: HT4100 4.1, 4.5, 4.9



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  1. 4.1 Rough Idle
  2. Best (Worst) Air Filters to Use
  3. 4.9L performance upgrades?
  4. 4.1 to 4.5 swap
  5. How much for New Head Gaskets?
  6. new mat and coolent sensors
  7. rough idle and sputtering
  8. 4.1 exhaust manifold
  9. 4.9 Head Gasket
  10. problem with "service engine soon"
  11. Advance timing on 4.9
  12. What MPG for 87 Eldorado, 4.1?
  13. E048 EGR fault code how to fix?
  14. 4.9 And The Gas Mileage Sucks!!!
  15. Any way to disable the ses light?
  16. 95 deville tranny question
  17. 92' dies then restarts by its self
  18. ECM pinouts
  19. Dead 89 deville engine
  20. Going to be a long weekend
  21. A few questions for the Caddy Experts 4.9L
  22. old radiator cap problematic?
  23. 4.9 ltr
  24. 4.9 reliability :P
  25. Help With Code
  26. confused
  27. 4.9 Ltr Timing Belt?
  28. Drive ADL switch?
  29. spark plug question
  30. code ro15
  31. 92 Fleetwood 4.9 hesitation/code help
  32. 4.5 no start, no life. sorta familiar
  33. Yea another code ??
  34. 4.1 Operating Temperatures
  35. coolant leak
  36. A few questions regarding the 4.9
  37. code questions please...
  38. Throttle body bolt stripped out of intake manifold
  39. steering wheel will lock up and car cut off
  40. Help with 89 Sedan deVille codes...
  41. how good are the bottom ends on the 4.9?
  42. E98 code - help!!??
  43. 4.9L northstar
  44. Need help ... engine kicks, accelerates/revs itself
  45. '89 DeVille a/c not working
  46. HT4100 Stalling
  47. 4.9 oil consumption
  48. ht 4100 change over to 350 chevy
  49. Will 4.9 heads fit on a 4.1 block?
  50. Thinking about getting a new coil
  51. 87 Cadillac Seville ,4.1 with blown head gasket
  52. Hi. I need lots of help concerning the 4.9L. Thanks.
  53. timing a 4.5
  54. pulley bearing? serpentine belt not moving
  55. Hub on crankshaft
  56. Tackling Motor mount Replacement-92 Seville(4.9)
  57. 1. Diag Codes 2. Engine Stall
  58. squeek squeek .my speedo cable i think
  59. coolant in oil in my new motor
  60. coolant in oil
  61. Reconnecting Spark Plug Wires - 4.9L
  62. rough poor idle on 91 Seville STS 4.9 ideas?
  63. bbob???
  64. Better MPG with 87 Octane
  65. Preliminary tune-up
  66. car from hell
  67. 1988 Coupe Deville 4.5 ECM problem
  68. Please Help!!!
  69. Well, it cranked but...
  70. 4.9 heads on a 4.5
  71. 1990 fleetwood 4.5 fuel filter and thermostat location????
  72. 4.1 V6 and 4.1 V8
  73. Does the bars leak that comes in the gray bottle do the same thing as the tablets?
  74. 93 SDV trans question
  75. can anyone shine some light on me
  76. What's wrong with my 4100?
  77. What are some tricks to make the 4100 last a long time?
  78. hurt caddy
  79. torque specs for belt tensioner pulley
  80. Need trouble codes for '83 HT-4100 Eldo
  81. 93 loud knocking within engine, while in park
  82. ht4100
  83. I bought my muffler
  84. Valve belts?
  85. gas leak
  86. Just got 3 codes, need some help!
  87. Needing help with a few things....
  88. How can I reset codes on '83 Eldo
  89. 4.9 motor buildup pics...
  90. oil light flickers at idle
  91. 83 coupe deville 4100???
  92. 1987 Fleetwood problems, maybe you guys know or been through it?
  93. how do i...
  94. Cracked Manifold
  95. Bad mpg and very throaty problem
  96. Weird ~ I like the 87 4100 growl
  97. How to check codes for A/C unit?
  98. 3 fan fault message in my 88 seville help?
  99. Fuel injector service
  100. starting
  101. flywheel to torque converter bolts
  102. Harmonic balancer 83 Fwd In-Line 4.1
  103. 4100 with 92K
  104. Newbie needs tranny and code help
  105. Deville still will not start...
  106. knocking solved
  107. Almost ready to pull the ht4100
  108. no fuel
  109. Safety Safety Safety !
  110. A Little Different No Start Problem
  111. 95 Deville Wont Start...Boo
  112. 4.9 being weird help!!!
  113. A/C help?????
  114. E67 error, any ideas?
  115. Water in door!
  116. Air Conditioning
  117. A/C Question for '92 STS
  118. ITS DONE....I finally have a smooth QUIET Cadillac
  119. ht4100 mounting to engine stand bolt size?
  120. '94 4.9 won't start!
  121. 1988 Alante will not run
  122. Swap Question 4100 (electronics)
  123. Let me tell you, water pump replacement is a pain in the @$$.
  124. 4T60E slipping
  125. Proper Engine Break In Reman 4.1
  126. Cadillac Coral?
  127. 4.1 Biarritz hesitation and stalling - long with lots of info!
  128. Marked surge at light throttle
  129. 4.1 Saddened
  130. 95 deville 4.9 miss at idle
  131. newbie
  132. Repeated O2 Sensor Problem 91 4.9l
  133. Bars Golden Seal Powder Stop Leak And Other Stuff (Deals?)
  134. Need second opinion 4.1 swap to northstar
  135. gonna replace the 4100 on 83 cadillac deville would it be possible to put a chevy 350
  136. Is my 4.9 on the way out?
  137. Installing Reman Ht 4.1 Oil And Coolant Suggestions
  138. What should I do if I put too much bars leak in?
  139. E-030 + Poor Mileage + Bouncing High Idle At Startup
  140. Transmission Looseing fluid , 1 qt per minute
  141. OMG..Maybe it is the water pump. THIS IS ANNOYING.
  142. can the 4.5 handle and 50-75 shot of nitrous
  143. tps................. help!
  144. Took off the belt and its not the waterpump making noise..need help
  145. EGR Malfunction -- Please Help
  146. Waterpump Replacement
  147. Muffler pictures
  148. Throttle position sensor question
  149. advancing the timing question
  150. Vibrating noise around throttle body
  151. 4.9 spark knock
  152. Muffler
  153. Changed coolant without pellets; what to do??
  154. injectors
  155. 94 sedan deville serpentine belt
  156. How hard to replace radiator out of 92 Deville?
  157. Crack in exhaust manifold
  158. Help Plz
  159. Re:Eldo 403FI swap w/MEGASQUIRT ?
  160. Turns out I have a bad water pump.
  161. replacing 4.1 with chevy 5.0
  162. 4.9 leaking oil?
  163. gaskets, paint, parts cleaner
  164. ht 4100 4.1 swap to a 4.9
  165. Questions About Eldorado Country site/info ---403FI swap
  166. 87 DeVille 36k ori. miles
  167. Codes are back!
  168. HP gains from no cat?
  169. 91 deville oxygen sensor(s) location
  170. 1988 deville fuel pump harness question
  171. 1990 SDV tranny- Please help
  172. 88 eldo Special fuel line tool?
  173. Car make caveman brain hurt
  174. Need help with front main bearing!
  175. Surging/cutting out? 1991 Deville 4.9
  176. Gasket to Oil line connector in Radiator.
  177. OH-NO!! The dreaded 4.1 "knocking".
  178. Bbob - Don't flush trans
  179. 94 deville , distrib will be turned the wrong way soon
  180. 93 Caddy seville 4.9
  181. Octane booster/ fuel saver
  182. Rough running (4.1) and ditrib question
  183. engine almost plucked
  184. Replacing Water Pump Too Often
  185. Like illumina said "or that pesky gm module"
  186. to chip or not to chip???
  187. Rebuilding my '88 THM440-T4 ie 4t60
  188. exhaust sound when it rains
  189. Slight Problem, need help
  190. Timming a '85 RWD 4.1...
  191. My mechanic recommended not using bars leak sealant?
  192. quiet, thoaty exhaust
  193. Do you have to set timing after change distributor and cap?
  194. procharger supercharger?
  195. Oil Adapter Hose Fittings
  196. Car won't start; noticed no spark at plug
  197. 90devilleguy, a question about your Muffler!
  198. smog pump replacement 4.5
  199. 83 Eldo Touring 4.1 Engine HELP
  200. 4.9L seville stall/restart problem
  201. Hot starting idling
  202. 4.9 family no hot start issue fix
  203. New to Forum seeking Info in 83 Eldo 4.1 swap and trans
  204. 1990 Cadillac Fleetwood 4.5 FWD
  205. Car cuts Off
  206. another issue (gas guzzler)
  207. part II to my car starting mystery
  208. Trouble codes
  209. car cut off and didn't start until the next day
  210. 1988 Cad SDV motor mounts
  211. 92 STS Engine Stall at low speed...HELP !
  212. Hey aguthmiller I have a few questions
  213. Water in the Oil ... How can it get there?
  214. Will new distributor cap and rotor make car run better?
  215. 94 Deville 4.9 Part Throttle Ping
  216. 92 4.9L Engine Reassembly - my heads are off and engine is in car.
  217. water in oil - Broke down on trip in Coffee Springs Alabama
  218. stuttering problem at idle
  219. 4.5 for 4.1 swap
  220. Got myself an 82 Coupe Deville, having some probs..
  221. 90 sedan deville right blinker acting up
  222. Will top end cleaning be good or bad for an engine with 130K on it??
  223. ALDL location
  224. Best swap for 4.1?
  225. What should I expect for my 0-60
  226. Fuel Pump circuit problem 84 Brougham
  227. 1984 Sedan DeVille over 200,000 miles?
  228. 90 Seville, Code E041
  229. **TH440 - 4.5 FWD - Trans **
  230. 89 4.5 deville overheated
  231. Flowmaster Muffler Installation Pics
  232. 4T60E Leak , ENOUGH IS ENOUGH !!
  233. 90 deville 4.5 125k doggin on freeway
  234. Aftermarket for 4.9?
  235. 4.1 Driveability Problem
  236. Code 44 on '85 Fleetwood Brougham
  237. What's Wrong with My Cadillac?
  238. 4.1/4.5 pros and cons?
  239. Oil leak from under car!
  240. Still having 4.9 idle down problems
  241. 4.9 Vs Northstar
  242. 4.9 emergency..broke something
  243. How hard is it to change the distributor cap and rotor on the 4.9??
  244. HT 4100 Diagnostic Codes
  245. 1989 Eldo help
  246. 4.1 engine timing!! Help...
  247. Engine Swap thoughts!
  248. '85 Fleetwood Brougham 4100
  249. AC won't blow!!!!
  250. Best Oil For HT 4100