: HT4100 4.1, 4.5, 4.9



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