: HT4100 4.1, 4.5, 4.9



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  1. exhaust manifold
  2. 4.5L ECM inputs
  3. Why I hate NTK Oxy Sensors from Now ON.
  4. Coolant pellets/conditoner
  5. Prob with 86 deville sedan with 4.9L *HELP*
  6. Ported vacuum switch--supposed to have a wire connected to it?
  7. 4.9L Aluminum Head project?
  8. Stoneage_caddy I had my car's fuel preasure checked today,have a couple of questions
  9. Anyone running an Auto meter Air/Fuel Ratio meter.
  10. What O2 sensor(s) are you using.
  11. antifreeze for my 85 fleetwoods ht4100
  12. Antifreeze for my HT4100
  13. 1989 Eldorado Biarritz MPG
  14. 1991 deville engine dies when coasting
  15. The Homemade 5 Liter PFI Project .....
  16. 85 seville valve lifters
  17. Blown 4.1 ht in 83 eldorado ?? how to tell ?
  18. Bogging problem
  19. Throttle body problem, help please
  20. I knew I saw it someplace, now where did it go, no not my sanity but close?
  21. 4.5......which sensor is bad?
  22. 4.9 bearing part number or TSB?
  23. Help with HT4100 water pump
  24. which is the better motor
  25. Nitrous Question
  26. 1995 DeVille Idle Fluctuation
  27. issues w/ back pressure?!?
  28. Well the pump is on, but my serpentine belt...what?
  29. 83 Sedan Deville 4100
  30. Its an Invasion 4.9, 5spd Stick Fiero
  31. why I love my 4.5...
  32. 1985 deville coolant and heater core questions.
  33. New member here, and I need some '93 Deville help (water pump installation)
  34. 1990 Allante Bosch fuel injectors/FiveOMotorsports
  35. Cleaning '90 EGR 4.5
  36. Groll Polluter FIXED??????????????????
  37. Where does this fuel line run?
  38. 88 Deville.Tensioner Pulley.
  39. 85 4100 is running rough and hesitating
  40. car will not go past 35mph 82 with a 4.1
  41. Does anyone have a picture or info on the Negative block ground?
  42. EGR Cleaning
  43. Cheap quality Rebuilt transmissions
  44. 4.5 Fast Idle problem
  45. I need a no Yo-Yo shift-kit immediately!! '84 RWD DeVille
  46. 93 Runs rough & loud when wet
  47. Spark Plug Replacement
  48. Fuel Injector Compatiblity
  49. Oil pan gasket
  50. No Spark/ No Start Problem/ Pulling what hair I have left out!
  51. oil change
  52. Accel fuel injectors
  53. Alldata (autozone)????????????????????
  54. A/C Compressor
  55. Help ECM E85
  56. Fuel Pumps on '82-85 HT4100 -- Life span??
  57. Analyzing Fuel Economy
  58. Difference between '82 vs '85 Fuel Injectors on the HT4100????
  59. Oil Theories
  60. Got Injectors? 4.9/4.5
  61. E048
  62. Why Wont This Car Start After I Put In A New Alternator.
  63. '85 Throttle Body in an 82 Eldo???
  64. 4.9 knocking
  65. Hole In Muffler(Recommended Replacement)
  66. 91 DeVille
  67. In reguard to my deville's rough idleing,could it just need an induction service?
  68. Code question.
  69. Plugs for 4.9
  70. 1994 Deville 4.9 (Serpentine Belt) - Save Me From the Junk Yard
  71. Inaccurate gas readout?
  72. 1990 Allante fuel injectors
  73. 4.9 with sleeves?
  74. 4.9 Air Cleaner
  75. Stoneage_caddy my deville is stuttering when idleing,any ideas?
  76. 92 4.9 fleetwood high idle
  77. 1994 4.9L won't pass emissions HCs too high How to fix?
  78. HELLO - I'm seeing an error code 52 - any idea what that means?
  79. 4100 Reliability
  80. 1982 eldorado low oiil pressure light on immediately after oil change??
  81. 82 deville VIBE SOLVED
  82. let the thing blow up??
  83. Low Oil Pressure Light 1982 eldorado
  84. engins problem
  85. radiator blew apart
  86. new to the forum - big problem
  87. Whats the best place to find a replacment 4.9
  88. RE: 82 deville
  89. 4.1 ELDO Hesitation and Stall
  90. 84 4.1 Eldo
  91. Fuel Injectors
  92. Regular gas vs. premium gas
  93. used injectors
  94. 82 deville vibration
  95. '84 Eldo Failed NOx
  96. Wow...26+ MPG in a 3900# vehicle with over 700 lbs of cargo/passengers
  97. Collapsed UPPER Rad Hose!
  98. injectors
  99. 4.9 Froze
  100. 4.1 Giving 3 codes...Need help
  101. Is the 4.9 Under Rated?
  102. I need a water pump have a couple of questions.
  103. 4.1 v6, 4.1 v8-- What's the differance?
  104. Dip Stick Tube
  105. 85 Fleetwood Brougham W/ 4100 -- No Start...
  106. Open or closed deck block
  107. Emission Results fine in set timing mode?
  108. A new problem...
  109. 4.9 Dead - How easy to swap in a 4.5?
  110. need some help
  111. What are common issues with the 4.9?
  112. injector part number
  113. Overheating not block or head 83 Brougham anyone know whats wrong?
  114. changing spark plugs
  115. A few qestions regarding timing, etc.
  116. 1990 feleetwood codes on air control panel
  117. 93 seville sls idle problems
  118. 86 Cadillac Deville Timing
  119. 85 FWB W/ 4100 Hesitation...
  120. 89 Deville, What would cause this?
  121. THROTTLE PROBLEMS 95 DeVILLE 4.9
  122. Can't seem to fond the answer.
  123. Anyone tested 4.9's fwhp?
  124. Could a catalytic convertor go bad in 2 years?
  125. Switched Oil and now it clatters!!!!!
  126. Fuel Injectors help!!!
  127. 1990 Allante Engine
  128. ISC motor ratchets after shutoff
  129. BBOB or ANYONE---A LITTLE HELP!!
  130. Need help with fuel system
  131. Got a VSS code on my 1990 Deville!!
  132. fuel injection parts
  133. Does the 4.9 really need 91 octane????
  134. When do u change the O2 sensors?
  135. 90 Deville hesitation after driving for hours
  136. 4.9 liter oil use?
  137. 91 DeVille--Problems to Watch For
  138. Failed Smog Test Please Help!!!
  139. Why would the NOx increase after my EGR is hooked up?
  140. 90 Deville runs like crap
  141. miss on the 4.5litre?
  142. Transmission service
  143. 91 caddy deville runs wrong
  144. 4.1 Serpentine Belt Frozen
  145. 'hidden Warranties'
  146. Please Help Me!!!
  147. high RPM, ISC not the problem?
  148. What is the Top mph a 4.9 can hit before it cuts off?
  149. what perfomance mods,if any???
  150. new problem arising?
  151. 4.9 Questions...
  152. 89 deville runs rough intermittantly??
  153. Injector Failure At 43,000 Miles???
  154. 4.1 Engine seems to be running rich
  155. 91 DeVille wants to go like crazy! Whats up?
  156. 4.1 Clutch Fan hooped?
  157. spark plug torque for 1991 4.9
  158. 93 Deville Werid Noise
  159. '90 Seville with 4.5 Knocks when warm
  160. Are the GM replacemnt 4100's a better design ?
  161. HT 4100 flooding out badly. Warm or cold
  162. fuel system problem...i think
  163. 85 eldo
  164. 94 deville loss of power
  165. where does the "gas mileage" sensor collect the data?
  166. leaking "fuel filter "??
  167. Dead mouse in the heater/ AC box HELP !!!
  168. 4.9 head gaskets fel-pro vs GM
  169. Fuel Guage problem
  170. help! i think i blew it. 4.5 hg
  171. 1988 4.5l fwd eats up distributor gears
  172. 88 eldo codes but why
  173. Source for sleeves 4.1 4.5 etc
  174. 85 FWB stalled out and won't start
  175. Should I buy it, guys?
  176. carb removal help urgent
  177. torx
  178. NEED HELP -Stalled 92 Seville STS, won't start
  179. Need help quick please 4.9 deville
  180. 1st post: Eldorado dies 3 miles after I bought it...HELP!
  181. 1990 Deville idle issue
  182. no rad fans 90 deville 4.5
  183. SERVICE SOON light comes on random, but serviced at dealer last year.
  184. Oil pressure in HT4100?
  185. MAP reading while applying brake
  186. tranny jumping in and out of gears
  187. Roaring Rattling Deville
  188. is my engine shot????
  189. 1990 cadillac sedan deville
  190. 4.9 Manifolds????
  191. 4.5L replacement for 4.1 in 84 eldo/seville?
  192. Rebuild 4.9L thread?
  193. 4.9 pushrod length/width?
  194. 4.1 engine questions
  195. Exaust question
  196. Low RPM ENgine Rough
  197. removing oil pan from 92 DeVille
  198. Steel Rocker Arm Supports
  199. 91 Eldorado Performance Tips
  200. A/C Leak
  201. TPS wiring Question.
  202. heres where im leaking coolant *pics
  203. 1991 SedanDeVille - "Service Engine Soon" Light
  204. The Surge/Stumble Revisited
  205. intermittent miss 4.5 1990 deville
  206. Adjusting the TPS - Right or Wrong?
  207. Whats up guys! I really need your help!!
  208. GM Coolant Pellets Do Not Work....
  209. Went through my codes today and...(help)
  210. 89 sedan deville hesitation problem--HELP!
  211. help with code please
  212. 4100 1990 deville
  213. Newbie here with a warning about Autozones (Wells) TPS
  214. Blown Head Gaskets 4.5 or 4.9 V8
  215. Red Line Water Wetter ?
  216. 4.5 Cooling System Additive
  217. 1987 Cadillac Sedan Deville
  218. My 1986 Cadi engine revs continually
  219. Hey, can anyone help me with this 4.9?
  220. 20w50 5W30 oil,not for use in a 4.9 liter engine?
  221. DeVille (DEVIL?) 91 *extreme* power loss.
  222. 92 Deville will not run with MAP sensor connected
  223. 85 Fleetwood 4.1 (FWD) NO START
  224. How to detect a misfiring cylinder....
  225. Why does '90 4.5L not drop to idle till almost stopped?
  226. start,start,no start
  227. Coolant Fan manual override switch
  228. Finally have my Eldorado back w/extra hp!!
  229. Do you have to change all 8 injectors on a 1992 4.9?
  230. Car overheat real bad when sitting still for 15 minute
  231. Changed Coolant Today!
  232. 4100 rwd deville swap
  233. '89 4.5L, 200k miles, oil leak behind waterpump?
  234. engine code e47
  235. crankcase pressure
  236. codes
  237. What grade of fuel should I use?
  238. Vibration in 1992 4.9!?!?!?!?
  239. engine races when started cold
  240. Look inside the 104k 4.9.... and a new valve cover :)
  241. need more hp!!!!!!
  242. 87 Seville 4.1 smokeing, don't know why.
  243. Rocker arm support installation question.
  244. What happened to my post?
  245. 4.5L timing?
  246. 4.9 Custom Header - Gauging Interest
  247. 95 Deville PO39 code need help!!!!!!!!!
  248. Converter Inlet Size??
  249. throttle switch short
  250. 4100 sleeve selection (rehash?)