: HT4100 4.1, 4.5, 4.9



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  1. Cooling System Pressure Test
  2. 4.9 cam specs.
  3. Requesting 4.5 89' Info
  4. 1988 Eldo fuel tank swap
  5. AC duct rattle
  6. 4.5 running like poop
  7. New Electric "Turbo" not supercharger!
  8. coolant leak in 94 sedan deville (4.9)
  9. a few error codes
  10. She rufuses to be fixed
  11. 4.9 in a 85 fiero with caddy trans
  12. ISC motor acts sticky
  13. egr questions
  14. 88 Coupe deVille backfire
  15. Codes E01-E11, E95?
  16. Self Sticky - 4.9 Engine History and Changes
  17. smog pump adjustment
  18. new to forum
  19. engine missing
  20. 4.9 Idling fast and intermittent service light
  21. Interesting comparison.....
  22. Help! Caddy died and won't start
  23. popping sound when 4.9 is being raced....
  24. performance parts
  25. Injectors & Struts...
  26. 4.5L - 155hp, 180hp, 200hp variants and questions!
  27. power steering pulley
  28. 4.9 better than Northstar?
  29. ht 4100 question
  30. 1990 Deville E98
  31. transmission use
  32. Silent Performance Muffler
  33. Po85
  34. idle speed change?
  35. Cooling Fan Fault?
  36. What to do on a tune up to the 4.9?
  37. Transmission Oil Leak
  38. '90 Deville Speed Sensor.
  39. Nut down the distributor hole
  40. Trans Question 93 4.9 seville
  41. 350 SBC swap pics for DeVillish....
  42. 4.5 engine ticking noise???
  43. 4.5PFI Tune-up tips?
  44. 1990 Fleetwood to a 4.9 or N*
  45. 1985 Fleetwood FWD 4100
  46. tubes in throttle body
  47. Car shuts off after idle for 40 min
  48. ACDelco filter
  49. 1991 Fleetwood 4.9 high speed power loss
  50. Remote oil filter for 4.9 ?
  51. low oil pressure light
  52. 4.9 performance upgrades ?
  53. Premium fuel?
  54. How to find the leaky injector
  55. Cleaning the throttle body on a 4.9
  56. Spark plug removal on a 93 SDV
  57. Fuel Pump on 1990 deville
  58. 1991 Seville pics and questions
  59. Nylon or Metal timeing chain?
  60. im new here but here goes...
  61. '85 Fleetwood Brougham High Idel
  62. No fuel delivery to '87 Biaritz
  63. Better performance out of my 4.5?
  64. '89 SD 4.5 Diag. code E59, nowhere to be found.
  65. 1992 Eldorado Belt Size HELP! 4.9l
  66. Cadillac code check...
  67. $.1 motor
  68. to fix 1 or the other
  69. Caddy problems
  70. Is there a 4.9L NOS Kit?
  71. idiot lights.....
  72. i need help
  73. front pulley torque
  74. More 4.9 issues
  75. what are the best spark plugs?
  76. Engine Dyagnostic Codes
  77. information center
  78. Oil Leak 91 Eldorado 4.9
  79. idle speed adjustment
  80. Best oil filter?
  81. My errors have returned, inexplicibly. Help.
  82. DMV high emitter profile 4100 engine
  83. question on 91-up caddys with 4.9 engine
  84. Dual Output Muffler on a 91 Deville
  85. Cracked Manifold
  86. 10W40 oil is a bad weight?
  87. Dynomax Super Turbo
  88. Anyone have any luck With "Performance Modules"
  89. New To 4.9s And Have A few ?s
  90. 1990 TPS relearn procedure . . .
  91. engine backfires out of throtle body
  92. 88 eldo 4.5, changed the intake gasket yesterday!!
  93. Oil leak 4.5 engine 91 Allante
  94. Motor oil brand
  95. Coolant Leak Fixed- Now Running Rough After Warmup
  96. HELP Failed Emissions!!
  97. 87 deville stalls after a few mins of driving..
  98. I need Info soon
  99. 1986 Coupe DeVille w/ HT4100 V8
  100. 4.5 reliability + durability
  101. Porting your intake....
  102. 91 seville codes
  103. What engine and box can replace 4.1?
  104. 4.1 Autobox advice needed
  105. dealer shocks with 4.9 "information"
  106. Clearing codes on a '90 Fleetwood FWD
  107. Stalling 93 Seviile
  108. My 90's got sensor issues (and a glowing Cat Conv)
  109. 89 sedan deville major problem
  110. 4.5 is just a bigger 4.1? PLUS - BarsLeak or not?
  111. Hard to start below 0 F
  112. 82 4100 front crank oil leak
  113. 1992 Seville High Idle??
  114. Low Oil Pressure - 84 Eldo
  115. Computer Codes and Stereo Questions
  116. didn't pass emissions???
  117. Cooling Problems
  118. My '87 Deville is not running good when warm
  119. Oxygen Sensors - 1993 4.9
  120. Chips
  121. 4.5L V8 engine block leaking?
  122. Best way to use GM top end cleaner in the 4.9?
  123. 94 4.9L S-belt idlers blown - help!!
  124. 4.9L Injectors
  125. Tune up - do I have a distributor cap and rotor?
  126. 4.9 knocks under load
  127. 4.9l V8 Sfi Ohv 16v
  128. such a....BAD vibration..
  129. Can I use any coolant in my 4.9?
  130. 1995 Deville... ONLY 28K miles.... HELP
  131. NO Heat - Deville '87
  132. What can I do to make my 4.9 run like new??
  133. What kind of mpg should I be getting in my 92 4.9?
  134. Diesel engine smell on a 90 Deville
  135. HT4100 strange coolant problem
  136. Significant V4.9 engine vibration at 1300-1600 RPM
  137. Egr!!!
  138. Need 90 SDV 4.5 Idle Reset Procedure & Diag Codes
  139. Replacing HT4100 FWD
  140. Hmmmm
  141. wheres the fuel pump on my 87..?
  142. Allante Intakes
  143. Return-to-idle switch
  144. PC interface for 1994 ???
  145. low oil pressure light
  146. Low oil pressure light when breaking
  147. 92 Deville 4.9L..how many O2 sensors.
  148. 4.9 fuel injection questions
  149. Water pump change
  150. car just stalled..not starting..oil light
  151. 85 deville low idle
  152. 1991 4.9 hesitation problem
  153. oil /STOP light and "smokey" oil on 87 caddy...
  154. code E40..power steering pressure switch..anyone else with the same problem?
  155. 4.5 oil pan removal
  156. EGR Pipe Leak
  157. HELP!! Before I kill my car!
  158. HP on a 4.9L
  159. Bad gas mileage
  160. Oil pan removal 89 Coupe Deville
  161. Iac
  162. Engine swap Question, Want to dump 4100.
  163. My car runs like POOP!!
  164. 4.9 Oil Leak
  165. Recurring misfire/injector problem?
  166. isc relearn
  167. 4.9L Idle Problem
  168. Open and closed loop
  169. stalling
  170. Cadillac engine in Sand Rail
  171. oil pressure switch on 82' 4100
  172. Running Rough After Tune Up???
  173. '87 Deville with oil light on..while in idle...help please!
  174. 4.9 Headgaskets
  175. Solved What I thought was an exhaust rattle
  176. Exhaust/Tailpipe Question
  177. 4.9 Liter Performance
  178. 4.5 fwd to chevy 350
  179. no power /bad mileage
  180. missing 4100 engine, 1988
  181. I'm trying to save a Seville from the crusher
  182. Swapping 4100 for 307. Any advice?
  183. Deville runs rough under 11 gallons of gas
  184. Engine shutter on expressway
  185. 1989 caddy surging
  186. 1988 Seville (oil-le3aks)
  187. 86 Deville,swap 4.1 for 4.9.....
  188. performance exhaust for 4.9
  189. Interestingly Odd Problem!
  190. Deville 4.9 Intake Mods?
  191. BIG problem with the AIR system.....
  192. Ran rough for one minute, then gone!??
  193. What a stupid place for an oil filter!!
  194. best oil for high mileage 4.9
  195. RPM at idle for 1987 cadillac eldorado
  196. 4100 service now light
  197. 89 Cadillac Deville
  198. 1990 Allante won't start
  199. Heater core replaced, now AC line is freezing
  200. Disappearing coolant
  201. O2 sensor
  202. Oh No!!!!! Blown 4.9 Headgasket !!!!
  203. how to/ Tune up
  204. Help!! 95 Deville Fuel Inj Test
  205. 4.9 performance
  206. 92 Eldo Problems
  207. Need info on the fuel injection system on the 4100
  208. car problems
  209. firing order
  210. stripped cylinder head bolt hole on a 4.9L
  211. Newbie looking for HT4100 info
  212. Need 4.9 info.
  213. Oil Leak, 92, 4.9
  214. New member needs some help
  215. Trouble Shooting
  216. Bosch Fuel Injectors
  217. '94 Deville4.9L idles rough !
  218. Where is the fuel filter on a 90 Coupe DeVille??
  219. Engine Swaps and Expense
  220. 4.9 bearing thump
  221. Doss
  222. Recurring Cooling Problems - any ideas?
  223. Need Advise on ISC Adjustment
  224. 4.9 aftermarket (possibly)
  225. 4.9L and HEI help!
  226. 4.9 life expectancy
  227. Dead DeVille Aftermath!
  228. anyone with a GM manual ????angie????
  229. disable traction control
  230. Help! DeVille is dying!
  231. 4.5 vs. 4.9.... Allante....questions......
  232. check your egr tubes 4.9 bruthas
  233. 1984 4.1 liter waterpump
  234. H.E.I. Help Needed
  235. Low speed hesitation on pull away.
  236. 4.9 liter question
  237. bad EGR valve=poor mpg?
  238. 4.9 crappy milage
  239. More 4.9 Stall Problems!
  240. 4.9 jiggles
  241. injectors for '90 Deville
  242. 4.9 Stall Problem
  243. 1990 4.5 Deville rough idle/miss
  244. Service Code E30
  245. 4.9 performance
  246. What's so great about the 4.9 engine?
  247. 4.9 Serpentine Belt
  248. deck the heads?
  249. Leaky but good engine
  250. free power??