: HT4100 4.1, 4.5, 4.9



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