: HT4100 4.1, 4.5, 4.9



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  1. 5W-30 Vs 10W30 for the cold winter?
  2. trans delays shift
  3. Rebuilt motor for an 85
  4. 87 Eldo w 35,000 mi, Change tran fluid?
  5. Fuel Injector Impedance - High/Low
  6. How to make a wooden Engine Support Fixture J-28467
  7. 4.1 Coolant Leak from block-PLEASE HELP!
  8. 84 coupe deville fan shroud
  9. Mileage and Power loss, again.
  10. 4.9 valve cover gasket
  11. C-v joint
  12. 82' couple 4100 - accelerating by itslef - HELP
  13. Do I have to change coolant?
  14. 1990 4.5L Eldroado Engine running rough
  15. 4.9 speed limiter...
  16. Is this the right stuff, going to attempt this weekend
  17. TPS setting
  18. Tune up on a 89 Deville w/ 4.5
  19. Quick Question
  20. 92 eldorado E0085 dtc help pls
  21. Engine Rattle
  22. 4.1 chrome?!
  23. WHat Buttons Do I hit to CHeck the Error COdes On My 93 4.9?
  24. 4.9 off idle stumble
  25. HELP! Would a bad EGR valve cause my car to run rough on the highway?
  26. White Smoke
  27. Radiator Leak
  28. 4.5 Vs 4.9... Compairable?
  29. ROUGH idle , strange code .
  30. 85 Fleetwood FWD Engine Trouble
  31. WTB: ASAP 4.9L Front Exhaust Manifold
  32. 91 Deville 4.9 rough idle
  33. My 86 SedanDeville is running rough above 55mph
  34. Has anyone converted to the electrocruise?
  35. '86 DeVille HT4100 knock - please help :-(
  36. Engine noise while in park?
  37. 4.9 with poor gas mileage. just changed o2
  38. Low Oil Pressure
  39. Changing oil pan gasket
  40. Looking for a couple of VSS wires - '91 Deville
  41. the return of E48/E49
  42. 84' seville is a mess!
  43. EGR Vavle
  44. engine swap
  45. 92deville, idle(rough) Injector service??
  46. CAM sensor
  47. supercharging the 4.9
  48. Please help me with my 4.1..or give me a mechanic who can
  49. How to remove/replace rattling CAT
  50. pellets and 4.5 engine
  51. ohm reading for injectors on 4.5
  52. ? acceptable ohm resistance for injectors
  53. Intermittent Stalling
  54. 4.5 EGR vs. 4.9 EGR
  55. 4.5 engine
  56. Pushrod?
  57. Got new codes today.
  58. 90 Deville Dies while driving
  59. 84 4.1 Swap To 305/350 ?
  60. new to the forum, need a little help (90 4.5l pfi)
  61. Air Pump Seized (4.1 engine)
  62. OBD I codes for 4.x Engines
  63. junked 4.1 installed chevy 5.0 runs great
  64. I replaced my tps and isc but it stall every now an then
  65. Engine running rough
  66. 85 cadillac seville
  67. '93 4.9L Spark Plugs and Wires
  68. TCC location, please Help!!
  69. White smoke still coming from exhaust?
  70. Starter Disabled "Anti-Theft"
  71. need source for 99 cadillac service manuals
  72. HT4100 coolant issue.
  73. 92 (4.9L) stalling
  74. Cars starting to run a little better!
  75. Oil Overfill Cause Engine Damage?
  76. 4T60E Trans Sport Mode???
  77. can't advance computer beyond PCM?
  78. Turbocharge the 4.9L?
  79. Transmission Wont Shift
  80. discontinued?
  81. Replaced Injectors.. Still no action in Cyls 3 and 4?
  82. Edelbrock engine....
  83. Rough Idle
  84. A/c
  85. Speedometer problems......
  86. 1985 Seville HELP NEEDED
  87. Weird A/C air condition problem
  88. Size of O-rings in fuel line
  89. Fuel Filter Location.
  90. 94 Deville Boils Over after Engine Off
  91. Dexcool in a 4.9L???
  92. 1992 4.9 goes to open loop at HWY speeds.
  93. Bad Engines?
  94. fuel pump location (84 4100)
  95. car wont start (84 4100)
  96. Overhauling and Modifying a 1982 HT4100
  97. 92 deville bad head gasket selling?
  98. 92 deville please help
  99. New 4.9 problem, horrific idle, backfiring
  100. Oil Cooler...
  101. 83 eldorado with new reman engine and tranny timing / ping probs
  102. 4.1 to 4.7
  103. Car giving me fits
  104. 89 Seville idles at 2200
  105. help with codes
  106. 4.5 cranks but no start
  107. 4.9L Stalling out
  108. 'Service Engine Soon' Light on my 4.9 DeVille - Any ideas?
  109. Pistons for a 4.5L and 4.9L the same???
  110. 4.9 distributor help
  111. umm...help please!
  112. 84 coupe deville codes
  113. engine swap
  114. 1990 deville starter replacement
  115. TPS Enhancer
  116. What kind of spark plugs for the HT4100?
  117. Vehicle Data List, Can you spot the problem?
  118. changing belt
  119. 92 Deville - OIL IN COOLANT
  120. 94' sedan deville woes Heeellllllp.
  121. What are the troubleshooting steps for injectors/plugs/wires?
  122. 4.9 Engine Oil Cooler Line replacement
  123. INTERMITTANT "Missing" and rough running/idle
  124. Ppplllleeeeaaassseee Help!!!
  125. ok so maybe its the alternator
  126. engine coolant supplement
  127. Ford SVO Injectors, Can i use them?
  128. '85 Deville Engine Temp Fan Light
  129. If I disconnect the battery.....
  130. 4.9L distributor questions
  131. How to go into different parts of OBD?
  132. gas smell?
  133. 92 Deville Surging during idle!
  134. symptoms of a bad cat?
  135. ebay purchase question?
  136. Flowmaster 80 Series-I LOVE IT!
  137. Over Heating
  138. high throttle on start. Code 26
  139. Fram Air Hog-Test
  140. 4.9L Roller Rockers?
  141. '86 Fleetwood 75 FWD
  142. TPS Adjustment for 85 4.1 (RWD)
  143. where is the thing???!!!!!!????
  144. radiator removal and installation
  145. 92 deville "set timing mode"????
  146. Ahh!!!
  147. What to do to make car stop running rich?
  148. 92 deville clicking after shut off???
  149. Spark Knock, Continued....
  150. Throttle Body and Air CLeaner Housing
  151. Engine Dies...
  152. Quick PCV question
  153. reman Ht 4100 is in looking for reman tranny advice, sources, install, fluid etc.
  154. bogging 4.9 in a Fiero
  155. Hi - 89 Deville 4.5 Liter V8 in 84 Pontiac Fiero
  156. Overheat Problem
  157. '89 DeVille, ISP motor bounces
  158. How to tell if water pump is going out?
  159. Overheating Badly
  160. MAT Sensor location...
  161. Serpentine belt for 4.9 ('91 Deville)?
  162. sputtering
  163. Radiator leak
  164. 15 Amp ERLS blowing
  165. 94 deville fuel delivery prob. HELP!
  166. wtf
  167. loud tapping noise in the left bank sounds like from top end
  168. swap engine
  169. eric
  170. replacing a broke pulley
  171. Jrb
  172. 87 eldorado 4.1L in an 84 fiero - SES light ON
  173. so many codes!
  174. 91 Deville 4.9 with no power- Need Help
  175. 0.07 volts for ground???
  176. 87 Eldorado 4.1L
  177. type of oil
  178. ISC motor idle speed
  179. how do i remove the throttle body?
  180. got my 4.1 reman in but it wont fire up
  181. High RPM on Motor Start - 4.9
  182. 4.5 V8 Water in Oil
  183. 88 4.5 V8 Water In Oil
  184. Aftermarket 4100 Parts?
  185. coolant leak from timing cover?
  186. Hammer -vs- Fussy Starter
  187. bad thermostats, hopefully?
  188. 4.1 TPS sensor
  189. Strange engine/ecu problem
  190. Best motor oil for 4.9?
  191. 4.5 Coolant Problems, Leaking Fluid - but from where?
  192. simple 4.9 questions
  193. 4.9L Firing order + Cylinder location HERE!
  194. 4.1 Rough Idle
  195. Best (Worst) Air Filters to Use
  196. 4.9L performance upgrades?
  197. 4.1 to 4.5 swap
  198. How much for New Head Gaskets?
  199. new mat and coolent sensors
  200. rough idle and sputtering
  201. 4.1 exhaust manifold
  202. 4.9 Head Gasket
  203. problem with "service engine soon"
  204. Advance timing on 4.9
  205. What MPG for 87 Eldorado, 4.1?
  206. E048 EGR fault code how to fix?
  207. 4.9 And The Gas Mileage Sucks!!!
  208. Any way to disable the ses light?
  209. 95 deville tranny question
  210. 92' dies then restarts by its self
  211. ECM pinouts
  212. Dead 89 deville engine
  213. Going to be a long weekend
  214. A few questions for the Caddy Experts 4.9L
  215. old radiator cap problematic?
  216. 4.9 ltr
  217. 4.9 reliability :P
  218. Help With Code
  219. confused
  220. 4.9 Ltr Timing Belt?
  221. Drive ADL switch?
  222. spark plug question
  223. code ro15
  224. 92 Fleetwood 4.9 hesitation/code help
  225. 4.5 no start, no life. sorta familiar
  226. Yea another code ??
  227. 4.1 Operating Temperatures
  228. coolant leak
  229. A few questions regarding the 4.9
  230. code questions please...
  231. Throttle body bolt stripped out of intake manifold
  232. steering wheel will lock up and car cut off
  233. Help with 89 Sedan deVille codes...
  234. how good are the bottom ends on the 4.9?
  235. E98 code - help!!??
  236. 4.9L northstar
  237. Need help ... engine kicks, accelerates/revs itself
  238. '89 DeVille a/c not working
  239. HT4100 Stalling
  240. 4.9 oil consumption
  241. ht 4100 change over to 350 chevy
  242. Will 4.9 heads fit on a 4.1 block?
  243. Thinking about getting a new coil
  244. 87 Cadillac Seville ,4.1 with blown head gasket
  245. Hi. I need lots of help concerning the 4.9L. Thanks.
  246. timing a 4.5
  247. pulley bearing? serpentine belt not moving
  248. Hub on crankshaft
  249. Tackling Motor mount Replacement-92 Seville(4.9)
  250. 1. Diag Codes 2. Engine Stall