: HT4100 4.1, 4.5, 4.9



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