: HT4100 4.1, 4.5, 4.9



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  1. 92 eldorado E0085 dtc help pls
  2. Engine Rattle
  3. 4.1 chrome?!
  4. WHat Buttons Do I hit to CHeck the Error COdes On My 93 4.9?
  5. 4.9 off idle stumble
  6. HELP! Would a bad EGR valve cause my car to run rough on the highway?
  7. White Smoke
  8. Radiator Leak
  9. 4.5 Vs 4.9... Compairable?
  10. ROUGH idle , strange code .
  11. 85 Fleetwood FWD Engine Trouble
  12. WTB: ASAP 4.9L Front Exhaust Manifold
  13. 91 Deville 4.9 rough idle
  14. My 86 SedanDeville is running rough above 55mph
  15. Has anyone converted to the electrocruise?
  16. '86 DeVille HT4100 knock - please help :-(
  17. Engine noise while in park?
  18. 4.9 with poor gas mileage. just changed o2
  19. Low Oil Pressure
  20. Changing oil pan gasket
  21. Looking for a couple of VSS wires - '91 Deville
  22. the return of E48/E49
  23. 84' seville is a mess!
  24. EGR Vavle
  25. engine swap
  26. 92deville, idle(rough) Injector service??
  27. CAM sensor
  28. supercharging the 4.9
  29. Please help me with my 4.1..or give me a mechanic who can
  30. How to remove/replace rattling CAT
  31. pellets and 4.5 engine
  32. ohm reading for injectors on 4.5
  33. ? acceptable ohm resistance for injectors
  34. Intermittent Stalling
  35. 4.5 EGR vs. 4.9 EGR
  36. 4.5 engine
  37. Pushrod?
  38. Got new codes today.
  39. 90 Deville Dies while driving
  40. 84 4.1 Swap To 305/350 ?
  41. new to the forum, need a little help (90 4.5l pfi)
  42. Air Pump Seized (4.1 engine)
  43. OBD I codes for 4.x Engines
  44. junked 4.1 installed chevy 5.0 runs great
  45. I replaced my tps and isc but it stall every now an then
  46. Engine running rough
  47. 85 cadillac seville
  48. '93 4.9L Spark Plugs and Wires
  49. TCC location, please Help!!
  50. White smoke still coming from exhaust?
  51. Starter Disabled "Anti-Theft"
  52. need source for 99 cadillac service manuals
  53. HT4100 coolant issue.
  54. 92 (4.9L) stalling
  55. Cars starting to run a little better!
  56. Oil Overfill Cause Engine Damage?
  57. 4T60E Trans Sport Mode???
  58. can't advance computer beyond PCM?
  59. Turbocharge the 4.9L?
  60. Transmission Wont Shift
  61. discontinued?
  62. Replaced Injectors.. Still no action in Cyls 3 and 4?
  63. Edelbrock engine....
  64. Rough Idle
  65. A/c
  66. Speedometer problems......
  67. 1985 Seville HELP NEEDED
  68. Weird A/C air condition problem
  69. Size of O-rings in fuel line
  70. Fuel Filter Location.
  71. 94 Deville Boils Over after Engine Off
  72. Dexcool in a 4.9L???
  73. 1992 4.9 goes to open loop at HWY speeds.
  74. Bad Engines?
  75. fuel pump location (84 4100)
  76. car wont start (84 4100)
  77. Overhauling and Modifying a 1982 HT4100
  78. 92 deville bad head gasket selling?
  79. 92 deville please help
  80. New 4.9 problem, horrific idle, backfiring
  81. Oil Cooler...
  82. 83 eldorado with new reman engine and tranny timing / ping probs
  83. 4.1 to 4.7
  84. Car giving me fits
  85. 89 Seville idles at 2200
  86. help with codes
  87. 4.5 cranks but no start
  88. 4.9L Stalling out
  89. 'Service Engine Soon' Light on my 4.9 DeVille - Any ideas?
  90. Pistons for a 4.5L and 4.9L the same???
  91. 4.9 distributor help
  92. umm...help please!
  93. 84 coupe deville codes
  94. engine swap
  95. 1990 deville starter replacement
  96. TPS Enhancer
  97. What kind of spark plugs for the HT4100?
  98. Vehicle Data List, Can you spot the problem?
  99. changing belt
  100. 92 Deville - OIL IN COOLANT
  101. 94' sedan deville woes Heeellllllp.
  102. What are the troubleshooting steps for injectors/plugs/wires?
  103. 4.9 Engine Oil Cooler Line replacement
  104. INTERMITTANT "Missing" and rough running/idle
  105. Ppplllleeeeaaassseee Help!!!
  106. ok so maybe its the alternator
  107. engine coolant supplement
  108. Ford SVO Injectors, Can i use them?
  109. '85 Deville Engine Temp Fan Light
  110. If I disconnect the battery.....
  111. 4.9L distributor questions
  112. How to go into different parts of OBD?
  113. gas smell?
  114. 92 Deville Surging during idle!
  115. symptoms of a bad cat?
  116. ebay purchase question?
  117. Flowmaster 80 Series-I LOVE IT!
  118. Over Heating
  119. high throttle on start. Code 26
  120. Fram Air Hog-Test
  121. 4.9L Roller Rockers?
  122. '86 Fleetwood 75 FWD
  123. TPS Adjustment for 85 4.1 (RWD)
  124. where is the thing???!!!!!!????
  125. radiator removal and installation
  126. 92 deville "set timing mode"????
  127. Ahh!!!
  128. What to do to make car stop running rich?
  129. 92 deville clicking after shut off???
  130. Spark Knock, Continued....
  131. Throttle Body and Air CLeaner Housing
  132. Engine Dies...
  133. Quick PCV question
  134. reman Ht 4100 is in looking for reman tranny advice, sources, install, fluid etc.
  135. bogging 4.9 in a Fiero
  136. Hi - 89 Deville 4.5 Liter V8 in 84 Pontiac Fiero
  137. Overheat Problem
  138. '89 DeVille, ISP motor bounces
  139. How to tell if water pump is going out?
  140. Overheating Badly
  141. MAT Sensor location...
  142. Serpentine belt for 4.9 ('91 Deville)?
  143. sputtering
  144. Radiator leak
  145. 15 Amp ERLS blowing
  146. 94 deville fuel delivery prob. HELP!
  147. wtf
  148. loud tapping noise in the left bank sounds like from top end
  149. swap engine
  150. eric
  151. replacing a broke pulley
  152. Jrb
  153. 87 eldorado 4.1L in an 84 fiero - SES light ON
  154. so many codes!
  155. 91 Deville 4.9 with no power- Need Help
  156. 0.07 volts for ground???
  157. 87 Eldorado 4.1L
  158. type of oil
  159. ISC motor idle speed
  160. how do i remove the throttle body?
  161. got my 4.1 reman in but it wont fire up
  162. High RPM on Motor Start - 4.9
  163. 4.5 V8 Water in Oil
  164. 88 4.5 V8 Water In Oil
  165. Aftermarket 4100 Parts?
  166. coolant leak from timing cover?
  167. Hammer -vs- Fussy Starter
  168. bad thermostats, hopefully?
  169. 4.1 TPS sensor
  170. Strange engine/ecu problem
  171. Best motor oil for 4.9?
  172. 4.5 Coolant Problems, Leaking Fluid - but from where?
  173. simple 4.9 questions
  174. 4.9L Firing order + Cylinder location HERE!
  175. 4.1 Rough Idle
  176. Best (Worst) Air Filters to Use
  177. 4.9L performance upgrades?
  178. 4.1 to 4.5 swap
  179. How much for New Head Gaskets?
  180. new mat and coolent sensors
  181. rough idle and sputtering
  182. 4.1 exhaust manifold
  183. 4.9 Head Gasket
  184. problem with "service engine soon"
  185. Advance timing on 4.9
  186. What MPG for 87 Eldorado, 4.1?
  187. E048 EGR fault code how to fix?
  188. 4.9 And The Gas Mileage Sucks!!!
  189. Any way to disable the ses light?
  190. 95 deville tranny question
  191. 92' dies then restarts by its self
  192. ECM pinouts
  193. Dead 89 deville engine
  194. Going to be a long weekend
  195. A few questions for the Caddy Experts 4.9L
  196. old radiator cap problematic?
  197. 4.9 ltr
  198. 4.9 reliability :P
  199. Help With Code
  200. confused
  201. 4.9 Ltr Timing Belt?
  202. Drive ADL switch?
  203. spark plug question
  204. code ro15
  205. 92 Fleetwood 4.9 hesitation/code help
  206. 4.5 no start, no life. sorta familiar
  207. Yea another code ??
  208. 4.1 Operating Temperatures
  209. coolant leak
  210. A few questions regarding the 4.9
  211. code questions please...
  212. Throttle body bolt stripped out of intake manifold
  213. steering wheel will lock up and car cut off
  214. Help with 89 Sedan deVille codes...
  215. how good are the bottom ends on the 4.9?
  216. E98 code - help!!??
  217. 4.9L northstar
  218. Need help ... engine kicks, accelerates/revs itself
  219. '89 DeVille a/c not working
  220. HT4100 Stalling
  221. 4.9 oil consumption
  222. ht 4100 change over to 350 chevy
  223. Will 4.9 heads fit on a 4.1 block?
  224. Thinking about getting a new coil
  225. 87 Cadillac Seville ,4.1 with blown head gasket
  226. Hi. I need lots of help concerning the 4.9L. Thanks.
  227. timing a 4.5
  228. pulley bearing? serpentine belt not moving
  229. Hub on crankshaft
  230. Tackling Motor mount Replacement-92 Seville(4.9)
  231. 1. Diag Codes 2. Engine Stall
  232. squeek squeek .my speedo cable i think
  233. coolant in oil in my new motor
  234. coolant in oil
  235. Reconnecting Spark Plug Wires - 4.9L
  236. rough poor idle on 91 Seville STS 4.9 ideas?
  237. bbob???
  238. Better MPG with 87 Octane
  239. Preliminary tune-up
  240. car from hell
  241. 1988 Coupe Deville 4.5 ECM problem
  242. Please Help!!!
  243. Well, it cranked but...
  244. 4.9 heads on a 4.5
  245. 1990 fleetwood 4.5 fuel filter and thermostat location????
  246. 4.1 V6 and 4.1 V8
  247. Does the bars leak that comes in the gray bottle do the same thing as the tablets?
  248. 93 SDV trans question
  249. can anyone shine some light on me
  250. What's wrong with my 4100?