: HT4100 4.1, 4.5, 4.9



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