: HT4100 4.1, 4.5, 4.9



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  1. Cleaned out my EGR tubes today, my E.4.8 code is gone!
  2. code help
  3. Low mileage 4.9 Idling Rough Engine Sputters and quits
  4. First time Caddy owner needs some advice please
  5. Trouble with diagnostics
  6. changing oil pump in 90 deville 4.5
  7. Help I dont want to get rid of my car BUT!
  8. Has anyone changed their catalytic converter?
  9. 4.9 Liter idle
  10. Removing hydraulic fittings
  11. How many miles on the 4.9? ?
  12. 88 Sedan Deville not liking the winter
  13. Coolant hose to blower motor
  14. Timing Question
  15. '84 Eldorado blown head gasket?
  16. Oil pan heater?
  17. 4.9 Deville 95 whining noise like supercharger..
  18. Location of the CAM Position Sensor on the 95 4.9L deville?
  19. YES, i did it!!! All went well!
  20. 92 Eldo 4.9 for sale
  21. 4.5 water pump
  22. 93 4.9 STS wont start
  23. DESPERATELY Need Help!!! 85 CDV
  24. Trying to find good price on Allante gear reduction to use on my 4.9
  25. How to clean out EGR valves and throttle body?
  26. time for engine replacement soon-- help!
  27. Heater
  28. Hard starting
  29. 4.5 differences
  30. E98 rectification
  31. 87 fleetwood new ignition problem
  32. 1985 deville 4.1 Injector fuse keeps blowing
  33. PCM override, PS10
  34. EGR solenoid, is it normal?
  35. Get a LARGER capacity, 3 row radiator?
  36. Smoky when at full throttle!
  37. What does the code F.8.5 mean?
  38. 87 fleetwood 4.1 three problems,advice please!
  39. Removed Distributor--Question Before I Restart
  40. Changed the oil pump, lifter still taps on occasion warmed up..
  41. 87 deville, E48, EGR system problem
  42. Additive for newly remaned 86 DeVille Trans??
  43. Is it possible for a 4.9 main bearing thump to get progressively worse?
  44. 1989 Sedandeville issues
  45. 15W-40 Oil .....
  46. Fuel
  47. 82 eldorado alternator bracket
  48. 85 Deville ISC Problem--Might Have the Answer
  49. Help me Please!!!
  50. Weird idea
  51. Engine miss
  52. Pulled a thread
  53. E12 - No Distributor Signal???
  54. computer interchange, '90 Seville?
  55. Where Can I get some chips......
  56. Oil leak source...?
  57. well, i did it but...
  58. HT4100 ECM/BCM Problem?!
  59. #$$%^%@#$% damn .....floods on hot restart
  60. can't flush out "rubber glue type" coolant additive... what to do?
  61. Transmission Shift cable
  62. HT4100 ISC Help
  63. 4t60-E going out
  64. Fuel Issues - Please Help!
  65. 4t60-E FDR and the computer
  66. Fixed my car! Need help on one more thing...
  67. What's wrong with my car? The mystery continues...
  68. When i go to replace the mains....
  69. 4t60-E Shudder?
  70. last year
  71. All 4.x engine service parts are discontinued?
  72. Does anybody have a spare 4.9?
  73. Knock, Knock, Knock, 4.9L
  74. Alright, i'm going in!! I need a few parts and info please.
  75. 90 4.5L Idle Learn Procedure?
  76. I have a slight problem,,, HT4100
  77. Fuel Pressure Test Fitting
  78. 1985 Seville code e15
  79. Cooling Fan Module--Where can I get one?
  80. Bars Leaks Head Gasket Repair
  81. Code E30 on 85 Deville and Vacuum Pumps
  82. Copper Gaskets?
  83. Battery/ALternator area cracking noise?
  84. Oil Analysis: Proof is in the results
  85. 1992 Eldo
  86. That Funky Emissions Tubing
  87. Hey Guys long time no chat, and long time not wanting to start either.
  88. The once a year survival kit for the 4.X series
  89. 4.9 runs rough black exhaust from tail pipe
  90. 1985 Seville harsh shifting tranny
  91. Odd brief buzzing noise from undercarriage
  92. i need a 4t60e guru; i am hating mine
  93. what is up with my car
  94. Early vs. Late 1985 FWD 4100
  95. Strange ISC
  96. 1994 cadillac deville engine knocks when warm
  97. 4.5 --> 4.9
  98. Getting ready for water pump removal
  99. 1988 Eldorado 4.5
  100. 1985 FWD HT4100 Running rough
  101. Question about spark plugs!
  102. TPS problem?
  103. 4100 Mpg
  104. 87 deville 4100 shift problems
  105. 1991 DeVille Speedometer/Transmission Trouble.
  106. Starter solenoid replacement
  107. 4.9 Injector Replacement Questions
  108. 92 STS error code A048 what does that mean?
  109. 1994 Deville 4.9 Idler pulleys
  110. Please Help!!! Rough running 4.9 , Help!!
  111. 1994 Deville 4.9 spark knock
  112. 85 Sedan Deville Stalls after 20 Miles
  113. 4.9 Potential? (Split from "4.9 to a 5.0?")
  114. 94 Deville 4.9 switching complete sending/fuel pumps
  115. 4.9 to a 5.0?
  116. Fan Runs all the time on 4.9, engine runs real cold
  117. AHHH HELP!!! Keep overheating
  118. 4.5 Vs. 4.9
  119. Fuel Mileage vs. Data Center
  120. 92 4.9 flat cam?
  121. Does twitchy tach mean misfire?
  122. ht 4100 Hesitation
  123. 1987 SDV 4.1 L V-8 Available
  124. 89 4.5 TPS installations
  125. 89 Fleetword code (30) ISC Circuit
  126. Boiling coolant, fans not running, ...
  127. no start after warm engine
  128. 1989 4.5 Idle Speed Motor
  129. 1989 Fleetwood Idle Speed Motor
  130. Valve Adjustment 4.9 Engine
  131. remaned 4.1/4.5 short block
  132. 4100 to LT1 swap 83 Coupe Deville
  133. Cylinder head removal
  134. Very poor MPG 1992 Deville ?? HELP!!??!!
  135. turn your 4.9 into a performance engine
  136. engine system fault E046
  137. Take a look at this.
  138. 4.9 exhaust manifold crack, common?
  139. 4.9 changes by year??
  140. 1994 Sedan deville 4.9L Stalls Well Driving Part 2
  141. what did i blow up? pics
  142. Just done the head gasket, think i may have messed it, help.
  143. 4.5 intake manifold on 87 4.1?
  144. 85 eldo ht4100 backfire, miss, stall
  145. Reman. Engine/Trans. What's the best company?
  146. 88 DeVille fan continues to run after I turn it off
  147. New Shell Rotella T with triple protection
  148. error codes
  149. '85 Seville 4.1L engine missing after tune-up.
  150. Help me! What is it?
  151. 93 DeVille Idle Problem
  152. 4.9 coolant flush and fill procedure!
  153. What do I need to know about the HT4100 Engine?
  154. Results of my Emissions Test
  155. Need help 91 Deville
  156. What should engine timing be when not in Timing Mode (25 degree BTDC?)
  157. Question having to do with the 4.9
  158. Simple rotor/distib cap question
  159. HT4100 85 Eldo. Header Issue
  160. Fuel Injector Replacement Tips
  161. clickinggg....
  162. No spark on '90 4.5 Seville
  163. computer accuracy
  164. Do I have to use a new A/C comp. or can I use a reman?
  165. 4.5 intake gasket replacement
  166. Life expectancy for 4.9 and 4T60E
  167. plug stuck in head
  168. Aluminum Heads?
  169. 2002 DeVille DTS maintenance
  170. ignition problems..
  171. Not a new problem
  172. I have a question, someone please explain.
  173. 91 Sedan Deville Gas Mileage ...
  174. 1990 deville hesitates
  175. Great, now I have MORE trouble codes!! E91 and E98
  176. 1994 Sedan deville 4.9L Stalls/dies well driving
  177. PCM Programming for 4.5L V8?
  178. Trouble Code E48 "EGR System Problem"....what exactly is it.
  179. 223-232f
  180. Trying to beat the heat....
  181. STP Fuel Injector Cleaner--it works!
  182. A starting we will go...
  183. 1990 deville 4.5 trouble code air management fault?
  184. 88 deville broke down need help
  185. ? easy way to remove 4.9 @ self serv yard?
  186. Sound like the egr to you guys?
  187. Trouble clearing codes
  188. 4.9 Bearing Thump--Who's Got It?
  189. When to replace O2 sensor?
  190. '92 deVille..surging, stuttering, stalling???
  191. 91 deville fuel injectors......
  192. motor rattle
  193. My car's 'puter done gone got brokeded (92 Eldo 4.9)
  194. 92 deville egr tubes ??
  195. 92' Deville Alternator/power Problem
  196. Changing TPS on 1993 Eldo 4.9
  197. O2S Help Please!
  198. Dead Cylinder - OH NOOOOOO!!!!
  199. A/C Hose Insulation Source
  200. Want your ISC problems solved? Look here...
  201. hmm, how do I get to that A/C compressor clutch?
  202. STOP ENGINE TEMP light problem.
  203. Brake light problem.
  204. Charge Battery Light On (No Codes) !!
  205. A Little help guys, please
  206. Green plug?
  207. How to check timing on an '85 Seville?
  208. No fuel pressure when ignition on, engine off
  209. 90 deville backfiring and running rough?
  210. 4.9 Eldorado Plugs/Wires install question
  211. Accel Wires
  212. Simple question
  213. 87 SDV E30 code
  214. 90 deville misfire
  215. Electrical problem + codes
  216. bad coolant leak: deville 4.5
  217. 1990 fleetwood won't run right - help
  218. 91 Deville 4.9 misses when hot outside
  219. 92 Deville throwing MAP codes, heats up and conks out.
  220. Cooling fans/AC problem
  221. Mufflers Bottom Line?
  222. 1993 Seville w/ 4.9L P041 Code
  223. HT4900 (4.9) Exhaust Manifold Interchangeability
  224. 94 Deville, odd noise and stalling now. Pics attached.
  225. Coolant Leak
  226. bad coolant leak: deville 4.5
  227. hesitation and backfire 4100
  228. 90 Coupe Deville engine problems
  229. 1990 deville hard stall on idle
  230. Cone Filter & Cold Air Intake
  231. Rough runing, missing?
  232. isc/driveability
  233. spudder of some sort
  234. 91 4.9 Runs Rich and Gas Mileage Question
  235. Hey Guys, Long time no chat, and need some input on a non input vss signal. Blew.....
  236. OLDS 350 swap
  237. 1984 eldo some new problems
  238. 4.9 EGR Removal???
  239. Recommended Spark Plugs
  240. 4.9 Running Rough...
  241. problem solved
  242. Changing Oil To Synthetic?
  243. 4.9 performance
  244. 4100 transmission
  245. Coolant System
  246. ECM says my MAT sensor is bad.
  247. Adjusting the timing
  248. PCM codes
  249. Deisel noise around 2000 rpm's
  250. Still having problems on 93 sedandeville