: HT4100 4.1, 4.5, 4.9



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