: HT4100 4.1, 4.5, 4.9



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  1. engine missing
  2. 4.9 Idling fast and intermittent service light
  3. Interesting comparison.....
  4. Help! Caddy died and won't start
  5. popping sound when 4.9 is being raced....
  6. performance parts
  7. Injectors & Struts...
  8. 4.5L - 155hp, 180hp, 200hp variants and questions!
  9. power steering pulley
  10. 4.9 better than Northstar?
  11. ht 4100 question
  12. 1990 Deville E98
  13. transmission use
  14. Silent Performance Muffler
  15. Po85
  16. idle speed change?
  17. Cooling Fan Fault?
  18. What to do on a tune up to the 4.9?
  19. Transmission Oil Leak
  20. '90 Deville Speed Sensor.
  21. Nut down the distributor hole
  22. Trans Question 93 4.9 seville
  23. 350 SBC swap pics for DeVillish....
  24. 4.5 engine ticking noise???
  25. 4.5PFI Tune-up tips?
  26. 1990 Fleetwood to a 4.9 or N*
  27. 1985 Fleetwood FWD 4100
  28. tubes in throttle body
  29. Car shuts off after idle for 40 min
  30. ACDelco filter
  31. 1991 Fleetwood 4.9 high speed power loss
  32. Remote oil filter for 4.9 ?
  33. low oil pressure light
  34. 4.9 performance upgrades ?
  35. Premium fuel?
  36. How to find the leaky injector
  37. Cleaning the throttle body on a 4.9
  38. Spark plug removal on a 93 SDV
  39. Fuel Pump on 1990 deville
  40. 1991 Seville pics and questions
  41. Nylon or Metal timeing chain?
  42. im new here but here goes...
  43. '85 Fleetwood Brougham High Idel
  44. No fuel delivery to '87 Biaritz
  45. Better performance out of my 4.5?
  46. '89 SD 4.5 Diag. code E59, nowhere to be found.
  47. 1992 Eldorado Belt Size HELP! 4.9l
  48. Cadillac code check...
  49. $.1 motor
  50. to fix 1 or the other
  51. Caddy problems
  52. Is there a 4.9L NOS Kit?
  53. idiot lights.....
  54. i need help
  55. front pulley torque
  56. More 4.9 issues
  57. what are the best spark plugs?
  58. Engine Dyagnostic Codes
  59. information center
  60. Oil Leak 91 Eldorado 4.9
  61. idle speed adjustment
  62. Best oil filter?
  63. My errors have returned, inexplicibly. Help.
  64. DMV high emitter profile 4100 engine
  65. question on 91-up caddys with 4.9 engine
  66. Dual Output Muffler on a 91 Deville
  67. Cracked Manifold
  68. 10W40 oil is a bad weight?
  69. Dynomax Super Turbo
  70. Anyone have any luck With "Performance Modules"
  71. New To 4.9s And Have A few ?s
  72. 1990 TPS relearn procedure . . .
  73. engine backfires out of throtle body
  74. 88 eldo 4.5, changed the intake gasket yesterday!!
  75. Oil leak 4.5 engine 91 Allante
  76. Motor oil brand
  77. Coolant Leak Fixed- Now Running Rough After Warmup
  78. HELP Failed Emissions!!
  79. 87 deville stalls after a few mins of driving..
  80. I need Info soon
  81. 1986 Coupe DeVille w/ HT4100 V8
  82. 4.5 reliability + durability
  83. Porting your intake....
  84. 91 seville codes
  85. What engine and box can replace 4.1?
  86. 4.1 Autobox advice needed
  87. dealer shocks with 4.9 "information"
  88. Clearing codes on a '90 Fleetwood FWD
  89. Stalling 93 Seviile
  90. My 90's got sensor issues (and a glowing Cat Conv)
  91. 89 sedan deville major problem
  92. 4.5 is just a bigger 4.1? PLUS - BarsLeak or not?
  93. Hard to start below 0 F
  94. 82 4100 front crank oil leak
  95. 1992 Seville High Idle??
  96. Low Oil Pressure - 84 Eldo
  97. Computer Codes and Stereo Questions
  98. didn't pass emissions???
  99. Cooling Problems
  100. My '87 Deville is not running good when warm
  101. Oxygen Sensors - 1993 4.9
  102. Chips
  103. 4.5L V8 engine block leaking?
  104. Best way to use GM top end cleaner in the 4.9?
  105. 94 4.9L S-belt idlers blown - help!!
  106. 4.9L Injectors
  107. Tune up - do I have a distributor cap and rotor?
  108. 4.9 knocks under load
  109. 4.9l V8 Sfi Ohv 16v
  110. such a....BAD vibration..
  111. Can I use any coolant in my 4.9?
  112. 1995 Deville... ONLY 28K miles.... HELP
  113. NO Heat - Deville '87
  114. What can I do to make my 4.9 run like new??
  115. What kind of mpg should I be getting in my 92 4.9?
  116. Diesel engine smell on a 90 Deville
  117. HT4100 strange coolant problem
  118. Significant V4.9 engine vibration at 1300-1600 RPM
  119. Egr!!!
  120. Need 90 SDV 4.5 Idle Reset Procedure & Diag Codes
  121. Replacing HT4100 FWD
  122. Hmmmm
  123. wheres the fuel pump on my 87..?
  124. Allante Intakes
  125. Return-to-idle switch
  126. PC interface for 1994 ???
  127. low oil pressure light
  128. Low oil pressure light when breaking
  129. 92 Deville 4.9L..how many O2 sensors.
  130. 4.9 fuel injection questions
  131. Water pump change
  132. car just stalled..not starting..oil light
  133. 85 deville low idle
  134. 1991 4.9 hesitation problem
  135. oil /STOP light and "smokey" oil on 87 caddy...
  136. code E40..power steering pressure switch..anyone else with the same problem?
  137. 4.5 oil pan removal
  138. EGR Pipe Leak
  139. HELP!! Before I kill my car!
  140. HP on a 4.9L
  141. Bad gas mileage
  142. Oil pan removal 89 Coupe Deville
  143. Iac
  144. Engine swap Question, Want to dump 4100.
  145. My car runs like POOP!!
  146. 4.9 Oil Leak
  147. Recurring misfire/injector problem?
  148. isc relearn
  149. 4.9L Idle Problem
  150. Open and closed loop
  151. stalling
  152. Cadillac engine in Sand Rail
  153. oil pressure switch on 82' 4100
  154. Running Rough After Tune Up???
  155. '87 Deville with oil light on..while in idle...help please!
  156. 4.9 Headgaskets
  157. Solved What I thought was an exhaust rattle
  158. Exhaust/Tailpipe Question
  159. 4.9 Liter Performance
  160. 4.5 fwd to chevy 350
  161. no power /bad mileage
  162. missing 4100 engine, 1988
  163. I'm trying to save a Seville from the crusher
  164. Swapping 4100 for 307. Any advice?
  165. Deville runs rough under 11 gallons of gas
  166. Engine shutter on expressway
  167. 1989 caddy surging
  168. 1988 Seville (oil-le3aks)
  169. 86 Deville,swap 4.1 for 4.9.....
  170. performance exhaust for 4.9
  171. Interestingly Odd Problem!
  172. Deville 4.9 Intake Mods?
  173. BIG problem with the AIR system.....
  174. Ran rough for one minute, then gone!??
  175. What a stupid place for an oil filter!!
  176. best oil for high mileage 4.9
  177. RPM at idle for 1987 cadillac eldorado
  178. 4100 service now light
  179. 89 Cadillac Deville
  180. 1990 Allante won't start
  181. Heater core replaced, now AC line is freezing
  182. Disappearing coolant
  183. O2 sensor
  184. Oh No!!!!! Blown 4.9 Headgasket !!!!
  185. how to/ Tune up
  186. Help!! 95 Deville Fuel Inj Test
  187. 4.9 performance
  188. 92 Eldo Problems
  189. Need info on the fuel injection system on the 4100
  190. car problems
  191. firing order
  192. stripped cylinder head bolt hole on a 4.9L
  193. Newbie looking for HT4100 info
  194. Need 4.9 info.
  195. Oil Leak, 92, 4.9
  196. New member needs some help
  197. Trouble Shooting
  198. Bosch Fuel Injectors
  199. '94 Deville4.9L idles rough !
  200. Where is the fuel filter on a 90 Coupe DeVille??
  201. Engine Swaps and Expense
  202. 4.9 bearing thump
  203. Doss
  204. Recurring Cooling Problems - any ideas?
  205. Need Advise on ISC Adjustment
  206. 4.9 aftermarket (possibly)
  207. 4.9L and HEI help!
  208. 4.9 life expectancy
  209. Dead DeVille Aftermath!
  210. anyone with a GM manual ????angie????
  211. disable traction control
  212. Help! DeVille is dying!
  213. 4.5 vs. 4.9.... Allante....questions......
  214. check your egr tubes 4.9 bruthas
  215. 1984 4.1 liter waterpump
  216. H.E.I. Help Needed
  217. Low speed hesitation on pull away.
  218. 4.9 liter question
  219. bad EGR valve=poor mpg?
  220. 4.9 crappy milage
  221. More 4.9 Stall Problems!
  222. 4.9 jiggles
  223. injectors for '90 Deville
  224. 4.9 Stall Problem
  225. 1990 4.5 Deville rough idle/miss
  226. Service Code E30
  227. 4.9 performance
  228. What's so great about the 4.9 engine?
  229. 4.9 Serpentine Belt
  230. deck the heads?
  231. Leaky but good engine
  232. free power??
  233. 4.9 Performance Help
  234. Error Codes--please help
  235. throttle angle
  236. 1993 Deville
  237. 4.5 performance parts