: HT4100 4.1, 4.5, 4.9



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