: HT4100 4.1, 4.5, 4.9



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  1. How to remove/replace rattling CAT
  2. pellets and 4.5 engine
  3. ohm reading for injectors on 4.5
  4. ? acceptable ohm resistance for injectors
  5. Intermittent Stalling
  6. 4.5 EGR vs. 4.9 EGR
  7. 4.5 engine
  8. Pushrod?
  9. Got new codes today.
  10. 90 Deville Dies while driving
  11. 84 4.1 Swap To 305/350 ?
  12. new to the forum, need a little help (90 4.5l pfi)
  13. Air Pump Seized (4.1 engine)
  14. OBD I codes for 4.x Engines
  15. junked 4.1 installed chevy 5.0 runs great
  16. I replaced my tps and isc but it stall every now an then
  17. Engine running rough
  18. 85 cadillac seville
  19. '93 4.9L Spark Plugs and Wires
  20. TCC location, please Help!!
  21. White smoke still coming from exhaust?
  22. Starter Disabled "Anti-Theft"
  23. need source for 99 cadillac service manuals
  24. HT4100 coolant issue.
  25. 92 (4.9L) stalling
  26. Cars starting to run a little better!
  27. Oil Overfill Cause Engine Damage?
  28. 4T60E Trans Sport Mode???
  29. can't advance computer beyond PCM?
  30. Turbocharge the 4.9L?
  31. Transmission Wont Shift
  32. discontinued?
  33. Replaced Injectors.. Still no action in Cyls 3 and 4?
  34. Edelbrock engine....
  35. Rough Idle
  36. A/c
  37. Speedometer problems......
  38. 1985 Seville HELP NEEDED
  39. Weird A/C air condition problem
  40. Size of O-rings in fuel line
  41. Fuel Filter Location.
  42. 94 Deville Boils Over after Engine Off
  43. Dexcool in a 4.9L???
  44. 1992 4.9 goes to open loop at HWY speeds.
  45. Bad Engines?
  46. fuel pump location (84 4100)
  47. car wont start (84 4100)
  48. Overhauling and Modifying a 1982 HT4100
  49. 92 deville bad head gasket selling?
  50. 92 deville please help
  51. New 4.9 problem, horrific idle, backfiring
  52. Oil Cooler...
  53. 83 eldorado with new reman engine and tranny timing / ping probs
  54. 4.1 to 4.7
  55. Car giving me fits
  56. 89 Seville idles at 2200
  57. help with codes
  58. 4.5 cranks but no start
  59. 4.9L Stalling out
  60. 'Service Engine Soon' Light on my 4.9 DeVille - Any ideas?
  61. Pistons for a 4.5L and 4.9L the same???
  62. 4.9 distributor help
  63. umm...help please!
  64. 84 coupe deville codes
  65. engine swap
  66. 1990 deville starter replacement
  67. TPS Enhancer
  68. What kind of spark plugs for the HT4100?
  69. Vehicle Data List, Can you spot the problem?
  70. changing belt
  71. 92 Deville - OIL IN COOLANT
  72. 94' sedan deville woes Heeellllllp.
  73. What are the troubleshooting steps for injectors/plugs/wires?
  74. 4.9 Engine Oil Cooler Line replacement
  75. INTERMITTANT "Missing" and rough running/idle
  76. Ppplllleeeeaaassseee Help!!!
  77. ok so maybe its the alternator
  78. engine coolant supplement
  79. Ford SVO Injectors, Can i use them?
  80. '85 Deville Engine Temp Fan Light
  81. If I disconnect the battery.....
  82. 4.9L distributor questions
  83. How to go into different parts of OBD?
  84. gas smell?
  85. 92 Deville Surging during idle!
  86. symptoms of a bad cat?
  87. ebay purchase question?
  88. Flowmaster 80 Series-I LOVE IT!
  89. Over Heating
  90. high throttle on start. Code 26
  91. Fram Air Hog-Test
  92. 4.9L Roller Rockers?
  93. '86 Fleetwood 75 FWD
  94. TPS Adjustment for 85 4.1 (RWD)
  95. where is the thing???!!!!!!????
  96. radiator removal and installation
  97. 92 deville "set timing mode"????
  98. Ahh!!!
  99. What to do to make car stop running rich?
  100. 92 deville clicking after shut off???
  101. Spark Knock, Continued....
  102. Throttle Body and Air CLeaner Housing
  103. Engine Dies...
  104. Quick PCV question
  105. reman Ht 4100 is in looking for reman tranny advice, sources, install, fluid etc.
  106. bogging 4.9 in a Fiero
  107. Hi - 89 Deville 4.5 Liter V8 in 84 Pontiac Fiero
  108. Overheat Problem
  109. '89 DeVille, ISP motor bounces
  110. How to tell if water pump is going out?
  111. Overheating Badly
  112. MAT Sensor location...
  113. Serpentine belt for 4.9 ('91 Deville)?
  114. sputtering
  115. Radiator leak
  116. 15 Amp ERLS blowing
  117. 94 deville fuel delivery prob. HELP!
  118. wtf
  119. loud tapping noise in the left bank sounds like from top end
  120. swap engine
  121. eric
  122. replacing a broke pulley
  123. Jrb
  124. 87 eldorado 4.1L in an 84 fiero - SES light ON
  125. so many codes!
  126. 91 Deville 4.9 with no power- Need Help
  127. 0.07 volts for ground???
  128. 87 Eldorado 4.1L
  129. type of oil
  130. ISC motor idle speed
  131. how do i remove the throttle body?
  132. got my 4.1 reman in but it wont fire up
  133. High RPM on Motor Start - 4.9
  134. 4.5 V8 Water in Oil
  135. 88 4.5 V8 Water In Oil
  136. Aftermarket 4100 Parts?
  137. coolant leak from timing cover?
  138. Hammer -vs- Fussy Starter
  139. bad thermostats, hopefully?
  140. 4.1 TPS sensor
  141. Strange engine/ecu problem
  142. Best motor oil for 4.9?
  143. 4.5 Coolant Problems, Leaking Fluid - but from where?
  144. simple 4.9 questions
  145. 4.9L Firing order + Cylinder location HERE!
  146. 4.1 Rough Idle
  147. Best (Worst) Air Filters to Use
  148. 4.9L performance upgrades?
  149. 4.1 to 4.5 swap
  150. How much for New Head Gaskets?
  151. new mat and coolent sensors
  152. rough idle and sputtering
  153. 4.1 exhaust manifold
  154. 4.9 Head Gasket
  155. problem with "service engine soon"
  156. Advance timing on 4.9
  157. What MPG for 87 Eldorado, 4.1?
  158. E048 EGR fault code how to fix?
  159. 4.9 And The Gas Mileage Sucks!!!
  160. Any way to disable the ses light?
  161. 95 deville tranny question
  162. 92' dies then restarts by its self
  163. ECM pinouts
  164. Dead 89 deville engine
  165. Going to be a long weekend
  166. A few questions for the Caddy Experts 4.9L
  167. old radiator cap problematic?
  168. 4.9 ltr
  169. 4.9 reliability :P
  170. Help With Code
  171. confused
  172. 4.9 Ltr Timing Belt?
  173. Drive ADL switch?
  174. spark plug question
  175. code ro15
  176. 92 Fleetwood 4.9 hesitation/code help
  177. 4.5 no start, no life. sorta familiar
  178. Yea another code ??
  179. 4.1 Operating Temperatures
  180. coolant leak
  181. A few questions regarding the 4.9
  182. code questions please...
  183. Throttle body bolt stripped out of intake manifold
  184. steering wheel will lock up and car cut off
  185. Help with 89 Sedan deVille codes...
  186. how good are the bottom ends on the 4.9?
  187. E98 code - help!!??
  188. 4.9L northstar
  189. Need help ... engine kicks, accelerates/revs itself
  190. '89 DeVille a/c not working
  191. HT4100 Stalling
  192. 4.9 oil consumption
  193. ht 4100 change over to 350 chevy
  194. Will 4.9 heads fit on a 4.1 block?
  195. Thinking about getting a new coil
  196. 87 Cadillac Seville ,4.1 with blown head gasket
  197. Hi. I need lots of help concerning the 4.9L. Thanks.
  198. timing a 4.5
  199. pulley bearing? serpentine belt not moving
  200. Hub on crankshaft
  201. Tackling Motor mount Replacement-92 Seville(4.9)
  202. 1. Diag Codes 2. Engine Stall
  203. squeek squeek .my speedo cable i think
  204. coolant in oil in my new motor
  205. coolant in oil
  206. Reconnecting Spark Plug Wires - 4.9L
  207. rough poor idle on 91 Seville STS 4.9 ideas?
  208. bbob???
  209. Better MPG with 87 Octane
  210. Preliminary tune-up
  211. car from hell
  212. 1988 Coupe Deville 4.5 ECM problem
  213. Please Help!!!
  214. Well, it cranked but...
  215. 4.9 heads on a 4.5
  216. 1990 fleetwood 4.5 fuel filter and thermostat location????
  217. 4.1 V6 and 4.1 V8
  218. Does the bars leak that comes in the gray bottle do the same thing as the tablets?
  219. 93 SDV trans question
  220. can anyone shine some light on me
  221. What's wrong with my 4100?
  222. What are some tricks to make the 4100 last a long time?
  223. hurt caddy
  224. torque specs for belt tensioner pulley
  225. Need trouble codes for '83 HT-4100 Eldo
  226. 93 loud knocking within engine, while in park
  227. ht4100
  228. I bought my muffler
  229. Valve belts?
  230. gas leak
  231. Just got 3 codes, need some help!
  232. Needing help with a few things....
  233. How can I reset codes on '83 Eldo
  234. 4.9 motor buildup pics...
  235. oil light flickers at idle
  236. 83 coupe deville 4100???
  237. 1987 Fleetwood problems, maybe you guys know or been through it?
  238. how do i...
  239. Cracked Manifold
  240. Bad mpg and very throaty problem
  241. Weird ~ I like the 87 4100 growl
  242. How to check codes for A/C unit?
  243. 3 fan fault message in my 88 seville help?
  244. Fuel injector service
  245. starting
  246. flywheel to torque converter bolts
  247. Harmonic balancer 83 Fwd In-Line 4.1
  248. 4100 with 92K
  249. Newbie needs tranny and code help
  250. Deville still will not start...