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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. Is my 4.9 on the way out?
  2. Installing Reman Ht 4.1 Oil And Coolant Suggestions
  3. What should I do if I put too much bars leak in?
  4. E-030 + Poor Mileage + Bouncing High Idle At Startup
  5. Transmission Looseing fluid , 1 qt per minute
  6. OMG..Maybe it is the water pump. THIS IS ANNOYING.
  7. can the 4.5 handle and 50-75 shot of nitrous
  8. tps................. help!
  9. Took off the belt and its not the waterpump making noise..need help
  10. EGR Malfunction -- Please Help
  11. Waterpump Replacement
  12. Muffler pictures
  13. Throttle position sensor question
  14. advancing the timing question
  15. Vibrating noise around throttle body
  16. 4.9 spark knock
  17. Muffler
  18. Changed coolant without pellets; what to do??
  19. injectors
  20. 94 sedan deville serpentine belt
  21. How hard to replace radiator out of 92 Deville?
  22. Crack in exhaust manifold
  23. Help Plz
  24. Re:Eldo 403FI swap w/MEGASQUIRT ?
  25. Turns out I have a bad water pump.
  26. replacing 4.1 with chevy 5.0
  27. 4.9 leaking oil?
  28. gaskets, paint, parts cleaner
  29. ht 4100 4.1 swap to a 4.9
  30. Questions About Eldorado Country site/info ---403FI swap
  31. 87 DeVille 36k ori. miles
  32. Codes are back!
  33. HP gains from no cat?
  34. 91 deville oxygen sensor(s) location
  35. 1988 deville fuel pump harness question
  36. 1990 SDV tranny- Please help
  37. 88 eldo Special fuel line tool?
  38. Car make caveman brain hurt
  39. Need help with front main bearing!
  40. Surging/cutting out? 1991 Deville 4.9
  41. Gasket to Oil line connector in Radiator.
  42. OH-NO!! The dreaded 4.1 "knocking".
  43. Bbob - Don't flush trans
  44. 94 deville , distrib will be turned the wrong way soon
  45. 93 Caddy seville 4.9
  46. Octane booster/ fuel saver
  47. Rough running (4.1) and ditrib question
  48. engine almost plucked
  49. Replacing Water Pump Too Often
  50. Like illumina said "or that pesky gm module"
  51. to chip or not to chip???
  52. Rebuilding my '88 THM440-T4 ie 4t60
  53. exhaust sound when it rains
  54. Slight Problem, need help
  55. Timming a '85 RWD 4.1...
  56. My mechanic recommended not using bars leak sealant?
  57. quiet, thoaty exhaust
  58. Do you have to set timing after change distributor and cap?
  59. procharger supercharger?
  60. Oil Adapter Hose Fittings
  61. Car won't start; noticed no spark at plug
  62. 90devilleguy, a question about your Muffler!
  63. smog pump replacement 4.5
  64. 83 Eldo Touring 4.1 Engine HELP
  65. 4.9L seville stall/restart problem
  66. Hot starting idling
  67. 4.9 family no hot start issue fix
  68. New to Forum seeking Info in 83 Eldo 4.1 swap and trans
  69. 1990 Cadillac Fleetwood 4.5 FWD
  70. Car cuts Off
  71. another issue (gas guzzler)
  72. part II to my car starting mystery
  73. Trouble codes
  74. car cut off and didn't start until the next day
  75. 1988 Cad SDV motor mounts
  76. 92 STS Engine Stall at low speed...HELP !
  77. Hey aguthmiller I have a few questions
  78. Water in the Oil ... How can it get there?
  79. Will new distributor cap and rotor make car run better?
  80. 94 Deville 4.9 Part Throttle Ping
  81. 92 4.9L Engine Reassembly - my heads are off and engine is in car.
  82. water in oil - Broke down on trip in Coffee Springs Alabama
  83. stuttering problem at idle
  84. 4.5 for 4.1 swap
  85. Got myself an 82 Coupe Deville, having some probs..
  86. 90 sedan deville right blinker acting up
  87. Will top end cleaning be good or bad for an engine with 130K on it??
  88. ALDL location
  89. Best swap for 4.1?
  90. What should I expect for my 0-60
  91. Fuel Pump circuit problem 84 Brougham
  92. 1984 Sedan DeVille over 200,000 miles?
  93. 90 Seville, Code E041
  94. **TH440 - 4.5 FWD - Trans **
  95. 89 4.5 deville overheated
  96. Flowmaster Muffler Installation Pics
  97. 4T60E Leak , ENOUGH IS ENOUGH !!
  98. 90 deville 4.5 125k doggin on freeway
  99. Aftermarket for 4.9?
  100. 4.1 Driveability Problem
  101. Code 44 on '85 Fleetwood Brougham
  102. What's Wrong with My Cadillac?
  103. 4.1/4.5 pros and cons?
  104. Oil leak from under car!
  105. Still having 4.9 idle down problems
  106. 4.9 Vs Northstar
  107. 4.9 emergency..broke something
  108. How hard is it to change the distributor cap and rotor on the 4.9??
  109. HT 4100 Diagnostic Codes
  110. 1989 Eldo help
  111. 4.1 engine timing!! Help...
  112. Engine Swap thoughts!
  113. '85 Fleetwood Brougham 4100
  114. AC won't blow!!!!
  115. Best Oil For HT 4100
  116. how do i enter set timing mode
  117. how to disable traction control on 92 deville?
  118. Muscle car pancake air filter
  119. 4T60 Transaxle or 4T60E what's the diff.
  120. How do I clean the throttle body?
  121. help...change oil soon light on
  122. HT 4100 Engine is it that bad
  123. Tune Ups
  124. Is it hard to find the4 pin plug on tranny?
  125. Woe Is Me!
  126. exhaust venting in cabin
  127. Help with timing advance....
  128. Need Help from Bangkok, Thailand
  129. Quick Timing Question
  130. Voltage out of range(E16), BBOB??
  131. 4.9 muffler for sound
  132. Transmission Fliud Change
  133. More for the Premium 93 vs 89 Debate
  134. Help for83 Fleetwwod
  135. Radiator cooling fan
  136. 4.5 Heads
  137. engine timing in 92 Eldorado
  138. Serious surging.
  139. experiment...MPG...ACTUAL vs. COMPUTER
  140. Service Engine Light Comming on.
  141. Improving Handling
  142. 4.9 cadillac external upgrades
  143. 4.9 deville boring sleeves
  144. So much for putting off the waterpump job
  145. '92 Seville 4.9 questions
  146. 92 ETC:Type of Power Steering Fluid?
  147. 95 Deville No Spark
  148. my cars exhaust sound from inside the car
  149. service sss
  150. lever on seat? 83 eldo
  151. '89 Deville valve cover gasket replacement
  152. car sounds like a lawnmower!!!!
  153. 1992 4.9 with code E46
  154. Where to buy Trans Pan Gasket and Trans Filter w/Gasket
  155. Computer Chip--Shift Kit--Or B&M Shift Plus??
  156. catalytic converter
  157. power steering
  158. 4100 up keep.
  159. z max
  160. transmission modulator
  161. Engine Metal Temperature Switch
  162. F85 error?
  163. Flow Charts?????????????
  164. 90 backfires
  165. Silver and Red V8 PFI engine paint chipping.
  166. 85 fleet fwd trans modulator location?
  167. 1984 , 1985 eldo convertible
  168. Error code 27
  169. 4.1 to 4.9 swap
  170. Searched codes for the first time and I need help.
  171. error E46 where to start?
  172. 1992 Eldorado 4.9l A/C Help...
  173. Error code E31 (93 Deville 4.9L)
  174. 4.9 air filter question...
  175. please help
  176. 88 4.5 Coupe Deville
  177. Rough Idle, stalls and hesitations, but...
  178. Need Help with BarsLeak and Radiator drain!
  179. '92 4.9 operating temp
  180. Engine etc.
  181. Distributor Cap
  182. Car is running rich
  183. 4.1 oil capacity
  184. no heat in cab + overheating
  185. My 88 Sedan Deville, HELP!!!
  186. Removing Alternator On 91 4.9
  187. 4.9 Battery Cables?
  188. Performance Muffler - Ideas?
  189. Should I flush tranny at 52K????
  190. Need Allante Parts - HELP
  191. 251 Belt Problems? Alternator/Fan not working.
  192. 4.1 no start
  193. 4.9:Emission Fail, High HC
  194. Cooling System Pressure Test
  195. 4.9 cam specs.
  196. Requesting 4.5 89' Info
  197. 1988 Eldo fuel tank swap
  198. AC duct rattle
  199. 4.5 running like poop
  200. New Electric "Turbo" not supercharger!
  201. coolant leak in 94 sedan deville (4.9)
  202. a few error codes
  203. She rufuses to be fixed
  204. 4.9 in a 85 fiero with caddy trans
  205. ISC motor acts sticky
  206. egr questions
  207. 88 Coupe deVille backfire
  208. Codes E01-E11, E95?
  209. Self Sticky - 4.9 Engine History and Changes
  210. smog pump adjustment
  211. new to forum
  212. engine missing
  213. 4.9 Idling fast and intermittent service light
  214. Interesting comparison.....
  215. Help! Caddy died and won't start
  216. popping sound when 4.9 is being raced....
  217. performance parts
  218. Injectors & Struts...
  219. 4.5L - 155hp, 180hp, 200hp variants and questions!
  220. power steering pulley
  221. 4.9 better than Northstar?
  222. ht 4100 question
  223. 1990 Deville E98
  224. transmission use
  225. Silent Performance Muffler
  226. Po85
  227. idle speed change?
  228. Cooling Fan Fault?
  229. What to do on a tune up to the 4.9?
  230. Transmission Oil Leak
  231. '90 Deville Speed Sensor.
  232. Nut down the distributor hole
  233. Trans Question 93 4.9 seville
  234. 350 SBC swap pics for DeVillish....
  235. 4.5 engine ticking noise???
  236. 4.5PFI Tune-up tips?
  237. 1990 Fleetwood to a 4.9 or N*
  238. 1985 Fleetwood FWD 4100
  239. tubes in throttle body
  240. Car shuts off after idle for 40 min
  241. ACDelco filter
  242. 1991 Fleetwood 4.9 high speed power loss
  243. Remote oil filter for 4.9 ?
  244. low oil pressure light
  245. 4.9 performance upgrades ?
  246. Premium fuel?
  247. How to find the leaky injector
  248. Cleaning the throttle body on a 4.9
  249. Spark plug removal on a 93 SDV
  250. Fuel Pump on 1990 deville