: HT4100 4.1, 4.5, 4.9



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  1. Got Injectors? 4.9/4.5
  2. E048
  3. Why Wont This Car Start After I Put In A New Alternator.
  4. '85 Throttle Body in an 82 Eldo???
  5. 4.9 knocking
  6. Hole In Muffler(Recommended Replacement)
  7. 91 DeVille
  8. In reguard to my deville's rough idleing,could it just need an induction service?
  9. Code question.
  10. Plugs for 4.9
  11. 1994 Deville 4.9 (Serpentine Belt) - Save Me From the Junk Yard
  12. Inaccurate gas readout?
  13. 1990 Allante fuel injectors
  14. 4.9 with sleeves?
  15. 4.9 Air Cleaner
  16. Stoneage_caddy my deville is stuttering when idleing,any ideas?
  17. 92 4.9 fleetwood high idle
  18. 1994 4.9L won't pass emissions HCs too high How to fix?
  19. HELLO - I'm seeing an error code 52 - any idea what that means?
  20. 4100 Reliability
  21. 1982 eldorado low oiil pressure light on immediately after oil change??
  22. 82 deville VIBE SOLVED
  23. let the thing blow up??
  24. Low Oil Pressure Light 1982 eldorado
  25. engins problem
  26. radiator blew apart
  27. new to the forum - big problem
  28. Whats the best place to find a replacment 4.9
  29. RE: 82 deville
  30. 4.1 ELDO Hesitation and Stall
  31. 84 4.1 Eldo
  32. Fuel Injectors
  33. Regular gas vs. premium gas
  34. used injectors
  35. 82 deville vibration
  36. '84 Eldo Failed NOx
  37. Wow...26+ MPG in a 3900# vehicle with over 700 lbs of cargo/passengers
  38. Collapsed UPPER Rad Hose!
  39. injectors
  40. 4.9 Froze
  41. 4.1 Giving 3 codes...Need help
  42. Is the 4.9 Under Rated?
  43. I need a water pump have a couple of questions.
  44. 4.1 v6, 4.1 v8-- What's the differance?
  45. Dip Stick Tube
  46. 85 Fleetwood Brougham W/ 4100 -- No Start...
  47. Open or closed deck block
  48. Emission Results fine in set timing mode?
  49. A new problem...
  50. 4.9 Dead - How easy to swap in a 4.5?
  51. need some help
  52. What are common issues with the 4.9?
  53. injector part number
  54. Overheating not block or head 83 Brougham anyone know whats wrong?
  55. changing spark plugs
  56. A few qestions regarding timing, etc.
  57. 1990 feleetwood codes on air control panel
  58. 93 seville sls idle problems
  59. 86 Cadillac Deville Timing
  60. 85 FWB W/ 4100 Hesitation...
  61. 89 Deville, What would cause this?
  62. THROTTLE PROBLEMS 95 DeVILLE 4.9
  63. Can't seem to fond the answer.
  64. Anyone tested 4.9's fwhp?
  65. Could a catalytic convertor go bad in 2 years?
  66. Switched Oil and now it clatters!!!!!
  67. Fuel Injectors help!!!
  68. 1990 Allante Engine
  69. ISC motor ratchets after shutoff
  70. BBOB or ANYONE---A LITTLE HELP!!
  71. Need help with fuel system
  72. Got a VSS code on my 1990 Deville!!
  73. fuel injection parts
  74. Does the 4.9 really need 91 octane????
  75. When do u change the O2 sensors?
  76. 90 Deville hesitation after driving for hours
  77. 4.9 liter oil use?
  78. 91 DeVille--Problems to Watch For
  79. Failed Smog Test Please Help!!!
  80. Why would the NOx increase after my EGR is hooked up?
  81. 90 Deville runs like crap
  82. miss on the 4.5litre?
  83. Transmission service
  84. 91 caddy deville runs wrong
  85. 4.1 Serpentine Belt Frozen
  86. 'hidden Warranties'
  87. Please Help Me!!!
  88. high RPM, ISC not the problem?
  89. What is the Top mph a 4.9 can hit before it cuts off?
  90. what perfomance mods,if any???
  91. new problem arising?
  92. 4.9 Questions...
  93. 89 deville runs rough intermittantly??
  94. Injector Failure At 43,000 Miles???
  95. 4.1 Engine seems to be running rich
  96. 91 DeVille wants to go like crazy! Whats up?
  97. 4.1 Clutch Fan hooped?
  98. spark plug torque for 1991 4.9
  99. 93 Deville Werid Noise
  100. '90 Seville with 4.5 Knocks when warm
  101. Are the GM replacemnt 4100's a better design ?
  102. HT 4100 flooding out badly. Warm or cold
  103. fuel system problem...i think
  104. 85 eldo
  105. 94 deville loss of power
  106. where does the "gas mileage" sensor collect the data?
  107. leaking "fuel filter "??
  108. Dead mouse in the heater/ AC box HELP !!!
  109. 4.9 head gaskets fel-pro vs GM
  110. Fuel Guage problem
  111. help! i think i blew it. 4.5 hg
  112. 1988 4.5l fwd eats up distributor gears
  113. 88 eldo codes but why
  114. Source for sleeves 4.1 4.5 etc
  115. 85 FWB stalled out and won't start
  116. Should I buy it, guys?
  117. carb removal help urgent
  118. torx
  119. NEED HELP -Stalled 92 Seville STS, won't start
  120. Need help quick please 4.9 deville
  121. 1st post: Eldorado dies 3 miles after I bought it...HELP!
  122. 1990 Deville idle issue
  123. no rad fans 90 deville 4.5
  124. SERVICE SOON light comes on random, but serviced at dealer last year.
  125. Oil pressure in HT4100?
  126. MAP reading while applying brake
  127. tranny jumping in and out of gears
  128. Roaring Rattling Deville
  129. is my engine shot????
  130. 1990 cadillac sedan deville
  131. 4.9 Manifolds????
  132. 4.5L replacement for 4.1 in 84 eldo/seville?
  133. Rebuild 4.9L thread?
  134. 4.9 pushrod length/width?
  135. 4.1 engine questions
  136. Exaust question
  137. Low RPM ENgine Rough
  138. removing oil pan from 92 DeVille
  139. Steel Rocker Arm Supports
  140. 91 Eldorado Performance Tips
  141. A/C Leak
  142. TPS wiring Question.
  143. heres where im leaking coolant *pics
  144. 1991 SedanDeVille - "Service Engine Soon" Light
  145. The Surge/Stumble Revisited
  146. intermittent miss 4.5 1990 deville
  147. Adjusting the TPS - Right or Wrong?
  148. Whats up guys! I really need your help!!
  149. GM Coolant Pellets Do Not Work....
  150. Went through my codes today and...(help)
  151. 89 sedan deville hesitation problem--HELP!
  152. help with code please
  153. 4100 1990 deville
  154. Newbie here with a warning about Autozones (Wells) TPS
  155. Blown Head Gaskets 4.5 or 4.9 V8
  156. Red Line Water Wetter ?
  157. 4.5 Cooling System Additive
  158. 1987 Cadillac Sedan Deville
  159. My 1986 Cadi engine revs continually
  160. Hey, can anyone help me with this 4.9?
  161. 20w50 5W30 oil,not for use in a 4.9 liter engine?
  162. DeVille (DEVIL?) 91 *extreme* power loss.
  163. 92 Deville will not run with MAP sensor connected
  164. 85 Fleetwood 4.1 (FWD) NO START
  165. How to detect a misfiring cylinder....
  166. Why does '90 4.5L not drop to idle till almost stopped?
  167. start,start,no start
  168. Coolant Fan manual override switch
  169. Finally have my Eldorado back w/extra hp!!
  170. Do you have to change all 8 injectors on a 1992 4.9?
  171. Car overheat real bad when sitting still for 15 minute
  172. Changed Coolant Today!
  173. 4100 rwd deville swap
  174. '89 4.5L, 200k miles, oil leak behind waterpump?
  175. engine code e47
  176. crankcase pressure
  177. codes
  178. What grade of fuel should I use?
  179. Vibration in 1992 4.9!?!?!?!?
  180. engine races when started cold
  181. Look inside the 104k 4.9.... and a new valve cover :)
  182. need more hp!!!!!!
  183. 87 Seville 4.1 smokeing, don't know why.
  184. Rocker arm support installation question.
  185. What happened to my post?
  186. 4.5L timing?
  187. 4.9 Custom Header - Gauging Interest
  188. 95 Deville PO39 code need help!!!!!!!!!
  189. Converter Inlet Size??
  190. throttle switch short
  191. 4100 sleeve selection (rehash?)
  192. Oil change and now the light wont go out.
  193. Is it hard to change the coolant on the 4.1?
  194. Performance parts for caddy 4.9 engine?
  195. 4.9 Custom Air intake
  196. Radiator cap PSI for 4.9
  197. Timing 94 Deville
  198. rough running after warm up
  199. Nitrous in 4.9
  200. Stripped Head Bolt Threads
  201. 83 coupe air pump
  202. Removing cat-converter...good idea or no?
  203. URGENT!! Muffler?
  204. Finally summers here, first problem..brakes stuck
  205. leaking deville 4100 need bandaid
  206. Is 104C too hot for a 4.9L 1994 Deville?
  207. Is There Such A Thing As A Starter Motor Overheating?
  208. Illumina /Bbob/Nodh and other Tech types
  209. Possible Seville Engine Swap
  210. E39 Code
  211. 4.5 Performance?
  212. ht4100 bars leaks crap help
  213. 1990 4.5 needs new injectors
  214. My buddy thought the 4.9 was like 250hp!!
  215. Engine STILL missing (intermittant), tons of work done so far--HELP!!!
  216. rumble in the 'ville
  217. My Caddy won't start.
  218. Code 19....1984 DeVille
  219. Longevity of a 4.9L Is 150K too many miles?
  220. What are the common problem areas with 4.9Ls on 1994 Deville?
  221. Knock
  222. 4.9 straightpipes
  223. how common are coolant leaks in 4.9
  224. transmission trouble
  225. 1985 HT 4100 Cast Iron Block & Head???
  226. 93 Deville Idle Sticking
  227. Stuck with a HT4100? I have the solution!
  228. 4.9 problems
  229. Tranny Cooler Part Numbers:92 ETC
  230. 85 HT4100 Swap
  231. Engine knocking
  232. Oil leak (Bbob)
  233. Ht4100 Idle
  234. Any advice on a HT4100 while I'm fixing the timing chain/gears?
  235. dumbass in need of help
  236. HT4100 Idle speed (warmed up)?
  237. Transmission lags the downshifts + sometimes upshifts after high speed drive
  238. Changing Engine Coolant
  239. P085 ....... Idle Throttle Angle Too High
  240. serpantine belt problem, 92 deville
  241. Are You Sure Rotella Is good for the 4.9?
  242. antifreeze in oil please help bbob and all
  243. 89 STS torques to one side
  244. 88 eldorado 4.5 help please
  245. 4.9 water pump bolting question?
  246. 1992 Cadillac Sedan DeVille O2 Sensors
  247. 90 Eldo w/4.5 PROJECT CAR - Advice Desired
  248. fuel injector question
  249. It's the smog pump
  250. Removing/Reinstalling Accelerator Pedal