: HT4100 4.1, 4.5, 4.9



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