: HT4100 4.1, 4.5, 4.9



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