: HT4100 4.1, 4.5, 4.9



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  1. 85 Fleetwood FWD Engine Trouble
  2. WTB: ASAP 4.9L Front Exhaust Manifold
  3. 91 Deville 4.9 rough idle
  4. My 86 SedanDeville is running rough above 55mph
  5. Has anyone converted to the electrocruise?
  6. '86 DeVille HT4100 knock - please help :-(
  7. Engine noise while in park?
  8. 4.9 with poor gas mileage. just changed o2
  9. Low Oil Pressure
  10. Changing oil pan gasket
  11. Looking for a couple of VSS wires - '91 Deville
  12. the return of E48/E49
  13. 84' seville is a mess!
  14. EGR Vavle
  15. engine swap
  16. 92deville, idle(rough) Injector service??
  17. CAM sensor
  18. supercharging the 4.9
  19. Please help me with my 4.1..or give me a mechanic who can
  20. How to remove/replace rattling CAT
  21. pellets and 4.5 engine
  22. ohm reading for injectors on 4.5
  23. ? acceptable ohm resistance for injectors
  24. Intermittent Stalling
  25. 4.5 EGR vs. 4.9 EGR
  26. 4.5 engine
  27. Pushrod?
  28. Got new codes today.
  29. 90 Deville Dies while driving
  30. 84 4.1 Swap To 305/350 ?
  31. new to the forum, need a little help (90 4.5l pfi)
  32. Air Pump Seized (4.1 engine)
  33. OBD I codes for 4.x Engines
  34. junked 4.1 installed chevy 5.0 runs great
  35. I replaced my tps and isc but it stall every now an then
  36. Engine running rough
  37. 85 cadillac seville
  38. '93 4.9L Spark Plugs and Wires
  39. TCC location, please Help!!
  40. White smoke still coming from exhaust?
  41. Starter Disabled "Anti-Theft"
  42. need source for 99 cadillac service manuals
  43. HT4100 coolant issue.
  44. 92 (4.9L) stalling
  45. Cars starting to run a little better!
  46. Oil Overfill Cause Engine Damage?
  47. 4T60E Trans Sport Mode???
  48. can't advance computer beyond PCM?
  49. Turbocharge the 4.9L?
  50. Transmission Wont Shift
  51. discontinued?
  52. Replaced Injectors.. Still no action in Cyls 3 and 4?
  53. Edelbrock engine....
  54. Rough Idle
  55. A/c
  56. Speedometer problems......
  57. 1985 Seville HELP NEEDED
  58. Weird A/C air condition problem
  59. Size of O-rings in fuel line
  60. Fuel Filter Location.
  61. 94 Deville Boils Over after Engine Off
  62. Dexcool in a 4.9L???
  63. 1992 4.9 goes to open loop at HWY speeds.
  64. Bad Engines?
  65. fuel pump location (84 4100)
  66. car wont start (84 4100)
  67. Overhauling and Modifying a 1982 HT4100
  68. 92 deville bad head gasket selling?
  69. 92 deville please help
  70. New 4.9 problem, horrific idle, backfiring
  71. Oil Cooler...
  72. 83 eldorado with new reman engine and tranny timing / ping probs
  73. 4.1 to 4.7
  74. Car giving me fits
  75. 89 Seville idles at 2200
  76. help with codes
  77. 4.5 cranks but no start
  78. 4.9L Stalling out
  79. 'Service Engine Soon' Light on my 4.9 DeVille - Any ideas?
  80. Pistons for a 4.5L and 4.9L the same???
  81. 4.9 distributor help
  82. umm...help please!
  83. 84 coupe deville codes
  84. engine swap
  85. 1990 deville starter replacement
  86. TPS Enhancer
  87. What kind of spark plugs for the HT4100?
  88. Vehicle Data List, Can you spot the problem?
  89. changing belt
  90. 92 Deville - OIL IN COOLANT
  91. 94' sedan deville woes Heeellllllp.
  92. What are the troubleshooting steps for injectors/plugs/wires?
  93. 4.9 Engine Oil Cooler Line replacement
  94. INTERMITTANT "Missing" and rough running/idle
  95. Ppplllleeeeaaassseee Help!!!
  96. ok so maybe its the alternator
  97. engine coolant supplement
  98. Ford SVO Injectors, Can i use them?
  99. '85 Deville Engine Temp Fan Light
  100. If I disconnect the battery.....
  101. 4.9L distributor questions
  102. How to go into different parts of OBD?
  103. gas smell?
  104. 92 Deville Surging during idle!
  105. symptoms of a bad cat?
  106. ebay purchase question?
  107. Flowmaster 80 Series-I LOVE IT!
  108. Over Heating
  109. high throttle on start. Code 26
  110. Fram Air Hog-Test
  111. 4.9L Roller Rockers?
  112. '86 Fleetwood 75 FWD
  113. TPS Adjustment for 85 4.1 (RWD)
  114. where is the thing???!!!!!!????
  115. radiator removal and installation
  116. 92 deville "set timing mode"????
  117. Ahh!!!
  118. What to do to make car stop running rich?
  119. 92 deville clicking after shut off???
  120. Spark Knock, Continued....
  121. Throttle Body and Air CLeaner Housing
  122. Engine Dies...
  123. Quick PCV question
  124. reman Ht 4100 is in looking for reman tranny advice, sources, install, fluid etc.
  125. bogging 4.9 in a Fiero
  126. Hi - 89 Deville 4.5 Liter V8 in 84 Pontiac Fiero
  127. Overheat Problem
  128. '89 DeVille, ISP motor bounces
  129. How to tell if water pump is going out?
  130. Overheating Badly
  131. MAT Sensor location...
  132. Serpentine belt for 4.9 ('91 Deville)?
  133. sputtering
  134. Radiator leak
  135. 15 Amp ERLS blowing
  136. 94 deville fuel delivery prob. HELP!
  137. wtf
  138. loud tapping noise in the left bank sounds like from top end
  139. swap engine
  140. eric
  141. replacing a broke pulley
  142. Jrb
  143. 87 eldorado 4.1L in an 84 fiero - SES light ON
  144. so many codes!
  145. 91 Deville 4.9 with no power- Need Help
  146. 0.07 volts for ground???
  147. 87 Eldorado 4.1L
  148. type of oil
  149. ISC motor idle speed
  150. how do i remove the throttle body?
  151. got my 4.1 reman in but it wont fire up
  152. High RPM on Motor Start - 4.9
  153. 4.5 V8 Water in Oil
  154. 88 4.5 V8 Water In Oil
  155. Aftermarket 4100 Parts?
  156. coolant leak from timing cover?
  157. Hammer -vs- Fussy Starter
  158. bad thermostats, hopefully?
  159. 4.1 TPS sensor
  160. Strange engine/ecu problem
  161. Best motor oil for 4.9?
  162. 4.5 Coolant Problems, Leaking Fluid - but from where?
  163. simple 4.9 questions
  164. 4.9L Firing order + Cylinder location HERE!
  165. 4.1 Rough Idle
  166. Best (Worst) Air Filters to Use
  167. 4.9L performance upgrades?
  168. 4.1 to 4.5 swap
  169. How much for New Head Gaskets?
  170. new mat and coolent sensors
  171. rough idle and sputtering
  172. 4.1 exhaust manifold
  173. 4.9 Head Gasket
  174. problem with "service engine soon"
  175. Advance timing on 4.9
  176. What MPG for 87 Eldorado, 4.1?
  177. E048 EGR fault code how to fix?
  178. 4.9 And The Gas Mileage Sucks!!!
  179. Any way to disable the ses light?
  180. 95 deville tranny question
  181. 92' dies then restarts by its self
  182. ECM pinouts
  183. Dead 89 deville engine
  184. Going to be a long weekend
  185. A few questions for the Caddy Experts 4.9L
  186. old radiator cap problematic?
  187. 4.9 ltr
  188. 4.9 reliability :P
  189. Help With Code
  190. confused
  191. 4.9 Ltr Timing Belt?
  192. Drive ADL switch?
  193. spark plug question
  194. code ro15
  195. 92 Fleetwood 4.9 hesitation/code help
  196. 4.5 no start, no life. sorta familiar
  197. Yea another code ??
  198. 4.1 Operating Temperatures
  199. coolant leak
  200. A few questions regarding the 4.9
  201. code questions please...
  202. Throttle body bolt stripped out of intake manifold
  203. steering wheel will lock up and car cut off
  204. Help with 89 Sedan deVille codes...
  205. how good are the bottom ends on the 4.9?
  206. E98 code - help!!??
  207. 4.9L northstar
  208. Need help ... engine kicks, accelerates/revs itself
  209. '89 DeVille a/c not working
  210. HT4100 Stalling
  211. 4.9 oil consumption
  212. ht 4100 change over to 350 chevy
  213. Will 4.9 heads fit on a 4.1 block?
  214. Thinking about getting a new coil
  215. 87 Cadillac Seville ,4.1 with blown head gasket
  216. Hi. I need lots of help concerning the 4.9L. Thanks.
  217. timing a 4.5
  218. pulley bearing? serpentine belt not moving
  219. Hub on crankshaft
  220. Tackling Motor mount Replacement-92 Seville(4.9)
  221. 1. Diag Codes 2. Engine Stall
  222. squeek squeek .my speedo cable i think
  223. coolant in oil in my new motor
  224. coolant in oil
  225. Reconnecting Spark Plug Wires - 4.9L
  226. rough poor idle on 91 Seville STS 4.9 ideas?
  227. bbob???
  228. Better MPG with 87 Octane
  229. Preliminary tune-up
  230. car from hell
  231. 1988 Coupe Deville 4.5 ECM problem
  232. Please Help!!!
  233. Well, it cranked but...
  234. 4.9 heads on a 4.5
  235. 1990 fleetwood 4.5 fuel filter and thermostat location????
  236. 4.1 V6 and 4.1 V8
  237. Does the bars leak that comes in the gray bottle do the same thing as the tablets?
  238. 93 SDV trans question
  239. can anyone shine some light on me
  240. What's wrong with my 4100?
  241. What are some tricks to make the 4100 last a long time?
  242. hurt caddy
  243. torque specs for belt tensioner pulley
  244. Need trouble codes for '83 HT-4100 Eldo
  245. 93 loud knocking within engine, while in park
  246. ht4100
  247. I bought my muffler
  248. Valve belts?
  249. gas leak
  250. Just got 3 codes, need some help!