: HT4100 4.1, 4.5, 4.9



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  1. engins problem
  2. radiator blew apart
  3. new to the forum - big problem
  4. Whats the best place to find a replacment 4.9
  5. RE: 82 deville
  6. 4.1 ELDO Hesitation and Stall
  7. 84 4.1 Eldo
  8. Fuel Injectors
  9. Regular gas vs. premium gas
  10. used injectors
  11. 82 deville vibration
  12. '84 Eldo Failed NOx
  13. Wow...26+ MPG in a 3900# vehicle with over 700 lbs of cargo/passengers
  14. Collapsed UPPER Rad Hose!
  15. injectors
  16. 4.9 Froze
  17. 4.1 Giving 3 codes...Need help
  18. Is the 4.9 Under Rated?
  19. I need a water pump have a couple of questions.
  20. 4.1 v6, 4.1 v8-- What's the differance?
  21. Dip Stick Tube
  22. 85 Fleetwood Brougham W/ 4100 -- No Start...
  23. Open or closed deck block
  24. Emission Results fine in set timing mode?
  25. A new problem...
  26. 4.9 Dead - How easy to swap in a 4.5?
  27. need some help
  28. What are common issues with the 4.9?
  29. injector part number
  30. Overheating not block or head 83 Brougham anyone know whats wrong?
  31. changing spark plugs
  32. A few qestions regarding timing, etc.
  33. 1990 feleetwood codes on air control panel
  34. 93 seville sls idle problems
  35. 86 Cadillac Deville Timing
  36. 85 FWB W/ 4100 Hesitation...
  37. 89 Deville, What would cause this?
  38. THROTTLE PROBLEMS 95 DeVILLE 4.9
  39. Can't seem to fond the answer.
  40. Anyone tested 4.9's fwhp?
  41. Could a catalytic convertor go bad in 2 years?
  42. Switched Oil and now it clatters!!!!!
  43. Fuel Injectors help!!!
  44. 1990 Allante Engine
  45. ISC motor ratchets after shutoff
  46. BBOB or ANYONE---A LITTLE HELP!!
  47. Need help with fuel system
  48. Got a VSS code on my 1990 Deville!!
  49. fuel injection parts
  50. Does the 4.9 really need 91 octane????
  51. When do u change the O2 sensors?
  52. 90 Deville hesitation after driving for hours
  53. 4.9 liter oil use?
  54. 91 DeVille--Problems to Watch For
  55. Failed Smog Test Please Help!!!
  56. Why would the NOx increase after my EGR is hooked up?
  57. 90 Deville runs like crap
  58. miss on the 4.5litre?
  59. Transmission service
  60. 91 caddy deville runs wrong
  61. 4.1 Serpentine Belt Frozen
  62. 'hidden Warranties'
  63. Please Help Me!!!
  64. high RPM, ISC not the problem?
  65. What is the Top mph a 4.9 can hit before it cuts off?
  66. what perfomance mods,if any???
  67. new problem arising?
  68. 4.9 Questions...
  69. 89 deville runs rough intermittantly??
  70. Injector Failure At 43,000 Miles???
  71. 4.1 Engine seems to be running rich
  72. 91 DeVille wants to go like crazy! Whats up?
  73. 4.1 Clutch Fan hooped?
  74. spark plug torque for 1991 4.9
  75. 93 Deville Werid Noise
  76. '90 Seville with 4.5 Knocks when warm
  77. Are the GM replacemnt 4100's a better design ?
  78. HT 4100 flooding out badly. Warm or cold
  79. fuel system problem...i think
  80. 85 eldo
  81. 94 deville loss of power
  82. where does the "gas mileage" sensor collect the data?
  83. leaking "fuel filter "??
  84. Dead mouse in the heater/ AC box HELP !!!
  85. 4.9 head gaskets fel-pro vs GM
  86. Fuel Guage problem
  87. help! i think i blew it. 4.5 hg
  88. 1988 4.5l fwd eats up distributor gears
  89. 88 eldo codes but why
  90. Source for sleeves 4.1 4.5 etc
  91. 85 FWB stalled out and won't start
  92. Should I buy it, guys?
  93. carb removal help urgent
  94. torx
  95. NEED HELP -Stalled 92 Seville STS, won't start
  96. Need help quick please 4.9 deville
  97. 1st post: Eldorado dies 3 miles after I bought it...HELP!
  98. 1990 Deville idle issue
  99. no rad fans 90 deville 4.5
  100. SERVICE SOON light comes on random, but serviced at dealer last year.
  101. Oil pressure in HT4100?
  102. MAP reading while applying brake
  103. tranny jumping in and out of gears
  104. Roaring Rattling Deville
  105. is my engine shot????
  106. 1990 cadillac sedan deville
  107. 4.9 Manifolds????
  108. 4.5L replacement for 4.1 in 84 eldo/seville?
  109. Rebuild 4.9L thread?
  110. 4.9 pushrod length/width?
  111. 4.1 engine questions
  112. Exaust question
  113. Low RPM ENgine Rough
  114. removing oil pan from 92 DeVille
  115. Steel Rocker Arm Supports
  116. 91 Eldorado Performance Tips
  117. A/C Leak
  118. TPS wiring Question.
  119. heres where im leaking coolant *pics
  120. 1991 SedanDeVille - "Service Engine Soon" Light
  121. The Surge/Stumble Revisited
  122. intermittent miss 4.5 1990 deville
  123. Adjusting the TPS - Right or Wrong?
  124. Whats up guys! I really need your help!!
  125. GM Coolant Pellets Do Not Work....
  126. Went through my codes today and...(help)
  127. 89 sedan deville hesitation problem--HELP!
  128. help with code please
  129. 4100 1990 deville
  130. Newbie here with a warning about Autozones (Wells) TPS
  131. Blown Head Gaskets 4.5 or 4.9 V8
  132. Red Line Water Wetter ?
  133. 4.5 Cooling System Additive
  134. 1987 Cadillac Sedan Deville
  135. My 1986 Cadi engine revs continually
  136. Hey, can anyone help me with this 4.9?
  137. 20w50 5W30 oil,not for use in a 4.9 liter engine?
  138. DeVille (DEVIL?) 91 *extreme* power loss.
  139. 92 Deville will not run with MAP sensor connected
  140. 85 Fleetwood 4.1 (FWD) NO START
  141. How to detect a misfiring cylinder....
  142. Why does '90 4.5L not drop to idle till almost stopped?
  143. start,start,no start
  144. Coolant Fan manual override switch
  145. Finally have my Eldorado back w/extra hp!!
  146. Do you have to change all 8 injectors on a 1992 4.9?
  147. Car overheat real bad when sitting still for 15 minute
  148. Changed Coolant Today!
  149. 4100 rwd deville swap
  150. '89 4.5L, 200k miles, oil leak behind waterpump?
  151. engine code e47
  152. crankcase pressure
  153. codes
  154. What grade of fuel should I use?
  155. Vibration in 1992 4.9!?!?!?!?
  156. engine races when started cold
  157. Look inside the 104k 4.9.... and a new valve cover :)
  158. need more hp!!!!!!
  159. 87 Seville 4.1 smokeing, don't know why.
  160. Rocker arm support installation question.
  161. What happened to my post?
  162. 4.5L timing?
  163. 4.9 Custom Header - Gauging Interest
  164. 95 Deville PO39 code need help!!!!!!!!!
  165. Converter Inlet Size??
  166. throttle switch short
  167. 4100 sleeve selection (rehash?)
  168. Oil change and now the light wont go out.
  169. Is it hard to change the coolant on the 4.1?
  170. Performance parts for caddy 4.9 engine?
  171. 4.9 Custom Air intake
  172. Radiator cap PSI for 4.9
  173. Timing 94 Deville
  174. rough running after warm up
  175. Nitrous in 4.9
  176. Stripped Head Bolt Threads
  177. 83 coupe air pump
  178. Removing cat-converter...good idea or no?
  179. URGENT!! Muffler?
  180. Finally summers here, first problem..brakes stuck
  181. leaking deville 4100 need bandaid
  182. Is 104C too hot for a 4.9L 1994 Deville?
  183. Is There Such A Thing As A Starter Motor Overheating?
  184. Illumina /Bbob/Nodh and other Tech types
  185. Possible Seville Engine Swap
  186. E39 Code
  187. 4.5 Performance?
  188. ht4100 bars leaks crap help
  189. 1990 4.5 needs new injectors
  190. My buddy thought the 4.9 was like 250hp!!
  191. Engine STILL missing (intermittant), tons of work done so far--HELP!!!
  192. rumble in the 'ville
  193. My Caddy won't start.
  194. Code 19....1984 DeVille
  195. Longevity of a 4.9L Is 150K too many miles?
  196. What are the common problem areas with 4.9Ls on 1994 Deville?
  197. Knock
  198. 4.9 straightpipes
  199. how common are coolant leaks in 4.9
  200. transmission trouble
  201. 1985 HT 4100 Cast Iron Block & Head???
  202. 93 Deville Idle Sticking
  203. Stuck with a HT4100? I have the solution!
  204. 4.9 problems
  205. Tranny Cooler Part Numbers:92 ETC
  206. 85 HT4100 Swap
  207. Engine knocking
  208. Oil leak (Bbob)
  209. Ht4100 Idle
  210. Any advice on a HT4100 while I'm fixing the timing chain/gears?
  211. dumbass in need of help
  212. HT4100 Idle speed (warmed up)?
  213. Transmission lags the downshifts + sometimes upshifts after high speed drive
  214. Changing Engine Coolant
  215. P085 ....... Idle Throttle Angle Too High
  216. serpantine belt problem, 92 deville
  217. Are You Sure Rotella Is good for the 4.9?
  218. antifreeze in oil please help bbob and all
  219. 89 STS torques to one side
  220. 88 eldorado 4.5 help please
  221. 4.9 water pump bolting question?
  222. 1992 Cadillac Sedan DeVille O2 Sensors
  223. 90 Eldo w/4.5 PROJECT CAR - Advice Desired
  224. fuel injector question
  225. It's the smog pump
  226. Removing/Reinstalling Accelerator Pedal
  227. Risks of Ethanol?
  228. 4.1 compression
  229. replaced water pump/wont start
  230. proper oil for 88 sedan deville
  231. Warmed up engine FLOWMASTER 40series DELTA FLOW clip
  232. Brake cleaner - does it miff the engine gaskets?
  233. 94 Deville 4.9L ...P030 and some other codes....
  234. New to the forum....
  235. Who sells a good CA legal catalytic conv. ?? - We have very strict Smog tests here.
  236. Are these holes in the airfilter housing supposed to have something... '84 HT4100 TBI
  237. New Deville Clips
  238. 84 cadillac seville chargeing problem
  239. 1992 sedan deville head gaskets?
  240. 92 Deville Starter heat shied
  241. 4.5 intake gasket
  242. VSS location?
  243. How do you Remove&Clean Throttle Body, engines too big to see back there.
  244. No More Poop On Coupe ! Yea !
  245. 88 eldo 4.5 running temp and code E027 ?'s
  246. 93 Seville radiator fan
  247. PO41 No Cam reference Signal - broke down on trip
  248. Is the exhaust layout identical per the 1983 and 1984 DeVille 4.1 V8
  249. Aftermarket Cat
  250. Why doesn't an '84 DeVille F'ING show up on most of the online catalogs?