: HT4100 4.1, 4.5, 4.9



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  1. changing spark plugs
  2. A few qestions regarding timing, etc.
  3. 1990 feleetwood codes on air control panel
  4. 93 seville sls idle problems
  5. 86 Cadillac Deville Timing
  6. 85 FWB W/ 4100 Hesitation...
  7. 89 Deville, What would cause this?
  8. THROTTLE PROBLEMS 95 DeVILLE 4.9
  9. Can't seem to fond the answer.
  10. Anyone tested 4.9's fwhp?
  11. Could a catalytic convertor go bad in 2 years?
  12. Switched Oil and now it clatters!!!!!
  13. Fuel Injectors help!!!
  14. 1990 Allante Engine
  15. ISC motor ratchets after shutoff
  16. BBOB or ANYONE---A LITTLE HELP!!
  17. Need help with fuel system
  18. Got a VSS code on my 1990 Deville!!
  19. fuel injection parts
  20. Does the 4.9 really need 91 octane????
  21. When do u change the O2 sensors?
  22. 90 Deville hesitation after driving for hours
  23. 4.9 liter oil use?
  24. 91 DeVille--Problems to Watch For
  25. Failed Smog Test Please Help!!!
  26. Why would the NOx increase after my EGR is hooked up?
  27. 90 Deville runs like crap
  28. miss on the 4.5litre?
  29. Transmission service
  30. 91 caddy deville runs wrong
  31. 4.1 Serpentine Belt Frozen
  32. 'hidden Warranties'
  33. Please Help Me!!!
  34. high RPM, ISC not the problem?
  35. What is the Top mph a 4.9 can hit before it cuts off?
  36. what perfomance mods,if any???
  37. new problem arising?
  38. 4.9 Questions...
  39. 89 deville runs rough intermittantly??
  40. Injector Failure At 43,000 Miles???
  41. 4.1 Engine seems to be running rich
  42. 91 DeVille wants to go like crazy! Whats up?
  43. 4.1 Clutch Fan hooped?
  44. spark plug torque for 1991 4.9
  45. 93 Deville Werid Noise
  46. '90 Seville with 4.5 Knocks when warm
  47. Are the GM replacemnt 4100's a better design ?
  48. HT 4100 flooding out badly. Warm or cold
  49. fuel system problem...i think
  50. 85 eldo
  51. 94 deville loss of power
  52. where does the "gas mileage" sensor collect the data?
  53. leaking "fuel filter "??
  54. Dead mouse in the heater/ AC box HELP !!!
  55. 4.9 head gaskets fel-pro vs GM
  56. Fuel Guage problem
  57. help! i think i blew it. 4.5 hg
  58. 1988 4.5l fwd eats up distributor gears
  59. 88 eldo codes but why
  60. Source for sleeves 4.1 4.5 etc
  61. 85 FWB stalled out and won't start
  62. Should I buy it, guys?
  63. carb removal help urgent
  64. torx
  65. NEED HELP -Stalled 92 Seville STS, won't start
  66. Need help quick please 4.9 deville
  67. 1st post: Eldorado dies 3 miles after I bought it...HELP!
  68. 1990 Deville idle issue
  69. no rad fans 90 deville 4.5
  70. SERVICE SOON light comes on random, but serviced at dealer last year.
  71. Oil pressure in HT4100?
  72. MAP reading while applying brake
  73. tranny jumping in and out of gears
  74. Roaring Rattling Deville
  75. is my engine shot????
  76. 1990 cadillac sedan deville
  77. 4.9 Manifolds????
  78. 4.5L replacement for 4.1 in 84 eldo/seville?
  79. Rebuild 4.9L thread?
  80. 4.9 pushrod length/width?
  81. 4.1 engine questions
  82. Exaust question
  83. Low RPM ENgine Rough
  84. removing oil pan from 92 DeVille
  85. Steel Rocker Arm Supports
  86. 91 Eldorado Performance Tips
  87. A/C Leak
  88. TPS wiring Question.
  89. heres where im leaking coolant *pics
  90. 1991 SedanDeVille - "Service Engine Soon" Light
  91. The Surge/Stumble Revisited
  92. intermittent miss 4.5 1990 deville
  93. Adjusting the TPS - Right or Wrong?
  94. Whats up guys! I really need your help!!
  95. GM Coolant Pellets Do Not Work....
  96. Went through my codes today and...(help)
  97. 89 sedan deville hesitation problem--HELP!
  98. help with code please
  99. 4100 1990 deville
  100. Newbie here with a warning about Autozones (Wells) TPS
  101. Blown Head Gaskets 4.5 or 4.9 V8
  102. Red Line Water Wetter ?
  103. 4.5 Cooling System Additive
  104. 1987 Cadillac Sedan Deville
  105. My 1986 Cadi engine revs continually
  106. Hey, can anyone help me with this 4.9?
  107. 20w50 5W30 oil,not for use in a 4.9 liter engine?
  108. DeVille (DEVIL?) 91 *extreme* power loss.
  109. 92 Deville will not run with MAP sensor connected
  110. 85 Fleetwood 4.1 (FWD) NO START
  111. How to detect a misfiring cylinder....
  112. Why does '90 4.5L not drop to idle till almost stopped?
  113. start,start,no start
  114. Coolant Fan manual override switch
  115. Finally have my Eldorado back w/extra hp!!
  116. Do you have to change all 8 injectors on a 1992 4.9?
  117. Car overheat real bad when sitting still for 15 minute
  118. Changed Coolant Today!
  119. 4100 rwd deville swap
  120. '89 4.5L, 200k miles, oil leak behind waterpump?
  121. engine code e47
  122. crankcase pressure
  123. codes
  124. What grade of fuel should I use?
  125. Vibration in 1992 4.9!?!?!?!?
  126. engine races when started cold
  127. Look inside the 104k 4.9.... and a new valve cover :)
  128. need more hp!!!!!!
  129. 87 Seville 4.1 smokeing, don't know why.
  130. Rocker arm support installation question.
  131. What happened to my post?
  132. 4.5L timing?
  133. 4.9 Custom Header - Gauging Interest
  134. 95 Deville PO39 code need help!!!!!!!!!
  135. Converter Inlet Size??
  136. throttle switch short
  137. 4100 sleeve selection (rehash?)
  138. Oil change and now the light wont go out.
  139. Is it hard to change the coolant on the 4.1?
  140. Performance parts for caddy 4.9 engine?
  141. 4.9 Custom Air intake
  142. Radiator cap PSI for 4.9
  143. Timing 94 Deville
  144. rough running after warm up
  145. Nitrous in 4.9
  146. Stripped Head Bolt Threads
  147. 83 coupe air pump
  148. Removing cat-converter...good idea or no?
  149. URGENT!! Muffler?
  150. Finally summers here, first problem..brakes stuck
  151. leaking deville 4100 need bandaid
  152. Is 104C too hot for a 4.9L 1994 Deville?
  153. Is There Such A Thing As A Starter Motor Overheating?
  154. Illumina /Bbob/Nodh and other Tech types
  155. Possible Seville Engine Swap
  156. E39 Code
  157. 4.5 Performance?
  158. ht4100 bars leaks crap help
  159. 1990 4.5 needs new injectors
  160. My buddy thought the 4.9 was like 250hp!!
  161. Engine STILL missing (intermittant), tons of work done so far--HELP!!!
  162. rumble in the 'ville
  163. My Caddy won't start.
  164. Code 19....1984 DeVille
  165. Longevity of a 4.9L Is 150K too many miles?
  166. What are the common problem areas with 4.9Ls on 1994 Deville?
  167. Knock
  168. 4.9 straightpipes
  169. how common are coolant leaks in 4.9
  170. transmission trouble
  171. 1985 HT 4100 Cast Iron Block & Head???
  172. 93 Deville Idle Sticking
  173. Stuck with a HT4100? I have the solution!
  174. 4.9 problems
  175. Tranny Cooler Part Numbers:92 ETC
  176. 85 HT4100 Swap
  177. Engine knocking
  178. Oil leak (Bbob)
  179. Ht4100 Idle
  180. Any advice on a HT4100 while I'm fixing the timing chain/gears?
  181. dumbass in need of help
  182. HT4100 Idle speed (warmed up)?
  183. Transmission lags the downshifts + sometimes upshifts after high speed drive
  184. Changing Engine Coolant
  185. P085 ....... Idle Throttle Angle Too High
  186. serpantine belt problem, 92 deville
  187. Are You Sure Rotella Is good for the 4.9?
  188. antifreeze in oil please help bbob and all
  189. 89 STS torques to one side
  190. 88 eldorado 4.5 help please
  191. 4.9 water pump bolting question?
  192. 1992 Cadillac Sedan DeVille O2 Sensors
  193. 90 Eldo w/4.5 PROJECT CAR - Advice Desired
  194. fuel injector question
  195. It's the smog pump
  196. Removing/Reinstalling Accelerator Pedal
  197. Risks of Ethanol?
  198. 4.1 compression
  199. replaced water pump/wont start
  200. proper oil for 88 sedan deville
  201. Warmed up engine FLOWMASTER 40series DELTA FLOW clip
  202. Brake cleaner - does it miff the engine gaskets?
  203. 94 Deville 4.9L ...P030 and some other codes....
  204. New to the forum....
  205. Who sells a good CA legal catalytic conv. ?? - We have very strict Smog tests here.
  206. Are these holes in the airfilter housing supposed to have something... '84 HT4100 TBI
  207. New Deville Clips
  208. 84 cadillac seville chargeing problem
  209. 1992 sedan deville head gaskets?
  210. 92 Deville Starter heat shied
  211. 4.5 intake gasket
  212. VSS location?
  213. How do you Remove&Clean Throttle Body, engines too big to see back there.
  214. No More Poop On Coupe ! Yea !
  215. 88 eldo 4.5 running temp and code E027 ?'s
  216. 93 Seville radiator fan
  217. PO41 No Cam reference Signal - broke down on trip
  218. Is the exhaust layout identical per the 1983 and 1984 DeVille 4.1 V8
  219. Aftermarket Cat
  220. Why doesn't an '84 DeVille F'ING show up on most of the online catalogs?
  221. What's the most universal oil filter wrench you have used?
  222. 91' deville
  223. 90 deville water pump?
  224. time for a tune up.. whats involved.
  225. Oil Pressure Light just came on - 4.1 V-8!
  226. CAN you change oil filter withOUT draining oil pan?
  227. 83 coupe 4100 ( 4.1) injector problems
  228. Slow Battery Drain
  229. 4.5 liter misfiring on acceleration, rough idle
  230. HT4100 EGR schematics needed to figure out smog issue, BAD F'ING NEWS
  231. Change of Plans! I'm not supercharging anything...
  232. torque convertors for teh 4t60
  233. BARO on 4.9?
  234. Knocking/Rattling From Engine
  235. injector duty cycle
  236. Dangers of flsuhing HT4100 with motor Flush and Supertech oil.
  237. Fuel pressure
  238. Newbie needs help with 87 seville 4.1L
  239. Can A 4.1 Trans be Used in a Long?...
  240. anyone know????
  241. 4.1 wiring from distributor to plugs HELP ASAP
  242. 84 Eldorado 4.1 V8 (HT4100) "E" engine, M57 tranny, Noise from lower end
  243. remove power steering pulley
  244. coolant temperature
  245. GM Reliability Testing?
  246. 84 SDV RWD 4.1 Intake gasket
  247. Is single 3" exhaust too big for a 4.1L @ 200 HP?
  248. Fuel Injector Replacement
  249. HELP!! 91 Eldo stalling problem
  250. used E C M ... from junk yard