: Northstar Engines and System Technical Discussion



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  1. 94 to 97 Northstar interchange question
  2. Bad batch of DELCO PLATINUM 41-950 SPARK PLUGS
  3. How long should plugs/wires last?
  4. Easy question - which is right and which is left?
  5. Tell me how to do a WOT.
  6. How did this guy do burnouts?
  7. 95 Eldorado occasional starting problem.
  8. Coolant change Air purging?
  9. two torque sequences?
  10. mystery oil leak
  11. Still Can't Get The Front Valve Cover Off!!!
  12. Ignition System Problems
  13. This sounds dumb but I'm gonna ask anyway - air intake question
  14. A/C recharge
  15. API grades
  16. Engine Difference between 97' & 99' STS?
  17. part# for speedy sleeve
  18. Post Head gasket job (need Veteran rebuilders advise)
  19. 94 concours acting up..
  20. Trans Question 01 DTS
  21. Engine Error Codes...Please Help
  22. 4.6 L NorthStar Engine Design Questions
  23. multi miss fire multi codes 1996 dev
  24. Have a big ?
  25. What does it all mean?
  26. Metal flakes in engine oil
  27. latest lower end seal job procedure
  28. OBDII Tuner software for Northstar.
  29. Poor gas mileage in aurora 4.0
  30. Northstar Head Gasket, which side, which jug is more common
  31. Code P1415 help?
  32. need new O2s
  33. 2002 Deville transmission
  34. Wanted:1999 4.6 NorthStar leak-down values
  35. MAP Sensor relocation
  36. Can someone explain HOW my injectors went bad?
  37. Bad Mileage Not Fpr
  38. 1999 Cadillac STS Exhaust Mufflers
  39. 4t80e production changes 95-9
  40. Manifolds are melting my car
  41. Check Atf
  42. Putting Northstar on an Engine Stand
  43. Headgasket job +++?
  44. northstar swap into another car, a few questions
  45. 2002 Seville STS Cataylst Issues
  46. Engine Temperatures
  47. Can a 1999 4.6L Northstar "Y" be replaced/exchanged with a "9" of the same year
  48. Amsoil nano-filters (air & oil)
  49. DELCO PLATINUM #41-950 SPARK PLUGS from eBay
  50. 93 Water Pump Confusion
  51. How to check for bad ignition coil?
  52. 94 Eldorado surge in engine and 4 codes
  53. Questions On Crank Shafts
  54. weird start problem that occured
  55. northstar head switching
  56. Northstar 4.6 Interchange and Swapping
  57. Car Farts After WOT
  58. 1999 Northstar engine 85K Miles, How can one tell if is good
  59. 03 Seville Steering Adjustments? ? ?
  60. On My 3 Rear Main Seal
  61. 96 sts crankshaft position sensors
  62. any tranny experts out there?
  63. Fpr For $141.08
  64. Water pump
  65. Rwd N*
  66. Coolant Drain
  67. Coolant Leak 98 Deville
  68. so any chance of an AFC
  69. AC Compressor bypass
  70. 3.5L Shortstar Ignition
  71. Sound
  72. Northstar reliability...
  73. Name That Part
  74. Post headgasket job, one loose end left.
  75. Need re-assembly advise!
  76. Minor starting problem
  77. does it work? (hyper lube)
  78. 96 cadillac deville code after code?!?
  79. Transmission Durability?
  80. Shaky Tachometer at High RPM
  81. 1996 Seville STS Crank Sensors
  82. What other cars use the same style injectors?
  83. Adding Freon
  84. Lost power steering fluid rapidly. Is there a hose?
  85. Northstar engine rebuilders or performance builders in SoCal?
  86. 95 Northstar Coolant leak
  87. EXP ID Codes
  88. Looking for N*mech in northern RI
  89. 93 Eldorado T.C ignition issues
  90. voltage drops when car in drive
  91. after a&b solenoid
  92. Experts please help
  93. 1994 Cadillac Sevile STS thumping into fourth/overdrive
  94. know it all mechanic
  95. Well fellas, I think its really time....
  96. Northstar Head Gasket Issue
  97. timesert kit - for sale on ebay
  98. Strange rattling
  99. Northstar performance parts
  100. Procedure for Coolant flush
  101. Dynomax - Long life?
  102. Running Functional Test on my 94 Deville Concours.
  103. 94 northstar swap
  104. Airbox Computer?
  105. ICM Replacement
  106. Cranks, but won't start
  107. 96 deville antifreeze coming out exhaust
  108. Its Getting Hot Inside
  109. STS fuel Injection problem NEED HELP
  110. I think I'm missing a few ponies!
  111. 99 Deville Hesitating???
  112. Eliminating the exhaust crossover??
  113. Po138???
  114. Front Valve Cover Removal
  115. You guys read this stuff????
  116. camshaft swap "9" motor to "Y" motor
  117. What is TSB 99-06-04-053?
  118. 94 cadillac concours
  119. Can anyone tell me what these compression numbers mean?
  120. H Gasket Job Ballpark Price Needed for Parts
  121. Heater core replacement, help!
  122. Ah, darn... My 94 Eldorado Is having problems.
  123. Anyone know a reputable transmission shop in Orlando?
  124. Lifter?valve noise
  125. 93 Northstar dies out at idle
  126. Time Sert Kit Needed
  127. Engine Replacement
  128. Broken Head Bolt (small type)
  129. P0741 - TCC System Stuck Off...Now What??
  130. homemade locating dowels - a possibility?
  131. Rear Valve Cover Leak!!
  132. Going from a 4.0 to a 4.6
  133. how many miles on your N*?
  134. Crank Position Sensor Replace Quick Question...
  135. 98 STS code P0404 (and P0300)
  136. Not Nearly As Hard As I Thought
  137. what to do about SO codes...
  138. overfilled tranny....
  139. OBD1 chip reprogramming?
  140. Hey Check Out What Im Doing....
  141. 95-6 transmission harness
  142. new headbolts
  143. Torque Converter Clutch Stuck...How to Fix??
  144. BS? "aftermarket Mass Air Sensor = improved hp, torque and mileage from your car"
  145. pulling engine, top or bottom???
  146. RANGER: Can't Identify Codes...
  147. 1996 1/8th mile times!
  148. '96 SDV Update...2 Codes...Help??
  149. Need a new alternator......
  150. Cranking but not starting.. fuel pump relay?
  151. EXP ID 83, 84, 140, 25 ??? Any Help?
  152. timesert kit for sale
  153. Factory Specs for Compression??
  154. torque wrench advice
  155. Stripped Oil Pan Bolt Hole
  156. Would you like some cheese and crackers with that Whine?
  157. Ready to rebuild-best source for tserts and bearings
  158. Stability Reduced? wut?
  159. Compression numbers for the North*
  160. Options to repair ONE engine block thread
  161. What ever happened to the supercarger for N*?
  162. Torquing of Rocker????
  163. Minor Problem with my 94 SLS
  164. Chip & Bored T/B ???
  165. Why with the Northstar 4.6?
  166. PCM reflash for 95
  167. Sooooo....
  168. cam torque
  169. Blwoin a little smoke..
  170. casting number ID
  171. DANG - Trouble Codes Question
  172. Need some help..abs troubles?
  173. I saw a smoking Deville
  174. PCM Question II
  175. Air intake and airflow
  176. Trans making noise in park and neutral
  177. water pump replacement
  178. Pcm?
  179. STS Engine Cut-Out
  180. 94 SLS 4.6 showing oil pressure
  181. Performance transmission
  182. Aftermarket air intake...
  183. TCS C1287/C1286 help please
  184. Pics..pics...pics.....pics........
  185. Computer Swap Ok?
  186. MIL's - Anyone tried them yet?
  187. Anyone ever done or heard about doing this?
  188. Stumped (P0307)
  189. pressure control circuit code 076
  190. 94 Eldorado 4.6 starting problem
  191. Anyone have sound clips of their exhaust?
  192. 98deville whole computer lit up
  193. TPS autolearn for 1995
  194. '96 DeVille...New Owner...Am I NUTS??
  195. Turbo Track Times
  196. Anyone with rough starts, loss of power..read this.
  197. G-tech pro times.
  198. That's what I call stopping a leak!
  199. Need Valve Body Torque Secs ASAP Please
  200. 98 deville x grandpa mobile
  201. Northstar Experts Please Stand Up.....
  202. Robert Benham
  203. Bleeding air out of cooling system
  204. I think I blew it up
  205. northstar rough accleration/idle
  206. ALBUNDY - can't PM you
  207. Gm top engine cleaner
  208. transmission interchange
  209. 96 deville N* cats question
  210. 94 SLS I seem to be on a losing streak!
  211. Premium vs. Regular
  212. coolant fans
  213. Overheat Part 3
  214. coolant loss
  215. 94 Eldorado Power Steering Fluid?
  216. Big Serts installation
  217. lifter noise?
  218. Some advice
  219. Overheat, Part 2
  220. 2000 STS MAP sensor voltage high?
  221. FRP Help!! ASAP!!
  222. Overheat!
  223. 1999 Eldorado won't start and left me stranded
  224. Anyone use "regular" plug wires in N*?
  225. Higher Stall Converter...
  226. i think i found a fuel control system.
  227. 94 SLS radiator hydraulic line
  228. K&N Intake...I want one!
  229. ABS wiring diagram
  230. What are the available Northstar aftermarket performance parts?
  231. Northstar Oil Leak
  232. Northstar in the 1997-1999 Deville.. questions.
  233. N* with nitrous.
  234. 5000 mile or wait for oil life trigger?
  235. Hi Flow Cat converter to go with Corsa Exhaust, which one?
  236. MSD coils? I hit 104
  237. eldorado1- throttle body for 94 eldo available?
  238. need IAC, TPS, MAP sensors?
  239. 4.6 caddy vs. olds 4.0
  240. Has anyone here added performance parts to a 94 eldorado
  241. Bad coil packs or what?
  242. northstar battery
  243. 94 eldorado bad starter possibly?
  244. Starter change 94 SLS
  245. What's happening to the messages display?
  246. Day after alternator replace, now I need a new belt...coincidence?
  247. block off EGR
  248. Transmisson monitor??
  249. Water pump leak??
  250. Will machined heads mess up the ECU due to increased compression ?