: Northstar Engines and System Technical Discussion



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  1. Whirring noise.....you thinks its the alternator?
  2. Wot?
  3. 5W30 vs 10W30, pre 2000 Northstar 84 degree weather
  4. Thermagasket, cylinder head repair goop
  5. Head Gasket Repair - DIY?
  6. 4T80E heartbreak with pictures
  7. N* Replacement
  8. Northstar Motor Mechanic From Dealer
  9. Fuel Pump 95 SLS
  10. Minor value cover (head cover) leaks???Concern???
  11. N* Head Gasket Job, What parts should i BUY
  12. Jasper Engines HEAT TAB
  13. Head Gaskets Again !?!?
  14. 96 deville codes/very sluggish start
  15. n* experts chime in
  16. NorthStar Supercharger!!!
  17. 1997 Deville Coolant Flush
  18. I think i got this Traction Control thing figured out!
  19. Northstar Brainteaser
  20. New Northstar in 2008? Ultra?
  21. Service Engine Light and history codes
  22. Whats code 94?
  23. DIY Replace Coolant for 94 STS
  24. Lower Crankcase Reseal
  25. PC0300 with troubleshoot. Coil Resistance?
  26. '94 Eldorado Coolant change. Help!
  27. Squeaking belt noise - Help!
  28. oil change timing
  29. changed FPR now P0507 code?
  30. need help with water pump.
  31. Fix it or not? Head Gasket.
  32. Future 1996 STS buyer
  33. update on Polyisobutylene
  34. So, I took it to Cottman........
  35. 03 DTS Major Tune Up
  36. Codes, Codes, and more codes....
  37. First WOT on Grandma Owned N*
  38. Tech Manual
  39. What are the performance number of the SLS,DHS
  40. 98 Seville engine mount
  41. N* all OBDII?
  42. EGR Valve Cleaning and Location
  43. How To Replace O2 Sensor Bank 1 Sensor 1
  44. 93 Eldo transaxle
  45. Intake Bolts
  46. Fuel rail/line recall
  47. Saw an interesting Swap today.... (56k take a nap)
  48. Need some help from someone with a 96-99 manual
  49. Not enough WOTs?
  50. another problem solved! N* stutter gone
  51. Coolant Eats Gasket?
  52. Starter Idiocy?
  53. Have you tried Polyisobutylene ??
  54. How to Remove EGR Valve
  55. Granatelli Trans Tuner - Anyone try this?
  56. Granatelli Trans Tuner - Anyone try this?
  57. Performance Survey - New Owner - Seeking Ideas
  58. 94 STS - Throttle Plate Orientation
  59. cruise linkage
  60. 95 STS hi-rpm and auto-acceleration problem
  61. Data on the northstar
  62. Buy a N* with a blown head gasket - Dumb idea?
  63. Weird Idle Issues
  64. 1994 Concourse stuttering
  65. Cooling Fans
  66. Coolant supplement clogged T stat
  67. ghost in the machine
  68. Turbo STS Dyno results
  69. PCM Source
  70. 99 Deville misfire and fuel sensor
  71. Learning about Torque Convertor and solenoid
  72. Casper Electronics TPS Enhancer
  73. What year Nstars fit '99 Deville?
  74. Help:Crankshaft Sensor Replacement
  75. Torque convertor can damage the solenoids?
  76. What will it take to get you to buy a 80mm throttle body?
  77. Is this a "freeze plug"?
  78. Is this a 95 intake?
  79. Weird Hydraulic whine, maybe tranny????
  80. # 8 misfire
  81. where are the plugs on my 03 dhs northstar engine?
  82. Water Leak
  83. 4T80E vs Dexron VI, GM new standard
  84. 200,000 mile mark reality? 1996 STS NStar
  85. It wasnt a hole in the block!!!!!
  86. Just Bought a Granma owned NS w/81K-WOT?
  87. please help!?!?!?!?!
  88. High volt MAP
  89. Rough Idle and Stuttering Acceleration
  90. 94 seville sls oil pan gasket replacement...
  91. 97 headgaskets what else should be done?
  92. Differences in the Northstar engines
  93. PCM info for NorthStar
  94. accessing rear spark plugs
  95. 99 STS Turbo charged video
  96. 1994 Eldorado P083 Code?
  97. Looking for help with Codes
  98. What's this noise....
  99. How do you I.D. an engine?
  100. Expansion tank leaking...
  101. Engine ID
  102. 1994 eldorado fuel pump
  103. unchanged SP wires longevity?
  104. Launch Control for N* ignition
  105. coolant loss
  106. Can I fix my 01 Northstar myself?
  107. Turbo WOT 7psi to REDLINE
  108. 0101 MAF-continues
  109. Turbo Update
  110. changing out o2 sensor on 97 deville
  111. P0404 - Exhaust Gas Recirculation (EGR) Open Position Performance?
  112. deciphering DTC messages into plain English
  113. Cylinder Head Info!
  114. Northstar noise
  115. Best Code Reader/Scanner?
  116. EGR change w/ SS fuel rail- trick maybe
  117. Where is the INPUT SPEED SENSOR?
  118. 97 deville fuel problem
  119. GM coolant additive???
  120. Car wont start
  121. Serpentine belt
  122. no overdrive in my 98 eldo
  123. Really Head Gasket?
  124. New plugs and wires, now misfire
  125. STS Tranny trouble
  126. Improper Sparg plug gap, what happens?
  127. 94 STS hesitates or stumbles
  128. Need a Timesert kit
  129. its been a little while but i am back for good!!
  130. Stalls after fill-up
  131. High Oil Consumption *INFO*
  132. I got porked...Blown N*.
  133. Glowing red exhaust manifolds
  134. Pop Off / Backfire Valve Replacement
  135. fuel filter location?
  136. Pictures of Turbo Project
  137. Head gasket compressed thickness
  138. Emission Codes
  139. Extremely Rough Idle... Cracked Intake Manifold?
  140. Spark Plug Gap
  141. Biggest Problems with the N*'s?
  142. 1999 STS - Timesert question
  143. Gurgling Sound/ Trapped Air in Coolant System
  144. Injector
  145. 95 Deville howl's near the belt
  146. 97 deville N* head gasket costs?????
  147. No overdive
  148. Emmissions Codes
  149. One gear, LIMP MODE? NO CODES
  150. 2000 Deville TCC PWM replacement
  151. p056
  152. 98 Northstar Fuel Rail Recall
  153. Removing bad FPR
  154. '95 Eldorado start-up getting more "difficult"
  155. 93 Northstar Headgasket - Can I do it myself?
  156. Reliability and longevity of a 97 N* motor?
  157. Gas-saving gadgets article
  158. Crank Position Sensor
  159. 1993 1994 Northstar Intake Manifold
  160. How do I spot a head gasket starting to go?
  161. 97 deville radiator drain
  162. N* with code p041
  163. Intake mod
  164. Cold Start Backfire from 97 N*?
  165. OBD2 computer interface
  166. Jasper Verses OEM
  167. 1996 Eldorado Codes
  168. Piston Slap ?
  169. P0420 Code
  170. Northstar oil pump
  171. N*4.6 vibration problem
  172. Cooling system question
  173. Need an engine teardown pic...
  174. Cam Cover Gasket / o-ring replacement
  175. changing altn
  176. Reflash PCM on 96
  177. Link From Consumer Affairs to Dexcool Lawsuit Atty.
  178. Timesert Kit Needed Asap!!!
  179. Failed Emissions Test- But No Codes
  180. fpr fpr
  181. 1999 Northstar with blown head gasket
  182. Water pump??
  183. plugs and wires
  184. Changed TPS on 95 STS d/t P020, now MIL & P080
  185. throttle body cleaning was the answer
  186. Now having trouble in a different way
  187. 200 Deville occasionally won't Idle when starting warm
  188. P1406 Code? EGR?
  189. idle relearn and isc adjust
  190. 1993 Fuel Psi regulator
  191. Cracked Engine Block in 2001 DeVille
  192. 93 -99 N* vs 2000 - 2004, which is better
  193. motor mount...and more
  194. 97 deville leakin trans fluid
  195. MAF replacement
  196. too hot and too cold
  197. Does anybody here have full access to TSB info at alldata?
  198. Overheat SOLVED ! Thank You Ranger & Others
  199. '95 Northstar 4.6 oil leak
  200. Northstar Blower Motor For Sale
  201. 96 Deville running hot
  202. 97 deville stalling, no codes
  203. Changing Spark Plugs- '99 STS
  204. 94 sls overheating,maybe...
  205. I see a lot of posts on supercharging a Northstar
  206. How to get more torque, 03-DTS
  207. Replace or fix
  208. Typical NOOB questions...
  209. Northstar intake manifold
  210. Northstar intake manifold
  211. hey zonie or ranger,
  212. Losing Coolant & Radiator Leakage
  213. ac delco plugs..<-1999 and 2000-> years, whats the difference?
  214. Delco VS Bosch Plug Wires
  215. Oil "Blow By"
  216. Coming 6 speed automatic
  217. WOT - is this the ONLY way to remove carbon buildup?
  218. New source for 80mm throttle bodies!
  219. Is It A Head Gasket???
  220. Jasper Engines
  221. Confused about spark plug type
  222. Surge Tank Design
  223. Stranded out of town!!!
  224. Speed limiter
  225. cams in a northstar
  226. acceleration troubles...
  227. Coolant crossover photos
  228. P0300 Vote!
  229. the best oil for the northstar engine
  230. No Start Please I Need Help!!
  231. 3 questions regarding the timesert job
  232. fuel air mixture
  233. Replacing O2s
  234. P056
  235. Northstar V. 4.9
  236. 97 northstar engine miss
  237. Engine oil leak
  238. IN Trouble Now losing coolant
  239. ice possible message...?
  240. 96 deville oil leak
  241. Replacing a Northstar with a LS1
  242. i cant stand this stalling, why does this happen?
  243. 94STS Blown Gasket Pics
  244. 96 deville
  245. all my problems help!!!!
  246. adding a fuel treatment
  247. Is it normal for...
  248. Surging at low revs and hard shift into 2nd
  249. couple of problems, only one code- AMP B1024
  250. You want DYNO graphs?