: HT4100 4.1, 4.5, 4.9



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  1. ECM says my MAT sensor is bad.
  2. Adjusting the timing
  3. PCM codes
  4. Deisel noise around 2000 rpm's
  5. Still having problems on 93 sedandeville
  6. Now im getting worried!
  7. 4100 Flowmaster 80 series VIDEOS
  8. First Car, 4.9 Eldorado. Performance Upgrades HELP? (car-noob)
  9. Cold Air Intake?
  10. 4.1 codes
  11. Helicoil vs Timesert on non N* (4.1, 4.5, 4.9)
  12. Cadillac 4.9 Head Gasket Photos
  13. Where to get Exhaust Manifold Studs
  14. Do your own oil changes.
  15. Ping Ping Go Away!!!
  16. F48
  17. 1985 Seville 4100
  18. Running fuel injector cleaner through your gas tank
  19. Cleaning the throttle body plates!
  20. Post your average MPG
  21. 1984 Throttle body need help, please.
  22. Why is my caddy over heating ?
  23. Poor mpg on 93 sedandeville
  24. Squeeking Noise!
  25. Rwd/fwd Ht4100
  26. TRANS ID'ing
  27. HT4100 Check In
  28. 15W40 delco with GM oil supplement
  29. Performance transmission rebuild...
  30. 4.5 L tranny bolt pattern
  31. isc motor re-learn
  32. 4.9 Extremely rough running issue
  33. Stripped Head Bolt Hole Where Do I Get Helicoil?
  34. engine swap 4100 to 305 chevy
  35. 1984 Cadillac - 4100 firing order and distributor rotation
  36. '92 Eldo Problems
  37. overheating, now power, 83 coupe deville ht4100
  38. Whats the brown stuff on my valves?
  39. Doing My 4.9 Head Gasket Looking for Advice on Parts
  40. ecm replacement
  41. Recommended sealant for water pump gasket on 91 deville
  42. What do i coat the head bolts with?
  43. Bad Map on 91 Deville?
  44. 4.9 or northstar?? which has less problems??
  45. Amsoil test results
  46. 91 Seville Overheat
  47. Are Head Bolts T.t.y Or Not (conflicting Answers)???????
  48. Iron heads
  49. ??? ???E30 isc code??? ???
  50. Got rusty tubes?
  51. Squealing under hood when cold
  52. What is this?????
  53. Noise at EGR conditions
  54. '90 DeVille has high NOX at low speed, failed smog. Some help needed.
  55. exhaust ideas
  56. 1990 fleetwood won't run right - help
  57. 89 deville stumble/miss on acceleration
  58. Diagnostic Mode
  59. Curious Fuel Pump Behavior
  60. Cooling fan fault
  61. High Idle. ISC? Need Advice!!!!
  62. 92 STS Engine Trouble
  63. head gasket, intake gasket or what?
  64. Engine RPM.... is this normal?
  65. 91 Eldorado No Crank B334 code system problem
  66. E67!!!!!! how do i fix
  67. Video of my 4.9 5spd in Action.
  68. broke water pump on my 88!
  69. In search of a new/rebuilt vacuum pump...
  70. Help with the codes please!!
  71. Digital Fuel Injection vs Crossfire Injection
  72. Im Having Problems With My 86 Cadillac
  73. Rust in my cooling system, PLEASE HELP!
  74. 3/8"-ish metal line off of throttle body runs where... ..?
  75. 1990 sedan deville isc crap =(
  76. 5 liter fuel injectors in a 4.9 project!
  77. Cylinder Pressure Test Question???????
  78. Trans Problem?
  79. I need a quick answer
  80. ISC Motor question
  81. Question on use of Rotella 15W-40
  82. 82 HT4100 Hearse Fuel System Codes
  83. Is my EGR valave toast?
  84. just died
  85. Newbie 4100 owner advice
  86. Cleaning under hood - recommendations?
  87. It WON'T slow down...
  88. Spark plugs and spark knock
  89. Where is the control valve assembly for the transmission??
  90. Does the ISC motor affect the tranny shifting/downshifting???
  91. Ethanol in your Caddy....?!
  92. Any Ideas? 93 Deville Stalling
  93. Camshaft position sensor
  94. What's wrong with the tranny?
  95. 1990 Sedan Deville - Any Help is Appreciated
  96. Changing Water Pump on 95 Deville
  97. engine ping
  98. hesitation,back fire and bad Idle 4.9
  99. 4.9 performance exhaust
  100. Any Neat Tricks Replacing Lh Head Gasket???
  101. real cold air intake(no short ram)4.9
  102. Throttle Body 1984 HT4100
  103. 4.9 exploding mufflers
  104. Northstar engine builders in So Cal?
  105. A/C Compressor Only Works at High RPM?
  106. How often do you have to calibrate your TPS?
  107. Its not the fuel pump.
  108. Swapping 4.9 to 4.6N*
  109. 4100 coolant loss #3 cylinder
  110. will 4.5L heads bolt up to a 4.1L
  111. Engine Miss...driving me mad...
  112. Compression ratios?
  113. They see me coming OR So they think
  114. They see me coming OR So they think
  115. exhaust leak
  116. Changing Thermostat on 88 Coupe Deville
  117. HT4100 flooding out badly. Code 15,20,52 ?
  118. GM Top Engine Cleaner
  119. Coolant temp gets up around 230 some times
  120. Toasted fuel pump?
  121. What is that tube for?
  122. Finally bought some things for the car !
  123. 4.9L What the Hell is this? ...
  124. Is this converter alright?
  125. Professional injector cleaning?
  126. Is my fuel pressure low???? 93 Deville
  127. E62 Cruise control vacum solenoid error code
  128. I am going to make a cut out
  129. Problem adding a cutout to '90 Seville exhaust system,
  130. Flawed logic or a..
  131. transmission bolt up from 4.5L to 4.1L HT4100
  132. Does Anyone Have A Step By Step Guide To Adjusting The Tps?
  133. All Show And No Go
  134. Coolant issues must be contagious
  135. Coolant gushed out on highway, engine rattles
  136. Yet another exhaust theory question.
  137. 4.5 sounds real good with no cat
  138. Oil Pan Drain Plug Spins
  139. 87 Seville...Engine problems, knocking, overheating,do I shoot it?
  140. Can I use a regular fuel filter?
  141. Where is the fuel filter?
  142. RWD tranny for 4.9L??
  143. please help!!!!!!!
  144. Did I go overboard?
  145. Fuel: Maladies, Mayhem...Mileage!
  146. Errr... Map/Baro code. No clue what to do.
  147. Can a CS144 generator on a 4.9L be opened?
  148. Newbie here with a stall problem!
  149. The tricky TV cable...
  150. Now its knocking and oil light is on!!!
  151. Uh oh! I think my waterpump finally went!
  152. Accursed Ignition Timing...
  153. Whats makes one of your throtte blades wires Loose on one of the throttle blades
  154. How to gut a cat?
  155. Cooling Fans
  156. 90 Seville.. obd codes beginning with R??
  157. Sometimes she idles at 600-625... sometimes 900
  158. Oxygen sensor cured startup WOT
  159. Transmission rough downshifting to 1st
  160. Power Steering Leak...
  161. Tranny problem on an 89 eldo!
  162. If you need scans of service manual.. 1990 Cadillac
  163. This poor ol' car has been so abused.
  164. ****!!!! Flat Cam Now!!!!!!
  165. E53 - Distributor Signal Interrupt
  166. help
  167. HT-4100 modified for flex-fuel?
  168. 94 problem
  169. 4100 Engine Modified for Flex-Fuel?
  170. How important is the PCV?
  171. Replace the alternator or don't do it?
  172. 82 Hearse Hard Starting Cold - Codes
  173. Slight tick at idle, '92 Sedan deVille.
  174. Coolant Hell (and *gulp* headgasket?)
  175. Inconsistent loud bang from under hood
  176. mmmm Swisschesse.......ed the airbox :).
  177. Info on fuel injectors
  178. God No!!!!!!
  179. Reduced EGR flow - Detonation
  180. Fuel Pressure Inquiries
  181. My 4100 will not go past 50mph
  182. How come my motor goes full throttle on startup?
  183. Why are 4.x lifters noisy?
  184. 4.5 TBI vs 4.1 TBI
  185. power steering pump
  186. 93 Deville Loss of Power getting 6-7 MPG !!!
  187. Need Help Bad!
  188. 4.9 Exhaust
  189. 83 Eldorado swapping 4100 motors
  190. Wikipedia contradicted what I thought I knew
  191. I bought another HT4100 - a hearse
  192. Striped 4.9 Head Bolts Please Help
  193. Quick alternator question
  194. Please help! #1 service main part#?? 4.9 3545718 no good according to Cadillac?
  195. changing the distributer cap and rotor on a 91 deville 4.9
  196. Kill Switch - 1990 Cadillac DeVille
  197. Advice! My idle has gone nuts!
  198. SeaFoam Method
  199. Need Throttle Body Help!
  200. Shorted Mat sensor signal, E37.
  201. rhoads lifters?
  202. Say I buy a new 4.5 and transmission.. give me a rundown of wht it takes to put it in
  203. YES!!! It RUNS!!!!!
  204. Plugs and wires..
  205. Shadetree hall of shame.. I did something STUPID
  206. 4.9 Cracked Block Leaking Coolant
  207. How bad is this on the transmission...
  208. Rattling...
  209. Questions about replacing 4.5 motor/tranny
  210. 4.9 is running niiiiiiiiice.....
  211. Questions on ISC
  212. 4100 Timing Advance question.
  213. what causes an e55?
  214. 92 deville 4.9 timing cover question
  215. Why Does ?
  216. Fuel Injector Selection
  217. No overdrive
  218. Wobbly pulley
  219. 4.1 spark plug ????
  220. How much does 4.1 engine weigh??
  221. 1990 Cadillac Sedan DeVille
  222. Here is a video of the 86 fleetwood.
  223. Who's 4100 sounds like this?
  224. What is the BEST MOTOR FLUSH out there?
  225. Collapsed lifter!
  226. MAT sensor?
  227. Engine cradle bolts?
  228. Cam shaft test?...
  229. Can't get these bolts off...
  230. GM top end cleaner or seafoam..
  231. I broke my motor
  232. What causes a f48 code?
  233. Need to know ?
  234. GM Too Expensive Cleaner...
  235. oil problem
  236. I Am A Retard
  237. Engine Miss, (electronic not mechanical)
  238. Help with Plug Wires and a few other items on 4.9L 93 SDV
  239. 1985 4.1 Help
  240. 93' 4.9 Eldorado Heating
  241. Factory 4.x alternator
  242. Back firing/stalling/knocking HT-4100
  243. 88 deville tech question?
  244. Engine Upgrade?
  245. Little help with throttle issue...
  246. Custom Exhaust Manifolds and down pipe... for the 4.9
  247. 4.9 or 4.6
  248. FWD 86 Fleetwood For Sale.
  249. whats the diffrence?
  250. Help with cold stalling problem