: HT4100 4.1, 4.5, 4.9



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  1. Fuel Injector Impedance - High/Low
  2. How to make a wooden Engine Support Fixture J-28467
  3. 4.1 Coolant Leak from block-PLEASE HELP!
  4. 84 coupe deville fan shroud
  5. Mileage and Power loss, again.
  6. 4.9 valve cover gasket
  7. C-v joint
  8. 82' couple 4100 - accelerating by itslef - HELP
  9. Do I have to change coolant?
  10. 1990 4.5L Eldroado Engine running rough
  11. 4.9 speed limiter...
  12. Is this the right stuff, going to attempt this weekend
  13. TPS setting
  14. Tune up on a 89 Deville w/ 4.5
  15. Quick Question
  16. 92 eldorado E0085 dtc help pls
  17. Engine Rattle
  18. 4.1 chrome?!
  19. WHat Buttons Do I hit to CHeck the Error COdes On My 93 4.9?
  20. 4.9 off idle stumble
  21. HELP! Would a bad EGR valve cause my car to run rough on the highway?
  22. White Smoke
  23. Radiator Leak
  24. 4.5 Vs 4.9... Compairable?
  25. ROUGH idle , strange code .
  26. 85 Fleetwood FWD Engine Trouble
  27. WTB: ASAP 4.9L Front Exhaust Manifold
  28. 91 Deville 4.9 rough idle
  29. My 86 SedanDeville is running rough above 55mph
  30. Has anyone converted to the electrocruise?
  31. '86 DeVille HT4100 knock - please help :-(
  32. Engine noise while in park?
  33. 4.9 with poor gas mileage. just changed o2
  34. Low Oil Pressure
  35. Changing oil pan gasket
  36. Looking for a couple of VSS wires - '91 Deville
  37. the return of E48/E49
  38. 84' seville is a mess!
  39. EGR Vavle
  40. engine swap
  41. 92deville, idle(rough) Injector service??
  42. CAM sensor
  43. supercharging the 4.9
  44. Please help me with my 4.1..or give me a mechanic who can
  45. How to remove/replace rattling CAT
  46. pellets and 4.5 engine
  47. ohm reading for injectors on 4.5
  48. ? acceptable ohm resistance for injectors
  49. Intermittent Stalling
  50. 4.5 EGR vs. 4.9 EGR
  51. 4.5 engine
  52. Pushrod?
  53. Got new codes today.
  54. 90 Deville Dies while driving
  55. 84 4.1 Swap To 305/350 ?
  56. new to the forum, need a little help (90 4.5l pfi)
  57. Air Pump Seized (4.1 engine)
  58. OBD I codes for 4.x Engines
  59. junked 4.1 installed chevy 5.0 runs great
  60. I replaced my tps and isc but it stall every now an then
  61. Engine running rough
  62. 85 cadillac seville
  63. '93 4.9L Spark Plugs and Wires
  64. TCC location, please Help!!
  65. White smoke still coming from exhaust?
  66. Starter Disabled "Anti-Theft"
  67. need source for 99 cadillac service manuals
  68. HT4100 coolant issue.
  69. 92 (4.9L) stalling
  70. Cars starting to run a little better!
  71. Oil Overfill Cause Engine Damage?
  72. 4T60E Trans Sport Mode???
  73. can't advance computer beyond PCM?
  74. Turbocharge the 4.9L?
  75. Transmission Wont Shift
  76. discontinued?
  77. Replaced Injectors.. Still no action in Cyls 3 and 4?
  78. Edelbrock engine....
  79. Rough Idle
  80. A/c
  81. Speedometer problems......
  82. 1985 Seville HELP NEEDED
  83. Weird A/C air condition problem
  84. Size of O-rings in fuel line
  85. Fuel Filter Location.
  86. 94 Deville Boils Over after Engine Off
  87. Dexcool in a 4.9L???
  88. 1992 4.9 goes to open loop at HWY speeds.
  89. Bad Engines?
  90. fuel pump location (84 4100)
  91. car wont start (84 4100)
  92. Overhauling and Modifying a 1982 HT4100
  93. 92 deville bad head gasket selling?
  94. 92 deville please help
  95. New 4.9 problem, horrific idle, backfiring
  96. Oil Cooler...
  97. 83 eldorado with new reman engine and tranny timing / ping probs
  98. 4.1 to 4.7
  99. Car giving me fits
  100. 89 Seville idles at 2200
  101. help with codes
  102. 4.5 cranks but no start
  103. 4.9L Stalling out
  104. 'Service Engine Soon' Light on my 4.9 DeVille - Any ideas?
  105. Pistons for a 4.5L and 4.9L the same???
  106. 4.9 distributor help
  107. umm...help please!
  108. 84 coupe deville codes
  109. engine swap
  110. 1990 deville starter replacement
  111. TPS Enhancer
  112. What kind of spark plugs for the HT4100?
  113. Vehicle Data List, Can you spot the problem?
  114. changing belt
  115. 92 Deville - OIL IN COOLANT
  116. 94' sedan deville woes Heeellllllp.
  117. What are the troubleshooting steps for injectors/plugs/wires?
  118. 4.9 Engine Oil Cooler Line replacement
  119. INTERMITTANT "Missing" and rough running/idle
  120. Ppplllleeeeaaassseee Help!!!
  121. ok so maybe its the alternator
  122. engine coolant supplement
  123. Ford SVO Injectors, Can i use them?
  124. '85 Deville Engine Temp Fan Light
  125. If I disconnect the battery.....
  126. 4.9L distributor questions
  127. How to go into different parts of OBD?
  128. gas smell?
  129. 92 Deville Surging during idle!
  130. symptoms of a bad cat?
  131. ebay purchase question?
  132. Flowmaster 80 Series-I LOVE IT!
  133. Over Heating
  134. high throttle on start. Code 26
  135. Fram Air Hog-Test
  136. 4.9L Roller Rockers?
  137. '86 Fleetwood 75 FWD
  138. TPS Adjustment for 85 4.1 (RWD)
  139. where is the thing???!!!!!!????
  140. radiator removal and installation
  141. 92 deville "set timing mode"????
  142. Ahh!!!
  143. What to do to make car stop running rich?
  144. 92 deville clicking after shut off???
  145. Spark Knock, Continued....
  146. Throttle Body and Air CLeaner Housing
  147. Engine Dies...
  148. Quick PCV question
  149. reman Ht 4100 is in looking for reman tranny advice, sources, install, fluid etc.
  150. bogging 4.9 in a Fiero
  151. Hi - 89 Deville 4.5 Liter V8 in 84 Pontiac Fiero
  152. Overheat Problem
  153. '89 DeVille, ISP motor bounces
  154. How to tell if water pump is going out?
  155. Overheating Badly
  156. MAT Sensor location...
  157. Serpentine belt for 4.9 ('91 Deville)?
  158. sputtering
  159. Radiator leak
  160. 15 Amp ERLS blowing
  161. 94 deville fuel delivery prob. HELP!
  162. wtf
  163. loud tapping noise in the left bank sounds like from top end
  164. swap engine
  165. eric
  166. replacing a broke pulley
  167. Jrb
  168. 87 eldorado 4.1L in an 84 fiero - SES light ON
  169. so many codes!
  170. 91 Deville 4.9 with no power- Need Help
  171. 0.07 volts for ground???
  172. 87 Eldorado 4.1L
  173. type of oil
  174. ISC motor idle speed
  175. how do i remove the throttle body?
  176. got my 4.1 reman in but it wont fire up
  177. High RPM on Motor Start - 4.9
  178. 4.5 V8 Water in Oil
  179. 88 4.5 V8 Water In Oil
  180. Aftermarket 4100 Parts?
  181. coolant leak from timing cover?
  182. Hammer -vs- Fussy Starter
  183. bad thermostats, hopefully?
  184. 4.1 TPS sensor
  185. Strange engine/ecu problem
  186. Best motor oil for 4.9?
  187. 4.5 Coolant Problems, Leaking Fluid - but from where?
  188. simple 4.9 questions
  189. 4.9L Firing order + Cylinder location HERE!
  190. 4.1 Rough Idle
  191. Best (Worst) Air Filters to Use
  192. 4.9L performance upgrades?
  193. 4.1 to 4.5 swap
  194. How much for New Head Gaskets?
  195. new mat and coolent sensors
  196. rough idle and sputtering
  197. 4.1 exhaust manifold
  198. 4.9 Head Gasket
  199. problem with "service engine soon"
  200. Advance timing on 4.9
  201. What MPG for 87 Eldorado, 4.1?
  202. E048 EGR fault code how to fix?
  203. 4.9 And The Gas Mileage Sucks!!!
  204. Any way to disable the ses light?
  205. 95 deville tranny question
  206. 92' dies then restarts by its self
  207. ECM pinouts
  208. Dead 89 deville engine
  209. Going to be a long weekend
  210. A few questions for the Caddy Experts 4.9L
  211. old radiator cap problematic?
  212. 4.9 ltr
  213. 4.9 reliability :P
  214. Help With Code
  215. confused
  216. 4.9 Ltr Timing Belt?
  217. Drive ADL switch?
  218. spark plug question
  219. code ro15
  220. 92 Fleetwood 4.9 hesitation/code help
  221. 4.5 no start, no life. sorta familiar
  222. Yea another code ??
  223. 4.1 Operating Temperatures
  224. coolant leak
  225. A few questions regarding the 4.9
  226. code questions please...
  227. Throttle body bolt stripped out of intake manifold
  228. steering wheel will lock up and car cut off
  229. Help with 89 Sedan deVille codes...
  230. how good are the bottom ends on the 4.9?
  231. E98 code - help!!??
  232. 4.9L northstar
  233. Need help ... engine kicks, accelerates/revs itself
  234. '89 DeVille a/c not working
  235. HT4100 Stalling
  236. 4.9 oil consumption
  237. ht 4100 change over to 350 chevy
  238. Will 4.9 heads fit on a 4.1 block?
  239. Thinking about getting a new coil
  240. 87 Cadillac Seville ,4.1 with blown head gasket
  241. Hi. I need lots of help concerning the 4.9L. Thanks.
  242. timing a 4.5
  243. pulley bearing? serpentine belt not moving
  244. Hub on crankshaft
  245. Tackling Motor mount Replacement-92 Seville(4.9)
  246. 1. Diag Codes 2. Engine Stall
  247. squeek squeek .my speedo cable i think
  248. coolant in oil in my new motor
  249. coolant in oil
  250. Reconnecting Spark Plug Wires - 4.9L