: HT4100 4.1, 4.5, 4.9



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