: HT4100 4.1, 4.5, 4.9



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