: HT4100 4.1, 4.5, 4.9



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  1. 4.9 Potential? (Split from "4.9 to a 5.0?")
  2. 94 Deville 4.9 switching complete sending/fuel pumps
  3. 4.9 to a 5.0?
  4. Fan Runs all the time on 4.9, engine runs real cold
  5. AHHH HELP!!! Keep overheating
  6. 4.5 Vs. 4.9
  7. Fuel Mileage vs. Data Center
  8. 92 4.9 flat cam?
  9. Does twitchy tach mean misfire?
  10. ht 4100 Hesitation
  11. 1987 SDV 4.1 L V-8 Available
  12. 89 4.5 TPS installations
  13. 89 Fleetword code (30) ISC Circuit
  14. Boiling coolant, fans not running, ...
  15. no start after warm engine
  16. 1989 4.5 Idle Speed Motor
  17. 1989 Fleetwood Idle Speed Motor
  18. Valve Adjustment 4.9 Engine
  19. remaned 4.1/4.5 short block
  20. 4100 to LT1 swap 83 Coupe Deville
  21. Cylinder head removal
  22. Very poor MPG 1992 Deville ?? HELP!!??!!
  23. turn your 4.9 into a performance engine
  24. engine system fault E046
  25. Take a look at this.
  26. 4.9 exhaust manifold crack, common?
  27. 4.9 changes by year??
  28. 1994 Sedan deville 4.9L Stalls Well Driving Part 2
  29. what did i blow up? pics
  30. Just done the head gasket, think i may have messed it, help.
  31. 4.5 intake manifold on 87 4.1?
  32. 85 eldo ht4100 backfire, miss, stall
  33. Reman. Engine/Trans. What's the best company?
  34. 88 DeVille fan continues to run after I turn it off
  35. New Shell Rotella T with triple protection
  36. error codes
  37. '85 Seville 4.1L engine missing after tune-up.
  38. Help me! What is it?
  39. 93 DeVille Idle Problem
  40. 4.9 coolant flush and fill procedure!
  41. What do I need to know about the HT4100 Engine?
  42. Results of my Emissions Test
  43. Need help 91 Deville
  44. What should engine timing be when not in Timing Mode (25 degree BTDC?)
  45. Question having to do with the 4.9
  46. Simple rotor/distib cap question
  47. HT4100 85 Eldo. Header Issue
  48. Fuel Injector Replacement Tips
  49. clickinggg....
  50. No spark on '90 4.5 Seville
  51. computer accuracy
  52. Do I have to use a new A/C comp. or can I use a reman?
  53. 4.5 intake gasket replacement
  54. Life expectancy for 4.9 and 4T60E
  55. plug stuck in head
  56. Aluminum Heads?
  57. 2002 DeVille DTS maintenance
  58. ignition problems..
  59. Not a new problem
  60. I have a question, someone please explain.
  61. 91 Sedan Deville Gas Mileage ...
  62. 1990 deville hesitates
  63. Great, now I have MORE trouble codes!! E91 and E98
  64. 1994 Sedan deville 4.9L Stalls/dies well driving
  65. PCM Programming for 4.5L V8?
  66. Trouble Code E48 "EGR System Problem"....what exactly is it.
  67. 223-232f
  68. Trying to beat the heat....
  69. STP Fuel Injector Cleaner--it works!
  70. A starting we will go...
  71. 1990 deville 4.5 trouble code air management fault?
  72. 88 deville broke down need help
  73. ? easy way to remove 4.9 @ self serv yard?
  74. Sound like the egr to you guys?
  75. Trouble clearing codes
  76. 4.9 Bearing Thump--Who's Got It?
  77. When to replace O2 sensor?
  78. '92 deVille..surging, stuttering, stalling???
  79. 91 deville fuel injectors......
  80. motor rattle
  81. My car's 'puter done gone got brokeded (92 Eldo 4.9)
  82. 92 deville egr tubes ??
  83. 92' Deville Alternator/power Problem
  84. Changing TPS on 1993 Eldo 4.9
  85. O2S Help Please!
  86. Dead Cylinder - OH NOOOOOO!!!!
  87. A/C Hose Insulation Source
  88. Want your ISC problems solved? Look here...
  89. hmm, how do I get to that A/C compressor clutch?
  90. STOP ENGINE TEMP light problem.
  91. Brake light problem.
  92. Charge Battery Light On (No Codes) !!
  93. A Little help guys, please
  94. Green plug?
  95. How to check timing on an '85 Seville?
  96. No fuel pressure when ignition on, engine off
  97. 90 deville backfiring and running rough?
  98. 4.9 Eldorado Plugs/Wires install question
  99. Accel Wires
  100. Simple question
  101. 87 SDV E30 code
  102. 90 deville misfire
  103. Electrical problem + codes
  104. bad coolant leak: deville 4.5
  105. 1990 fleetwood won't run right - help
  106. 91 Deville 4.9 misses when hot outside
  107. 92 Deville throwing MAP codes, heats up and conks out.
  108. Cooling fans/AC problem
  109. Mufflers Bottom Line?
  110. 1993 Seville w/ 4.9L P041 Code
  111. HT4900 (4.9) Exhaust Manifold Interchangeability
  112. 94 Deville, odd noise and stalling now. Pics attached.
  113. Coolant Leak
  114. bad coolant leak: deville 4.5
  115. hesitation and backfire 4100
  116. 90 Coupe Deville engine problems
  117. 1990 deville hard stall on idle
  118. Cone Filter & Cold Air Intake
  119. Rough runing, missing?
  120. isc/driveability
  121. spudder of some sort
  122. 91 4.9 Runs Rich and Gas Mileage Question
  123. Hey Guys, Long time no chat, and need some input on a non input vss signal. Blew.....
  124. OLDS 350 swap
  125. 1984 eldo some new problems
  126. 4.9 EGR Removal???
  127. Recommended Spark Plugs
  128. 4.9 Running Rough...
  129. problem solved
  130. Changing Oil To Synthetic?
  131. 4.9 performance
  132. 4100 transmission
  133. Coolant System
  134. ECM says my MAT sensor is bad.
  135. Adjusting the timing
  136. PCM codes
  137. Deisel noise around 2000 rpm's
  138. Still having problems on 93 sedandeville
  139. Now im getting worried!
  140. 4100 Flowmaster 80 series VIDEOS
  141. First Car, 4.9 Eldorado. Performance Upgrades HELP? (car-noob)
  142. Cold Air Intake?
  143. 4.1 codes
  144. Helicoil vs Timesert on non N* (4.1, 4.5, 4.9)
  145. Cadillac 4.9 Head Gasket Photos
  146. Where to get Exhaust Manifold Studs
  147. Do your own oil changes.
  148. Ping Ping Go Away!!!
  149. F48
  150. 1985 Seville 4100
  151. Running fuel injector cleaner through your gas tank
  152. Cleaning the throttle body plates!
  153. Post your average MPG
  154. 1984 Throttle body need help, please.
  155. Why is my caddy over heating ?
  156. Poor mpg on 93 sedandeville
  157. Squeeking Noise!
  158. Rwd/fwd Ht4100
  159. TRANS ID'ing
  160. HT4100 Check In
  161. 15W40 delco with GM oil supplement
  162. Performance transmission rebuild...
  163. 4.5 L tranny bolt pattern
  164. isc motor re-learn
  165. 4.9 Extremely rough running issue
  166. Stripped Head Bolt Hole Where Do I Get Helicoil?
  167. engine swap 4100 to 305 chevy
  168. 1984 Cadillac - 4100 firing order and distributor rotation
  169. '92 Eldo Problems
  170. overheating, now power, 83 coupe deville ht4100
  171. Whats the brown stuff on my valves?
  172. Doing My 4.9 Head Gasket Looking for Advice on Parts
  173. ecm replacement
  174. Recommended sealant for water pump gasket on 91 deville
  175. What do i coat the head bolts with?
  176. Bad Map on 91 Deville?
  177. 4.9 or northstar?? which has less problems??
  178. Amsoil test results
  179. 91 Seville Overheat
  180. Are Head Bolts T.t.y Or Not (conflicting Answers)???????
  181. Iron heads
  182. ??? ???E30 isc code??? ???
  183. Got rusty tubes?
  184. Squealing under hood when cold
  185. What is this?????
  186. Noise at EGR conditions
  187. '90 DeVille has high NOX at low speed, failed smog. Some help needed.
  188. exhaust ideas
  189. 1990 fleetwood won't run right - help
  190. 89 deville stumble/miss on acceleration
  191. Diagnostic Mode
  192. Curious Fuel Pump Behavior
  193. Cooling fan fault
  194. High Idle. ISC? Need Advice!!!!
  195. 92 STS Engine Trouble
  196. head gasket, intake gasket or what?
  197. Engine RPM.... is this normal?
  198. 91 Eldorado No Crank B334 code system problem
  199. E67!!!!!! how do i fix
  200. Video of my 4.9 5spd in Action.
  201. broke water pump on my 88!
  202. In search of a new/rebuilt vacuum pump...
  203. Help with the codes please!!
  204. Digital Fuel Injection vs Crossfire Injection
  205. Im Having Problems With My 86 Cadillac
  206. Rust in my cooling system, PLEASE HELP!
  207. 3/8"-ish metal line off of throttle body runs where... ..?
  208. 1990 sedan deville isc crap =(
  209. 5 liter fuel injectors in a 4.9 project!
  210. Cylinder Pressure Test Question???????
  211. Trans Problem?
  212. I need a quick answer
  213. ISC Motor question
  214. Question on use of Rotella 15W-40
  215. 82 HT4100 Hearse Fuel System Codes
  216. Is my EGR valave toast?
  217. just died
  218. Newbie 4100 owner advice
  219. Cleaning under hood - recommendations?
  220. It WON'T slow down...
  221. Spark plugs and spark knock
  222. Where is the control valve assembly for the transmission??
  223. Does the ISC motor affect the tranny shifting/downshifting???
  224. Ethanol in your Caddy....?!
  225. Any Ideas? 93 Deville Stalling
  226. Camshaft position sensor
  227. What's wrong with the tranny?
  228. 1990 Sedan Deville - Any Help is Appreciated
  229. Changing Water Pump on 95 Deville
  230. engine ping
  231. hesitation,back fire and bad Idle 4.9
  232. 4.9 performance exhaust
  233. Any Neat Tricks Replacing Lh Head Gasket???
  234. real cold air intake(no short ram)4.9
  235. Throttle Body 1984 HT4100
  236. 4.9 exploding mufflers
  237. Northstar engine builders in So Cal?
  238. A/C Compressor Only Works at High RPM?
  239. How often do you have to calibrate your TPS?
  240. Its not the fuel pump.
  241. Swapping 4.9 to 4.6N*
  242. 4100 coolant loss #3 cylinder
  243. will 4.5L heads bolt up to a 4.1L
  244. Engine Miss...driving me mad...
  245. Compression ratios?
  246. They see me coming OR So they think
  247. They see me coming OR So they think
  248. exhaust leak
  249. Changing Thermostat on 88 Coupe Deville
  250. HT4100 flooding out badly. Code 15,20,52 ?