: HT4100 4.1, 4.5, 4.9



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  1. My 88 Sedan Deville, HELP!!!
  2. Removing Alternator On 91 4.9
  3. 4.9 Battery Cables?
  4. Performance Muffler - Ideas?
  5. Should I flush tranny at 52K????
  6. Need Allante Parts - HELP
  7. 251 Belt Problems? Alternator/Fan not working.
  8. 4.1 no start
  9. 4.9:Emission Fail, High HC
  10. Cooling System Pressure Test
  11. 4.9 cam specs.
  12. Requesting 4.5 89' Info
  13. 1988 Eldo fuel tank swap
  14. AC duct rattle
  15. 4.5 running like poop
  16. New Electric "Turbo" not supercharger!
  17. coolant leak in 94 sedan deville (4.9)
  18. a few error codes
  19. She rufuses to be fixed
  20. 4.9 in a 85 fiero with caddy trans
  21. ISC motor acts sticky
  22. egr questions
  23. 88 Coupe deVille backfire
  24. Codes E01-E11, E95?
  25. Self Sticky - 4.9 Engine History and Changes
  26. smog pump adjustment
  27. new to forum
  28. engine missing
  29. 4.9 Idling fast and intermittent service light
  30. Interesting comparison.....
  31. Help! Caddy died and won't start
  32. popping sound when 4.9 is being raced....
  33. performance parts
  34. Injectors & Struts...
  35. 4.5L - 155hp, 180hp, 200hp variants and questions!
  36. power steering pulley
  37. 4.9 better than Northstar?
  38. ht 4100 question
  39. 1990 Deville E98
  40. transmission use
  41. Silent Performance Muffler
  42. Po85
  43. idle speed change?
  44. Cooling Fan Fault?
  45. What to do on a tune up to the 4.9?
  46. Transmission Oil Leak
  47. '90 Deville Speed Sensor.
  48. Nut down the distributor hole
  49. Trans Question 93 4.9 seville
  50. 350 SBC swap pics for DeVillish....
  51. 4.5 engine ticking noise???
  52. 4.5PFI Tune-up tips?
  53. 1990 Fleetwood to a 4.9 or N*
  54. 1985 Fleetwood FWD 4100
  55. tubes in throttle body
  56. Car shuts off after idle for 40 min
  57. ACDelco filter
  58. 1991 Fleetwood 4.9 high speed power loss
  59. Remote oil filter for 4.9 ?
  60. low oil pressure light
  61. 4.9 performance upgrades ?
  62. Premium fuel?
  63. How to find the leaky injector
  64. Cleaning the throttle body on a 4.9
  65. Spark plug removal on a 93 SDV
  66. Fuel Pump on 1990 deville
  67. 1991 Seville pics and questions
  68. Nylon or Metal timeing chain?
  69. im new here but here goes...
  70. '85 Fleetwood Brougham High Idel
  71. No fuel delivery to '87 Biaritz
  72. Better performance out of my 4.5?
  73. '89 SD 4.5 Diag. code E59, nowhere to be found.
  74. 1992 Eldorado Belt Size HELP! 4.9l
  75. Cadillac code check...
  76. $.1 motor
  77. to fix 1 or the other
  78. Caddy problems
  79. Is there a 4.9L NOS Kit?
  80. idiot lights.....
  81. i need help
  82. front pulley torque
  83. More 4.9 issues
  84. what are the best spark plugs?
  85. Engine Dyagnostic Codes
  86. information center
  87. Oil Leak 91 Eldorado 4.9
  88. idle speed adjustment
  89. Best oil filter?
  90. My errors have returned, inexplicibly. Help.
  91. DMV high emitter profile 4100 engine
  92. question on 91-up caddys with 4.9 engine
  93. Dual Output Muffler on a 91 Deville
  94. Cracked Manifold
  95. 10W40 oil is a bad weight?
  96. Dynomax Super Turbo
  97. Anyone have any luck With "Performance Modules"
  98. New To 4.9s And Have A few ?s
  99. 1990 TPS relearn procedure . . .
  100. engine backfires out of throtle body
  101. 88 eldo 4.5, changed the intake gasket yesterday!!
  102. Oil leak 4.5 engine 91 Allante
  103. Motor oil brand
  104. Coolant Leak Fixed- Now Running Rough After Warmup
  105. HELP Failed Emissions!!
  106. 87 deville stalls after a few mins of driving..
  107. I need Info soon
  108. 1986 Coupe DeVille w/ HT4100 V8
  109. 4.5 reliability + durability
  110. Porting your intake....
  111. 91 seville codes
  112. What engine and box can replace 4.1?
  113. 4.1 Autobox advice needed
  114. dealer shocks with 4.9 "information"
  115. Clearing codes on a '90 Fleetwood FWD
  116. Stalling 93 Seviile
  117. My 90's got sensor issues (and a glowing Cat Conv)
  118. 89 sedan deville major problem
  119. 4.5 is just a bigger 4.1? PLUS - BarsLeak or not?
  120. Hard to start below 0 F
  121. 82 4100 front crank oil leak
  122. 1992 Seville High Idle??
  123. Low Oil Pressure - 84 Eldo
  124. Computer Codes and Stereo Questions
  125. didn't pass emissions???
  126. Cooling Problems
  127. My '87 Deville is not running good when warm
  128. Oxygen Sensors - 1993 4.9
  129. Chips
  130. 4.5L V8 engine block leaking?
  131. Best way to use GM top end cleaner in the 4.9?
  132. 94 4.9L S-belt idlers blown - help!!
  133. 4.9L Injectors
  134. Tune up - do I have a distributor cap and rotor?
  135. 4.9 knocks under load
  136. 4.9l V8 Sfi Ohv 16v
  137. such a....BAD vibration..
  138. Can I use any coolant in my 4.9?
  139. 1995 Deville... ONLY 28K miles.... HELP
  140. NO Heat - Deville '87
  141. What can I do to make my 4.9 run like new??
  142. What kind of mpg should I be getting in my 92 4.9?
  143. Diesel engine smell on a 90 Deville
  144. HT4100 strange coolant problem
  145. Significant V4.9 engine vibration at 1300-1600 RPM
  146. Egr!!!
  147. Need 90 SDV 4.5 Idle Reset Procedure & Diag Codes
  148. Replacing HT4100 FWD
  149. Hmmmm
  150. wheres the fuel pump on my 87..?
  151. Allante Intakes
  152. Return-to-idle switch
  153. PC interface for 1994 ???
  154. low oil pressure light
  155. Low oil pressure light when breaking
  156. 92 Deville 4.9L..how many O2 sensors.
  157. 4.9 fuel injection questions
  158. Water pump change
  159. car just stalled..not starting..oil light
  160. 85 deville low idle
  161. 1991 4.9 hesitation problem
  162. oil /STOP light and "smokey" oil on 87 caddy...
  163. code E40..power steering pressure switch..anyone else with the same problem?
  164. 4.5 oil pan removal
  165. EGR Pipe Leak
  166. HELP!! Before I kill my car!
  167. HP on a 4.9L
  168. Bad gas mileage
  169. Oil pan removal 89 Coupe Deville
  170. Iac
  171. Engine swap Question, Want to dump 4100.
  172. My car runs like POOP!!
  173. 4.9 Oil Leak
  174. Recurring misfire/injector problem?
  175. isc relearn
  176. 4.9L Idle Problem
  177. Open and closed loop
  178. stalling
  179. Cadillac engine in Sand Rail
  180. oil pressure switch on 82' 4100
  181. Running Rough After Tune Up???
  182. '87 Deville with oil light on..while in idle...help please!
  183. 4.9 Headgaskets
  184. Solved What I thought was an exhaust rattle
  185. Exhaust/Tailpipe Question
  186. 4.9 Liter Performance
  187. 4.5 fwd to chevy 350
  188. no power /bad mileage
  189. missing 4100 engine, 1988
  190. I'm trying to save a Seville from the crusher
  191. Swapping 4100 for 307. Any advice?
  192. Deville runs rough under 11 gallons of gas
  193. Engine shutter on expressway
  194. 1989 caddy surging
  195. 1988 Seville (oil-le3aks)
  196. 86 Deville,swap 4.1 for 4.9.....
  197. performance exhaust for 4.9
  198. Interestingly Odd Problem!
  199. Deville 4.9 Intake Mods?
  200. BIG problem with the AIR system.....
  201. Ran rough for one minute, then gone!??
  202. What a stupid place for an oil filter!!
  203. best oil for high mileage 4.9
  204. RPM at idle for 1987 cadillac eldorado
  205. 4100 service now light
  206. 89 Cadillac Deville
  207. 1990 Allante won't start
  208. Heater core replaced, now AC line is freezing
  209. Disappearing coolant
  210. O2 sensor
  211. Oh No!!!!! Blown 4.9 Headgasket !!!!
  212. how to/ Tune up
  213. Help!! 95 Deville Fuel Inj Test
  214. 4.9 performance
  215. 92 Eldo Problems
  216. Need info on the fuel injection system on the 4100
  217. car problems
  218. firing order
  219. stripped cylinder head bolt hole on a 4.9L
  220. Newbie looking for HT4100 info
  221. Need 4.9 info.
  222. Oil Leak, 92, 4.9
  223. New member needs some help
  224. Trouble Shooting
  225. Bosch Fuel Injectors
  226. '94 Deville4.9L idles rough !
  227. Where is the fuel filter on a 90 Coupe DeVille??
  228. Engine Swaps and Expense
  229. 4.9 bearing thump
  230. Doss
  231. Recurring Cooling Problems - any ideas?
  232. Need Advise on ISC Adjustment
  233. 4.9 aftermarket (possibly)
  234. 4.9L and HEI help!
  235. 4.9 life expectancy
  236. Dead DeVille Aftermath!
  237. anyone with a GM manual ????angie????
  238. disable traction control
  239. Help! DeVille is dying!
  240. 4.5 vs. 4.9.... Allante....questions......
  241. check your egr tubes 4.9 bruthas
  242. 1984 4.1 liter waterpump
  243. H.E.I. Help Needed
  244. Low speed hesitation on pull away.
  245. 4.9 liter question
  246. bad EGR valve=poor mpg?
  247. 4.9 crappy milage
  248. More 4.9 Stall Problems!
  249. 4.9 jiggles
  250. injectors for '90 Deville