: HT4100 4.1, 4.5, 4.9



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  1. In reguard to my deville's rough idleing,could it just need an induction service?
  2. Code question.
  3. Plugs for 4.9
  4. 1994 Deville 4.9 (Serpentine Belt) - Save Me From the Junk Yard
  5. Inaccurate gas readout?
  6. 1990 Allante fuel injectors
  7. 4.9 with sleeves?
  8. 4.9 Air Cleaner
  9. Stoneage_caddy my deville is stuttering when idleing,any ideas?
  10. 92 4.9 fleetwood high idle
  11. 1994 4.9L won't pass emissions HCs too high How to fix?
  12. HELLO - I'm seeing an error code 52 - any idea what that means?
  13. 4100 Reliability
  14. 1982 eldorado low oiil pressure light on immediately after oil change??
  15. 82 deville VIBE SOLVED
  16. let the thing blow up??
  17. Low Oil Pressure Light 1982 eldorado
  18. engins problem
  19. radiator blew apart
  20. new to the forum - big problem
  21. Whats the best place to find a replacment 4.9
  22. RE: 82 deville
  23. 4.1 ELDO Hesitation and Stall
  24. 84 4.1 Eldo
  25. Fuel Injectors
  26. Regular gas vs. premium gas
  27. used injectors
  28. 82 deville vibration
  29. '84 Eldo Failed NOx
  30. Wow...26+ MPG in a 3900# vehicle with over 700 lbs of cargo/passengers
  31. Collapsed UPPER Rad Hose!
  32. injectors
  33. 4.9 Froze
  34. 4.1 Giving 3 codes...Need help
  35. Is the 4.9 Under Rated?
  36. I need a water pump have a couple of questions.
  37. 4.1 v6, 4.1 v8-- What's the differance?
  38. Dip Stick Tube
  39. 85 Fleetwood Brougham W/ 4100 -- No Start...
  40. Open or closed deck block
  41. Emission Results fine in set timing mode?
  42. A new problem...
  43. 4.9 Dead - How easy to swap in a 4.5?
  44. need some help
  45. What are common issues with the 4.9?
  46. injector part number
  47. Overheating not block or head 83 Brougham anyone know whats wrong?
  48. changing spark plugs
  49. A few qestions regarding timing, etc.
  50. 1990 feleetwood codes on air control panel
  51. 93 seville sls idle problems
  52. 86 Cadillac Deville Timing
  53. 85 FWB W/ 4100 Hesitation...
  54. 89 Deville, What would cause this?
  55. THROTTLE PROBLEMS 95 DeVILLE 4.9
  56. Can't seem to fond the answer.
  57. Anyone tested 4.9's fwhp?
  58. Could a catalytic convertor go bad in 2 years?
  59. Switched Oil and now it clatters!!!!!
  60. Fuel Injectors help!!!
  61. 1990 Allante Engine
  62. ISC motor ratchets after shutoff
  63. BBOB or ANYONE---A LITTLE HELP!!
  64. Need help with fuel system
  65. Got a VSS code on my 1990 Deville!!
  66. fuel injection parts
  67. Does the 4.9 really need 91 octane????
  68. When do u change the O2 sensors?
  69. 90 Deville hesitation after driving for hours
  70. 4.9 liter oil use?
  71. 91 DeVille--Problems to Watch For
  72. Failed Smog Test Please Help!!!
  73. Why would the NOx increase after my EGR is hooked up?
  74. 90 Deville runs like crap
  75. miss on the 4.5litre?
  76. Transmission service
  77. 91 caddy deville runs wrong
  78. 4.1 Serpentine Belt Frozen
  79. 'hidden Warranties'
  80. Please Help Me!!!
  81. high RPM, ISC not the problem?
  82. What is the Top mph a 4.9 can hit before it cuts off?
  83. what perfomance mods,if any???
  84. new problem arising?
  85. 4.9 Questions...
  86. 89 deville runs rough intermittantly??
  87. Injector Failure At 43,000 Miles???
  88. 4.1 Engine seems to be running rich
  89. 91 DeVille wants to go like crazy! Whats up?
  90. 4.1 Clutch Fan hooped?
  91. spark plug torque for 1991 4.9
  92. 93 Deville Werid Noise
  93. '90 Seville with 4.5 Knocks when warm
  94. Are the GM replacemnt 4100's a better design ?
  95. HT 4100 flooding out badly. Warm or cold
  96. fuel system problem...i think
  97. 85 eldo
  98. 94 deville loss of power
  99. where does the "gas mileage" sensor collect the data?
  100. leaking "fuel filter "??
  101. Dead mouse in the heater/ AC box HELP !!!
  102. 4.9 head gaskets fel-pro vs GM
  103. Fuel Guage problem
  104. help! i think i blew it. 4.5 hg
  105. 1988 4.5l fwd eats up distributor gears
  106. 88 eldo codes but why
  107. Source for sleeves 4.1 4.5 etc
  108. 85 FWB stalled out and won't start
  109. Should I buy it, guys?
  110. carb removal help urgent
  111. torx
  112. NEED HELP -Stalled 92 Seville STS, won't start
  113. Need help quick please 4.9 deville
  114. 1st post: Eldorado dies 3 miles after I bought it...HELP!
  115. 1990 Deville idle issue
  116. no rad fans 90 deville 4.5
  117. SERVICE SOON light comes on random, but serviced at dealer last year.
  118. Oil pressure in HT4100?
  119. MAP reading while applying brake
  120. tranny jumping in and out of gears
  121. Roaring Rattling Deville
  122. is my engine shot????
  123. 1990 cadillac sedan deville
  124. 4.9 Manifolds????
  125. 4.5L replacement for 4.1 in 84 eldo/seville?
  126. Rebuild 4.9L thread?
  127. 4.9 pushrod length/width?
  128. 4.1 engine questions
  129. Exaust question
  130. Low RPM ENgine Rough
  131. removing oil pan from 92 DeVille
  132. Steel Rocker Arm Supports
  133. 91 Eldorado Performance Tips
  134. A/C Leak
  135. TPS wiring Question.
  136. heres where im leaking coolant *pics
  137. 1991 SedanDeVille - "Service Engine Soon" Light
  138. The Surge/Stumble Revisited
  139. intermittent miss 4.5 1990 deville
  140. Adjusting the TPS - Right or Wrong?
  141. Whats up guys! I really need your help!!
  142. GM Coolant Pellets Do Not Work....
  143. Went through my codes today and...(help)
  144. 89 sedan deville hesitation problem--HELP!
  145. help with code please
  146. 4100 1990 deville
  147. Newbie here with a warning about Autozones (Wells) TPS
  148. Blown Head Gaskets 4.5 or 4.9 V8
  149. Red Line Water Wetter ?
  150. 4.5 Cooling System Additive
  151. 1987 Cadillac Sedan Deville
  152. My 1986 Cadi engine revs continually
  153. Hey, can anyone help me with this 4.9?
  154. 20w50 5W30 oil,not for use in a 4.9 liter engine?
  155. DeVille (DEVIL?) 91 *extreme* power loss.
  156. 92 Deville will not run with MAP sensor connected
  157. 85 Fleetwood 4.1 (FWD) NO START
  158. How to detect a misfiring cylinder....
  159. Why does '90 4.5L not drop to idle till almost stopped?
  160. start,start,no start
  161. Coolant Fan manual override switch
  162. Finally have my Eldorado back w/extra hp!!
  163. Do you have to change all 8 injectors on a 1992 4.9?
  164. Car overheat real bad when sitting still for 15 minute
  165. Changed Coolant Today!
  166. 4100 rwd deville swap
  167. '89 4.5L, 200k miles, oil leak behind waterpump?
  168. engine code e47
  169. crankcase pressure
  170. codes
  171. What grade of fuel should I use?
  172. Vibration in 1992 4.9!?!?!?!?
  173. engine races when started cold
  174. Look inside the 104k 4.9.... and a new valve cover :)
  175. need more hp!!!!!!
  176. 87 Seville 4.1 smokeing, don't know why.
  177. Rocker arm support installation question.
  178. What happened to my post?
  179. 4.5L timing?
  180. 4.9 Custom Header - Gauging Interest
  181. 95 Deville PO39 code need help!!!!!!!!!
  182. Converter Inlet Size??
  183. throttle switch short
  184. 4100 sleeve selection (rehash?)
  185. Oil change and now the light wont go out.
  186. Is it hard to change the coolant on the 4.1?
  187. Performance parts for caddy 4.9 engine?
  188. 4.9 Custom Air intake
  189. Radiator cap PSI for 4.9
  190. Timing 94 Deville
  191. rough running after warm up
  192. Nitrous in 4.9
  193. Stripped Head Bolt Threads
  194. 83 coupe air pump
  195. Removing cat-converter...good idea or no?
  196. URGENT!! Muffler?
  197. Finally summers here, first problem..brakes stuck
  198. leaking deville 4100 need bandaid
  199. Is 104C too hot for a 4.9L 1994 Deville?
  200. Is There Such A Thing As A Starter Motor Overheating?
  201. Illumina /Bbob/Nodh and other Tech types
  202. Possible Seville Engine Swap
  203. E39 Code
  204. 4.5 Performance?
  205. ht4100 bars leaks crap help
  206. 1990 4.5 needs new injectors
  207. My buddy thought the 4.9 was like 250hp!!
  208. Engine STILL missing (intermittant), tons of work done so far--HELP!!!
  209. rumble in the 'ville
  210. My Caddy won't start.
  211. Code 19....1984 DeVille
  212. Longevity of a 4.9L Is 150K too many miles?
  213. What are the common problem areas with 4.9Ls on 1994 Deville?
  214. Knock
  215. 4.9 straightpipes
  216. how common are coolant leaks in 4.9
  217. transmission trouble
  218. 1985 HT 4100 Cast Iron Block & Head???
  219. 93 Deville Idle Sticking
  220. Stuck with a HT4100? I have the solution!
  221. 4.9 problems
  222. Tranny Cooler Part Numbers:92 ETC
  223. 85 HT4100 Swap
  224. Engine knocking
  225. Oil leak (Bbob)
  226. Ht4100 Idle
  227. Any advice on a HT4100 while I'm fixing the timing chain/gears?
  228. dumbass in need of help
  229. HT4100 Idle speed (warmed up)?
  230. Transmission lags the downshifts + sometimes upshifts after high speed drive
  231. Changing Engine Coolant
  232. P085 ....... Idle Throttle Angle Too High
  233. serpantine belt problem, 92 deville
  234. Are You Sure Rotella Is good for the 4.9?
  235. antifreeze in oil please help bbob and all
  236. 89 STS torques to one side
  237. 88 eldorado 4.5 help please
  238. 4.9 water pump bolting question?
  239. 1992 Cadillac Sedan DeVille O2 Sensors
  240. 90 Eldo w/4.5 PROJECT CAR - Advice Desired
  241. fuel injector question
  242. It's the smog pump
  243. Removing/Reinstalling Accelerator Pedal
  244. Risks of Ethanol?
  245. 4.1 compression
  246. replaced water pump/wont start
  247. proper oil for 88 sedan deville
  248. Warmed up engine FLOWMASTER 40series DELTA FLOW clip
  249. Brake cleaner - does it miff the engine gaskets?
  250. 94 Deville 4.9L ...P030 and some other codes....