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View Full Version : HT4100 4.1, 4.5, 4.9

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  1. Transmission Wont Shift
  2. discontinued?
  3. Replaced Injectors.. Still no action in Cyls 3 and 4?
  4. Edelbrock engine....
  5. Rough Idle
  6. A/c
  7. Speedometer problems......
  8. 1985 Seville HELP NEEDED
  9. Weird A/C air condition problem
  10. Size of O-rings in fuel line
  11. Fuel Filter Location.
  12. 94 Deville Boils Over after Engine Off
  13. Dexcool in a 4.9L???
  14. 1992 4.9 goes to open loop at HWY speeds.
  15. Bad Engines?
  16. fuel pump location (84 4100)
  17. car wont start (84 4100)
  18. Overhauling and Modifying a 1982 HT4100
  19. 92 deville bad head gasket selling?
  20. 92 deville please help
  21. New 4.9 problem, horrific idle, backfiring
  22. Oil Cooler...
  23. 83 eldorado with new reman engine and tranny timing / ping probs
  24. 4.1 to 4.7
  25. Car giving me fits
  26. 89 Seville idles at 2200
  27. help with codes
  28. 4.5 cranks but no start
  29. 4.9L Stalling out
  30. 'Service Engine Soon' Light on my 4.9 DeVille - Any ideas?
  31. Pistons for a 4.5L and 4.9L the same???
  32. 4.9 distributor help
  33. umm...help please!
  34. 84 coupe deville codes
  35. engine swap
  36. 1990 deville starter replacement
  37. TPS Enhancer
  38. What kind of spark plugs for the HT4100?
  39. Vehicle Data List, Can you spot the problem?
  40. changing belt
  41. 92 Deville - OIL IN COOLANT
  42. 94' sedan deville woes Heeellllllp.
  43. What are the troubleshooting steps for injectors/plugs/wires?
  44. 4.9 Engine Oil Cooler Line replacement
  45. INTERMITTANT "Missing" and rough running/idle
  46. Ppplllleeeeaaassseee Help!!!
  47. ok so maybe its the alternator
  48. engine coolant supplement
  49. Ford SVO Injectors, Can i use them?
  50. '85 Deville Engine Temp Fan Light
  51. If I disconnect the battery.....
  52. 4.9L distributor questions
  53. How to go into different parts of OBD?
  54. gas smell?
  55. 92 Deville Surging during idle!
  56. symptoms of a bad cat?
  57. ebay purchase question?
  58. Flowmaster 80 Series-I LOVE IT!
  59. Over Heating
  60. high throttle on start. Code 26
  61. Fram Air Hog-Test
  62. 4.9L Roller Rockers?
  63. '86 Fleetwood 75 FWD
  64. TPS Adjustment for 85 4.1 (RWD)
  65. where is the thing???!!!!!!????
  66. radiator removal and installation
  67. 92 deville "set timing mode"????
  68. Ahh!!!
  69. What to do to make car stop running rich?
  70. 92 deville clicking after shut off???
  71. Spark Knock, Continued....
  72. Throttle Body and Air CLeaner Housing
  73. Engine Dies...
  74. Quick PCV question
  75. reman Ht 4100 is in looking for reman tranny advice, sources, install, fluid etc.
  76. bogging 4.9 in a Fiero
  77. Hi - 89 Deville 4.5 Liter V8 in 84 Pontiac Fiero
  78. Overheat Problem
  79. '89 DeVille, ISP motor bounces
  80. How to tell if water pump is going out?
  81. Overheating Badly
  82. MAT Sensor location...
  83. Serpentine belt for 4.9 ('91 Deville)?
  84. sputtering
  85. Radiator leak
  86. 15 Amp ERLS blowing
  87. 94 deville fuel delivery prob. HELP!
  88. wtf
  89. loud tapping noise in the left bank sounds like from top end
  90. swap engine
  91. eric
  92. replacing a broke pulley
  93. Jrb
  94. 87 eldorado 4.1L in an 84 fiero - SES light ON
  95. so many codes!
  96. 91 Deville 4.9 with no power- Need Help
  97. 0.07 volts for ground???
  98. 87 Eldorado 4.1L
  99. type of oil
  100. ISC motor idle speed
  101. how do i remove the throttle body?
  102. got my 4.1 reman in but it wont fire up
  103. High RPM on Motor Start - 4.9
  104. 4.5 V8 Water in Oil
  105. 88 4.5 V8 Water In Oil
  106. Aftermarket 4100 Parts?
  107. coolant leak from timing cover?
  108. Hammer -vs- Fussy Starter
  109. bad thermostats, hopefully?
  110. 4.1 TPS sensor
  111. Strange engine/ecu problem
  112. Best motor oil for 4.9?
  113. 4.5 Coolant Problems, Leaking Fluid - but from where?
  114. simple 4.9 questions
  115. 4.9L Firing order + Cylinder location HERE!
  116. 4.1 Rough Idle
  117. Best (Worst) Air Filters to Use
  118. 4.9L performance upgrades?
  119. 4.1 to 4.5 swap
  120. How much for New Head Gaskets?
  121. new mat and coolent sensors
  122. rough idle and sputtering
  123. 4.1 exhaust manifold
  124. 4.9 Head Gasket
  125. problem with "service engine soon"
  126. Advance timing on 4.9
  127. What MPG for 87 Eldorado, 4.1?
  128. E048 EGR fault code how to fix?
  129. 4.9 And The Gas Mileage Sucks!!!
  130. Any way to disable the ses light?
  131. 95 deville tranny question
  132. 92' dies then restarts by its self
  133. ECM pinouts
  134. Dead 89 deville engine
  135. Going to be a long weekend
  136. A few questions for the Caddy Experts 4.9L
  137. old radiator cap problematic?
  138. 4.9 ltr
  139. 4.9 reliability :P
  140. Help With Code
  141. confused
  142. 4.9 Ltr Timing Belt?
  143. Drive ADL switch?
  144. spark plug question
  145. code ro15
  146. 92 Fleetwood 4.9 hesitation/code help
  147. 4.5 no start, no life. sorta familiar
  148. Yea another code ??
  149. 4.1 Operating Temperatures
  150. coolant leak
  151. A few questions regarding the 4.9
  152. code questions please...
  153. Throttle body bolt stripped out of intake manifold
  154. steering wheel will lock up and car cut off
  155. Help with 89 Sedan deVille codes...
  156. how good are the bottom ends on the 4.9?
  157. E98 code - help!!??
  158. 4.9L northstar
  159. Need help ... engine kicks, accelerates/revs itself
  160. '89 DeVille a/c not working
  161. HT4100 Stalling
  162. 4.9 oil consumption
  163. ht 4100 change over to 350 chevy
  164. Will 4.9 heads fit on a 4.1 block?
  165. Thinking about getting a new coil
  166. 87 Cadillac Seville ,4.1 with blown head gasket
  167. Hi. I need lots of help concerning the 4.9L. Thanks.
  168. timing a 4.5
  169. pulley bearing? serpentine belt not moving
  170. Hub on crankshaft
  171. Tackling Motor mount Replacement-92 Seville(4.9)
  172. 1. Diag Codes 2. Engine Stall
  173. squeek squeek .my speedo cable i think
  174. coolant in oil in my new motor
  175. coolant in oil
  176. Reconnecting Spark Plug Wires - 4.9L
  177. rough poor idle on 91 Seville STS 4.9 ideas?
  178. bbob???
  179. Better MPG with 87 Octane
  180. Preliminary tune-up
  181. car from hell
  182. 1988 Coupe Deville 4.5 ECM problem
  183. Please Help!!!
  184. Well, it cranked but...
  185. 4.9 heads on a 4.5
  186. 1990 fleetwood 4.5 fuel filter and thermostat location????
  187. 4.1 V6 and 4.1 V8
  188. Does the bars leak that comes in the gray bottle do the same thing as the tablets?
  189. 93 SDV trans question
  190. can anyone shine some light on me
  191. What's wrong with my 4100?
  192. What are some tricks to make the 4100 last a long time?
  193. hurt caddy
  194. torque specs for belt tensioner pulley
  195. Need trouble codes for '83 HT-4100 Eldo
  196. 93 loud knocking within engine, while in park
  197. ht4100
  198. I bought my muffler
  199. Valve belts?
  200. gas leak
  201. Just got 3 codes, need some help!
  202. Needing help with a few things....
  203. How can I reset codes on '83 Eldo
  204. 4.9 motor buildup pics...
  205. oil light flickers at idle
  206. 83 coupe deville 4100???
  207. 1987 Fleetwood problems, maybe you guys know or been through it?
  208. how do i...
  209. Cracked Manifold
  210. Bad mpg and very throaty problem
  211. Weird ~ I like the 87 4100 growl
  212. How to check codes for A/C unit?
  213. 3 fan fault message in my 88 seville help?
  214. Fuel injector service
  215. starting
  216. flywheel to torque converter bolts
  217. Harmonic balancer 83 Fwd In-Line 4.1
  218. 4100 with 92K
  219. Newbie needs tranny and code help
  220. Deville still will not start...
  221. knocking solved
  222. Almost ready to pull the ht4100
  223. no fuel
  224. Safety Safety Safety !
  225. A Little Different No Start Problem
  226. 95 Deville Wont Start...Boo
  227. 4.9 being weird help!!!
  228. A/C help?????
  229. E67 error, any ideas?
  230. Water in door!
  231. Air Conditioning
  232. A/C Question for '92 STS
  233. ITS DONE....I finally have a smooth QUIET Cadillac
  234. ht4100 mounting to engine stand bolt size?
  235. '94 4.9 won't start!
  236. 1988 Alante will not run
  237. Swap Question 4100 (electronics)
  238. Let me tell you, water pump replacement is a pain in the @$$.
  239. 4T60E slipping
  240. Proper Engine Break In Reman 4.1
  241. Cadillac Coral?
  242. 4.1 Biarritz hesitation and stalling - long with lots of info!
  243. Marked surge at light throttle
  244. 4.1 Saddened
  245. 95 deville 4.9 miss at idle
  246. newbie
  247. Repeated O2 Sensor Problem 91 4.9l
  248. Bars Golden Seal Powder Stop Leak And Other Stuff (Deals?)
  249. Need second opinion 4.1 swap to northstar
  250. gonna replace the 4100 on 83 cadillac deville would it be possible to put a chevy 350