons Do I hit to CHeck the Error COdes On My 93 4.9?
  196. 4.9 off idle stumble
  197. HELP! Would a bad EGR valve cause my car to run rough on the highway?
  198. White Smoke
  199. Radiator Leak
  200. 4.5 Vs 4.9... Compairable?
  201. ROUGH idle , strange code .
  202. 85 Fleetwood FWD Engine Trouble
  203. WTB: ASAP 4.9L Front Exhaust Manifold
  204. 91 Deville 4.9 rough idle
  205. My 86 SedanDeville is running rough above 55mph
  206. Has anyone converted to the electrocruise?
  207. '86 DeVille HT4100 knock - please help :-(
  208. Engine noise while in park?
  209. 4.9 with poor gas mileage. just changed o2
  210. Low Oil Pressure
  211. Changing oil pan gasket
  212. Looking for a couple of VSS wires - '91 Deville
  213. the return of E48/E49
  214. 84' seville is a mess!
  215. EGR Vavle
  216. engine swap
  217. 92deville, idle(rough) Injector service??
  218. CAM sensor
  219. supercharging the 4.9
  220. Please help me with my 4.1..or give me a mechanic who can
  221. How to remove/replace rattling CAT
  222. pellets and 4.5 engine
  223. ohm reading for injectors on 4.5
  224. ? acceptable ohm resistance for injectors
  225. Intermittent Stalling
  226. 4.5 EGR vs. 4.9 EGR
  227. 4.5 engine
  228. Pushrod?
  229. Got new codes today.
  230. 90 Deville Dies while driving
  231. 84 4.1 Swap To 305/350 ?
  232. new to the forum, need a little help (90 4.5l pfi)
  233. Air Pump Seized (4.1 engine)
  234. OBD I codes for 4.x Engines
  235. junked 4.1 installed chevy 5.0 runs great
  236. I replaced my tps and isc but it stall every now an then
  237. Engine running rough
  238. 85 cadillac seville
  239. '93 4.9L Spark Plugs and Wires
  240. TCC location, please Help!!
  241. White smoke still coming from exhaust?
  242. Starter Disabled "Anti-Theft"
  243. need source for 99 cadillac service manuals
  244. HT4100 coolant issue.
  245. 92 (4.9L) stalling
  246. Cars starting to run a little better!
  247. Oil Overfill Cause Engine Damage?
  248. 4T60E Trans Sport Mode???
  249. can't advance computer beyond PCM?
  250. Turbocharge the 4.9L?