: HT4100 4.1, 4.5, 4.9



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  1. Searched codes for the first time and I need help.
  2. error E46 where to start?
  3. 1992 Eldorado 4.9l A/C Help...
  4. Error code E31 (93 Deville 4.9L)
  5. 4.9 air filter question...
  6. please help
  7. 88 4.5 Coupe Deville
  8. Rough Idle, stalls and hesitations, but...
  9. Need Help with BarsLeak and Radiator drain!
  10. '92 4.9 operating temp
  11. Engine etc.
  12. Distributor Cap
  13. Car is running rich
  14. 4.1 oil capacity
  15. no heat in cab + overheating
  16. My 88 Sedan Deville, HELP!!!
  17. Removing Alternator On 91 4.9
  18. 4.9 Battery Cables?
  19. Performance Muffler - Ideas?
  20. Should I flush tranny at 52K????
  21. Need Allante Parts - HELP
  22. 251 Belt Problems? Alternator/Fan not working.
  23. 4.1 no start
  24. 4.9:Emission Fail, High HC
  25. Cooling System Pressure Test
  26. 4.9 cam specs.
  27. Requesting 4.5 89' Info
  28. 1988 Eldo fuel tank swap
  29. AC duct rattle
  30. 4.5 running like poop
  31. New Electric "Turbo" not supercharger!
  32. coolant leak in 94 sedan deville (4.9)
  33. a few error codes
  34. She rufuses to be fixed
  35. 4.9 in a 85 fiero with caddy trans
  36. ISC motor acts sticky
  37. egr questions
  38. 88 Coupe deVille backfire
  39. Codes E01-E11, E95?
  40. Self Sticky - 4.9 Engine History and Changes
  41. smog pump adjustment
  42. new to forum
  43. engine missing
  44. 4.9 Idling fast and intermittent service light
  45. Interesting comparison.....
  46. Help! Caddy died and won't start
  47. popping sound when 4.9 is being raced....
  48. performance parts
  49. Injectors & Struts...
  50. 4.5L - 155hp, 180hp, 200hp variants and questions!
  51. power steering pulley
  52. 4.9 better than Northstar?
  53. ht 4100 question
  54. 1990 Deville E98
  55. transmission use
  56. Silent Performance Muffler
  57. Po85
  58. idle speed change?
  59. Cooling Fan Fault?
  60. What to do on a tune up to the 4.9?
  61. Transmission Oil Leak
  62. '90 Deville Speed Sensor.
  63. Nut down the distributor hole
  64. Trans Question 93 4.9 seville
  65. 350 SBC swap pics for DeVillish....
  66. 4.5 engine ticking noise???
  67. 4.5PFI Tune-up tips?
  68. 1990 Fleetwood to a 4.9 or N*
  69. 1985 Fleetwood FWD 4100
  70. tubes in throttle body
  71. Car shuts off after idle for 40 min
  72. ACDelco filter
  73. 1991 Fleetwood 4.9 high speed power loss
  74. Remote oil filter for 4.9 ?
  75. low oil pressure light
  76. 4.9 performance upgrades ?
  77. Premium fuel?
  78. How to find the leaky injector
  79. Cleaning the throttle body on a 4.9
  80. Spark plug removal on a 93 SDV
  81. Fuel Pump on 1990 deville
  82. 1991 Seville pics and questions
  83. Nylon or Metal timeing chain?
  84. im new here but here goes...
  85. '85 Fleetwood Brougham High Idel
  86. No fuel delivery to '87 Biaritz
  87. Better performance out of my 4.5?
  88. '89 SD 4.5 Diag. code E59, nowhere to be found.
  89. 1992 Eldorado Belt Size HELP! 4.9l
  90. Cadillac code check...
  91. $.1 motor
  92. to fix 1 or the other
  93. Caddy problems
  94. Is there a 4.9L NOS Kit?
  95. idiot lights.....
  96. i need help
  97. front pulley torque
  98. More 4.9 issues
  99. what are the best spark plugs?
  100. Engine Dyagnostic Codes
  101. information center
  102. Oil Leak 91 Eldorado 4.9
  103. idle speed adjustment
  104. Best oil filter?
  105. My errors have returned, inexplicibly. Help.
  106. DMV high emitter profile 4100 engine
  107. question on 91-up caddys with 4.9 engine
  108. Dual Output Muffler on a 91 Deville
  109. Cracked Manifold
  110. 10W40 oil is a bad weight?
  111. Dynomax Super Turbo
  112. Anyone have any luck With "Performance Modules"
  113. New To 4.9s And Have A few ?s
  114. 1990 TPS relearn procedure . . .
  115. engine backfires out of throtle body
  116. 88 eldo 4.5, changed the intake gasket yesterday!!
  117. Oil leak 4.5 engine 91 Allante
  118. Motor oil brand
  119. Coolant Leak Fixed- Now Running Rough After Warmup
  120. HELP Failed Emissions!!
  121. 87 deville stalls after a few mins of driving..
  122. I need Info soon
  123. 1986 Coupe DeVille w/ HT4100 V8
  124. 4.5 reliability + durability
  125. Porting your intake....
  126. 91 seville codes
  127. What engine and box can replace 4.1?
  128. 4.1 Autobox advice needed
  129. dealer shocks with 4.9 "information"
  130. Clearing codes on a '90 Fleetwood FWD
  131. Stalling 93 Seviile
  132. My 90's got sensor issues (and a glowing Cat Conv)
  133. 89 sedan deville major problem
  134. 4.5 is just a bigger 4.1? PLUS - BarsLeak or not?
  135. Hard to start below 0 F
  136. 82 4100 front crank oil leak
  137. 1992 Seville High Idle??
  138. Low Oil Pressure - 84 Eldo
  139. Computer Codes and Stereo Questions
  140. didn't pass emissions???
  141. Cooling Problems
  142. My '87 Deville is not running good when warm
  143. Oxygen Sensors - 1993 4.9
  144. Chips
  145. 4.5L V8 engine block leaking?
  146. Best way to use GM top end cleaner in the 4.9?
  147. 94 4.9L S-belt idlers blown - help!!
  148. 4.9L Injectors
  149. Tune up - do I have a distributor cap and rotor?
  150. 4.9 knocks under load
  151. 4.9l V8 Sfi Ohv 16v
  152. such a....BAD vibration..
  153. Can I use any coolant in my 4.9?
  154. 1995 Deville... ONLY 28K miles.... HELP
  155. NO Heat - Deville '87
  156. What can I do to make my 4.9 run like new??
  157. What kind of mpg should I be getting in my 92 4.9?
  158. Diesel engine smell on a 90 Deville
  159. HT4100 strange coolant problem
  160. Significant V4.9 engine vibration at 1300-1600 RPM
  161. Egr!!!
  162. Need 90 SDV 4.5 Idle Reset Procedure & Diag Codes
  163. Replacing HT4100 FWD
  164. Hmmmm
  165. wheres the fuel pump on my 87..?
  166. Allante Intakes
  167. Return-to-idle switch
  168. PC interface for 1994 ???
  169. low oil pressure light
  170. Low oil pressure light when breaking
  171. 92 Deville 4.9L..how many O2 sensors.
  172. 4.9 fuel injection questions
  173. Water pump change
  174. car just stalled..not starting..oil light
  175. 85 deville low idle
  176. 1991 4.9 hesitation problem
  177. oil /STOP light and "smokey" oil on 87 caddy...
  178. code E40..power steering pressure switch..anyone else with the same problem?
  179. 4.5 oil pan removal
  180. EGR Pipe Leak
  181. HELP!! Before I kill my car!
  182. HP on a 4.9L
  183. Bad gas mileage
  184. Oil pan removal 89 Coupe Deville
  185. Iac
  186. Engine swap Question, Want to dump 4100.
  187. My car runs like POOP!!
  188. 4.9 Oil Leak
  189. Recurring misfire/injector problem?
  190. isc relearn
  191. 4.9L Idle Problem
  192. Open and closed loop
  193. stalling
  194. Cadillac engine in Sand Rail
  195. oil pressure switch on 82' 4100
  196. Running Rough After Tune Up???
  197. '87 Deville with oil light on..while in idle...help please!
  198. 4.9 Headgaskets
  199. Solved What I thought was an exhaust rattle
  200. Exhaust/Tailpipe Question
  201. 4.9 Liter Performance
  202. 4.5 fwd to chevy 350
  203. no power /bad mileage
  204. missing 4100 engine, 1988
  205. I'm trying to save a Seville from the crusher
  206. Swapping 4100 for 307. Any advice?
  207. Deville runs rough under 11 gallons of gas
  208. Engine shutter on expressway
  209. 1989 caddy surging
  210. 1988 Seville (oil-le3aks)
  211. 86 Deville,swap 4.1 for 4.9.....
  212. performance exhaust for 4.9
  213. Interestingly Odd Problem!
  214. Deville 4.9 Intake Mods?
  215. BIG problem with the AIR system.....
  216. Ran rough for one minute, then gone!??
  217. What a stupid place for an oil filter!!
  218. best oil for high mileage 4.9
  219. RPM at idle for 1987 cadillac eldorado
  220. 4100 service now light
  221. 89 Cadillac Deville
  222. 1990 Allante won't start
  223. Heater core replaced, now AC line is freezing
  224. Disappearing coolant
  225. O2 sensor
  226. Oh No!!!!! Blown 4.9 Headgasket !!!!
  227. how to/ Tune up
  228. Help!! 95 Deville Fuel Inj Test
  229. 4.9 performance
  230. 92 Eldo Problems
  231. Need info on the fuel injection system on the 4100
  232. car problems
  233. firing order
  234. stripped cylinder head bolt hole on a 4.9L
  235. Newbie looking for HT4100 info
  236. Need 4.9 info.
  237. Oil Leak, 92, 4.9
  238. New member needs some help
  239. Trouble Shooting
  240. Bosch Fuel Injectors
  241. '94 Deville4.9L idles rough !
  242. Where is the fuel filter on a 90 Coupe DeVille??
  243. Engine Swaps and Expense
  244. 4.9 bearing thump
  245. Doss
  246. Recurring Cooling Problems - any ideas?
  247. Need Advise on ISC Adjustment
  248. 4.9 aftermarket (possibly)
  249. 4.9L and HEI help!
  250. 4.9 life expectancy