: HT4100 4.1, 4.5, 4.9



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  1. Boiling coolant, fans not running, ...
  2. no start after warm engine
  3. 1989 4.5 Idle Speed Motor
  4. 1989 Fleetwood Idle Speed Motor
  5. Valve Adjustment 4.9 Engine
  6. remaned 4.1/4.5 short block
  7. 4100 to LT1 swap 83 Coupe Deville
  8. Cylinder head removal
  9. Very poor MPG 1992 Deville ?? HELP!!??!!
  10. turn your 4.9 into a performance engine
  11. engine system fault E046
  12. Take a look at this.
  13. 4.9 exhaust manifold crack, common?
  14. 4.9 changes by year??
  15. 1994 Sedan deville 4.9L Stalls Well Driving Part 2
  16. what did i blow up? pics
  17. Just done the head gasket, think i may have messed it, help.
  18. 4.5 intake manifold on 87 4.1?
  19. 85 eldo ht4100 backfire, miss, stall
  20. Reman. Engine/Trans. What's the best company?
  21. 88 DeVille fan continues to run after I turn it off
  22. New Shell Rotella T with triple protection
  23. error codes
  24. '85 Seville 4.1L engine missing after tune-up.
  25. Help me! What is it?
  26. 93 DeVille Idle Problem
  27. 4.9 coolant flush and fill procedure!
  28. What do I need to know about the HT4100 Engine?
  29. Results of my Emissions Test
  30. Need help 91 Deville
  31. What should engine timing be when not in Timing Mode (25 degree BTDC?)
  32. Question having to do with the 4.9
  33. Simple rotor/distib cap question
  34. HT4100 85 Eldo. Header Issue
  35. Fuel Injector Replacement Tips
  36. clickinggg....
  37. No spark on '90 4.5 Seville
  38. computer accuracy
  39. Do I have to use a new A/C comp. or can I use a reman?
  40. 4.5 intake gasket replacement
  41. Life expectancy for 4.9 and 4T60E
  42. plug stuck in head
  43. Aluminum Heads?
  44. 2002 DeVille DTS maintenance
  45. ignition problems..
  46. Not a new problem
  47. I have a question, someone please explain.
  48. 91 Sedan Deville Gas Mileage ...
  49. 1990 deville hesitates
  50. Great, now I have MORE trouble codes!! E91 and E98
  51. 1994 Sedan deville 4.9L Stalls/dies well driving
  52. PCM Programming for 4.5L V8?
  53. Trouble Code E48 "EGR System Problem"....what exactly is it.
  54. 223-232f
  55. Trying to beat the heat....
  56. STP Fuel Injector Cleaner--it works!
  57. A starting we will go...
  58. 1990 deville 4.5 trouble code air management fault?
  59. 88 deville broke down need help
  60. ? easy way to remove 4.9 @ self serv yard?
  61. Sound like the egr to you guys?
  62. Trouble clearing codes
  63. 4.9 Bearing Thump--Who's Got It?
  64. When to replace O2 sensor?
  65. '92 deVille..surging, stuttering, stalling???
  66. 91 deville fuel injectors......
  67. motor rattle
  68. My car's 'puter done gone got brokeded (92 Eldo 4.9)
  69. 92 deville egr tubes ??
  70. 92' Deville Alternator/power Problem
  71. Changing TPS on 1993 Eldo 4.9
  72. O2S Help Please!
  73. Dead Cylinder - OH NOOOOOO!!!!
  74. A/C Hose Insulation Source
  75. Want your ISC problems solved? Look here...
  76. hmm, how do I get to that A/C compressor clutch?
  77. STOP ENGINE TEMP light problem.
  78. Brake light problem.
  79. Charge Battery Light On (No Codes) !!
  80. A Little help guys, please
  81. Green plug?
  82. How to check timing on an '85 Seville?
  83. No fuel pressure when ignition on, engine off
  84. 90 deville backfiring and running rough?
  85. 4.9 Eldorado Plugs/Wires install question
  86. Accel Wires
  87. Simple question
  88. 87 SDV E30 code
  89. 90 deville misfire
  90. Electrical problem + codes
  91. bad coolant leak: deville 4.5
  92. 1990 fleetwood won't run right - help
  93. 91 Deville 4.9 misses when hot outside
  94. 92 Deville throwing MAP codes, heats up and conks out.
  95. Cooling fans/AC problem
  96. Mufflers Bottom Line?
  97. 1993 Seville w/ 4.9L P041 Code
  98. HT4900 (4.9) Exhaust Manifold Interchangeability
  99. 94 Deville, odd noise and stalling now. Pics attached.
  100. Coolant Leak
  101. bad coolant leak: deville 4.5
  102. hesitation and backfire 4100
  103. 90 Coupe Deville engine problems
  104. 1990 deville hard stall on idle
  105. Cone Filter & Cold Air Intake
  106. Rough runing, missing?
  107. isc/driveability
  108. spudder of some sort
  109. 91 4.9 Runs Rich and Gas Mileage Question
  110. Hey Guys, Long time no chat, and need some input on a non input vss signal. Blew.....
  111. OLDS 350 swap
  112. 1984 eldo some new problems
  113. 4.9 EGR Removal???
  114. Recommended Spark Plugs
  115. 4.9 Running Rough...
  116. problem solved
  117. Changing Oil To Synthetic?
  118. 4.9 performance
  119. 4100 transmission
  120. Coolant System
  121. ECM says my MAT sensor is bad.
  122. Adjusting the timing
  123. PCM codes
  124. Deisel noise around 2000 rpm's
  125. Still having problems on 93 sedandeville
  126. Now im getting worried!
  127. 4100 Flowmaster 80 series VIDEOS
  128. First Car, 4.9 Eldorado. Performance Upgrades HELP? (car-noob)
  129. Cold Air Intake?
  130. 4.1 codes
  131. Helicoil vs Timesert on non N* (4.1, 4.5, 4.9)
  132. Cadillac 4.9 Head Gasket Photos
  133. Where to get Exhaust Manifold Studs
  134. Do your own oil changes.
  135. Ping Ping Go Away!!!
  136. F48
  137. 1985 Seville 4100
  138. Running fuel injector cleaner through your gas tank
  139. Cleaning the throttle body plates!
  140. Post your average MPG
  141. 1984 Throttle body need help, please.
  142. Why is my caddy over heating ?
  143. Poor mpg on 93 sedandeville
  144. Squeeking Noise!
  145. Rwd/fwd Ht4100
  146. TRANS ID'ing
  147. HT4100 Check In
  148. 15W40 delco with GM oil supplement
  149. Performance transmission rebuild...
  150. 4.5 L tranny bolt pattern
  151. isc motor re-learn
  152. 4.9 Extremely rough running issue
  153. Stripped Head Bolt Hole Where Do I Get Helicoil?
  154. engine swap 4100 to 305 chevy
  155. 1984 Cadillac - 4100 firing order and distributor rotation
  156. '92 Eldo Problems
  157. overheating, now power, 83 coupe deville ht4100
  158. Whats the brown stuff on my valves?
  159. Doing My 4.9 Head Gasket Looking for Advice on Parts
  160. ecm replacement
  161. Recommended sealant for water pump gasket on 91 deville
  162. What do i coat the head bolts with?
  163. Bad Map on 91 Deville?
  164. 4.9 or northstar?? which has less problems??
  165. Amsoil test results
  166. 91 Seville Overheat
  167. Are Head Bolts T.t.y Or Not (conflicting Answers)???????
  168. Iron heads
  169. ??? ???E30 isc code??? ???
  170. Got rusty tubes?
  171. Squealing under hood when cold
  172. What is this?????
  173. Noise at EGR conditions
  174. '90 DeVille has high NOX at low speed, failed smog. Some help needed.
  175. exhaust ideas
  176. 1990 fleetwood won't run right - help
  177. 89 deville stumble/miss on acceleration
  178. Diagnostic Mode
  179. Curious Fuel Pump Behavior
  180. Cooling fan fault
  181. High Idle. ISC? Need Advice!!!!
  182. 92 STS Engine Trouble
  183. head gasket, intake gasket or what?
  184. Engine RPM.... is this normal?
  185. 91 Eldorado No Crank B334 code system problem
  186. E67!!!!!! how do i fix
  187. Video of my 4.9 5spd in Action.
  188. broke water pump on my 88!
  189. In search of a new/rebuilt vacuum pump...
  190. Help with the codes please!!
  191. Digital Fuel Injection vs Crossfire Injection
  192. Im Having Problems With My 86 Cadillac
  193. Rust in my cooling system, PLEASE HELP!
  194. 3/8"-ish metal line off of throttle body runs where... ..?
  195. 1990 sedan deville isc crap =(
  196. 5 liter fuel injectors in a 4.9 project!
  197. Cylinder Pressure Test Question???????
  198. Trans Problem?
  199. I need a quick answer
  200. ISC Motor question
  201. Question on use of Rotella 15W-40
  202. 82 HT4100 Hearse Fuel System Codes
  203. Is my EGR valave toast?
  204. just died
  205. Newbie 4100 owner advice
  206. Cleaning under hood - recommendations?
  207. It WON'T slow down...
  208. Spark plugs and spark knock
  209. Where is the control valve assembly for the transmission??
  210. Does the ISC motor affect the tranny shifting/downshifting???
  211. Ethanol in your Caddy....?!
  212. Any Ideas? 93 Deville Stalling
  213. Camshaft position sensor
  214. What's wrong with the tranny?
  215. 1990 Sedan Deville - Any Help is Appreciated
  216. Changing Water Pump on 95 Deville
  217. engine ping
  218. hesitation,back fire and bad Idle 4.9
  219. 4.9 performance exhaust
  220. Any Neat Tricks Replacing Lh Head Gasket???
  221. real cold air intake(no short ram)4.9
  222. Throttle Body 1984 HT4100
  223. 4.9 exploding mufflers
  224. Northstar engine builders in So Cal?
  225. A/C Compressor Only Works at High RPM?
  226. How often do you have to calibrate your TPS?
  227. Its not the fuel pump.
  228. Swapping 4.9 to 4.6N*
  229. 4100 coolant loss #3 cylinder
  230. will 4.5L heads bolt up to a 4.1L
  231. Engine Miss...driving me mad...
  232. Compression ratios?
  233. They see me coming OR So they think
  234. They see me coming OR So they think
  235. exhaust leak
  236. Changing Thermostat on 88 Coupe Deville
  237. HT4100 flooding out badly. Code 15,20,52 ?
  238. GM Top Engine Cleaner
  239. Coolant temp gets up around 230 some times
  240. Toasted fuel pump?
  241. What is that tube for?
  242. Finally bought some things for the car !
  243. 4.9L What the Hell is this? ...
  244. Is this converter alright?
  245. Professional injector cleaning?
  246. Is my fuel pressure low???? 93 Deville
  247. E62 Cruise control vacum solenoid error code
  248. I am going to make a cut out
  249. Problem adding a cutout to '90 Seville exhaust system,
  250. Flawed logic or a..