: Northstar Engines and System Technical Discussion



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  1. '98 STS - "Service engine soon" light was on for two days...now off...car runs great
  2. Coolant Flush?
  3. Random Multiple Cylinder Misfire
  4. Idle seems rough.
  5. how to avoid cracked heads?
  6. Can you put in too much coolant?
  7. Dex-Cool
  8. Engine Coolant
  9. Weird?
  10. oil pressure loss "STOP ENGINE" warning FIX
  11. Impossible To Fix Overheating Problem
  12. Leaking coolant? Head gasket???
  13. 4t80-e transmission leakage
  14. Resonator Question..
  15. 96 Eldo Warm Eng. Miss. Acceleration Miss.
  16. How do I retrive codes
  17. Help! Service Emissions Soon and Check Engine
  18. Can you repair the fuel rail
  19. Where to get Northstar computer and harness??
  20. A Little Head
  21. 97 Eldo running weak!
  22. Ok, I've pulled the codes and decoded them...
  23. How do I pull codes off my 97 SLS?
  24. help!!...no start and no power at purple wire
  25. slow return to idle (95 sts)
  26. surging under WOT
  27. where do i get performance chips
  28. EMERGENCY----c1232 and c1255
  29. SUPERCHARGER soon
  30. Fuel Problem. TPS or a cleaning?
  31. Northstar needs engine protectors ?
  32. Spark Plug and Wire Change Summary
  33. Help! 96 STS Stalling and Barely Drives
  34. Bad oil Leak
  35. Is it possible to go from 4.1 to Northstar?
  36. need help on replacing the idle speed control motor
  37. Fuel Rail Replacement 96 sts
  38. ISO mechanic for 95 Seville in NE Illinois/SE Wisconsin
  39. N.Star Deville afermarket Tachometer ?
  40. Northstar Electromotive TEC3 .bin file needed
  41. Blown Head Gasket...Help!!
  42. STS Computer Into Deville?
  43. Frozen Spark Plugs
  44. thanks elwesso,lido
  45. Eldorado Exhaust??
  46. Frenchcad Is Asking For Help To Burn Speed Limit...
  47. car won't start!
  48. 95 STS corrosion
  49. One Dead Deville 1999
  50. 94' SLS t073 erratic idle & stalling
  51. 2000sts trouble codes
  52. check engine soon????????
  53. 99 STS Gas pedal sticking
  54. 94 Northstar question
  55. BG44k
  56. (Pressing gas) CLUNK.. What the heck?
  57. Fuel Additives
  58. Loud Pop
  59. help with some error codes 96 etc.
  60. Increasing Displacement
  61. 4T80E gearing
  62. Holy hell, i tried that Lucus oil additive....
  63. "Stop Engine Low Oil Pressure"
  64. Gas MPG low? and electrical question
  65. need help again, new code
  66. Failed Emission - high HC
  67. Stalling/Starting Problem
  68. 91 vw golf with northstar!!must see
  69. Looking for a source of Northstar Engines
  70. egr
  71. Starter Enable Relay!! Found it, Cleaned it, Fixed it.!!!
  72. Northstar head compatibility
  73. 96 Oil Leak
  74. Parts swapping
  75. Is there a GM TSB for the use of Time-Serts?
  76. 2000 Sts Exhaust
  77. 97 STS eliminate the converter?
  78. Exhaust question
  79. Limp yo-self home, N*!
  80. Trans. Problem?
  81. where is the starter relay, 1993 sts northstar
  82. Transmission flush?
  83. Forum Opinion on 2000 STS
  84. PLEASE!!! -4 and under, lights on,no power to starter!!
  85. dtc pcm 0139 now what?
  86. 1995 sts,manifold cover
  87. Check Coolant Level Message & temp. question
  88. overdrive or drive
  89. Code in history ? P039
  90. Dtc P0101
  91. How to pull engine codes and where to find?
  92. Performance mods!
  93. Diry relief valve causing loss of oil pressure?
  94. 95 STS Water Pump Question.
  95. NOLOGY wires for northstar motors
  96. northstar question
  97. Code SO61? PO83?
  98. Clicking noise
  99. Huge muffler comparison
  100. Fixed the egr valve myself
  101. Does Northstar turn off cylinders like 4-6-8?
  102. Fuel Additives
  103. Problems with N* arise
  104. Diagnostic Code?
  105. Went to a mechanic today on EGR
  106. Thoughts, opinions, and suggestions on carbon deposits.
  107. Year 2000 Northstar 32V engine oil consumption problem?
  108. Spark Plugs
  109. EGR Valve , need help locating it
  110. filling coolant system after flush
  111. Tornado Fuel Saver
  112. EGR valve install question
  113. Where are my O2 Sensors?
  114. PCM? What now
  115. My timesert kit on ebay, reserve at $160!
  116. No speedo!!!
  117. Carbon buildup/ fuel additives/ opinions???
  118. 95 sts starting problems
  119. Should I fix or sell?
  120. could be 1 or 2 things idler pulley or water pump plz help
  121. Northstar driven 94 Pontiac Grand Prix GTP RWD
  122. Leaking Water Pump 1998 Deville
  123. Smoking Northstar!
  124. Engine rebuilt?
  125. Northstar Squealing noise
  126. Oil change
  127. performance exhaust
  128. '94 Concours Hard To Start
  129. P0113/P1111 - then what ?
  130. whast should a 94 north start run temp wise
  131. Changing Serpentine Belt
  132. Custom Intake
  133. Maintaining Northstar Engines *A must Read*
  134. Headgasket replacement finished
  135. N* engine mount bushings...what happens if...
  136. How to remove the belt tensioner?
  137. New Cadillac owner
  138. TO 73 code??????
  139. What are my options?
  140. 2000 DeVille - Stalling
  141. Temp Sensor
  142. Misfirin' 98 DeVille. How much $ is DTC p0300,603,1381 cost?
  143. Temperature sensor - another problem...
  144. 4 Questions / 93 STS w/ 4.6
  145. Lights flicker?
  146. lights that dim when...
  147. Glitch In 97 Concours
  148. alternator replacement part deux
  149. P086 code on 94 STS keep sme from getting it smogged
  150. Calling out 156mph
  151. Cadillac dealer...
  152. ShadowLvr400......
  153. 4.6 northstar / engine, Trans swap ?
  154. TRANSMISSION/Torque convertor problems??? HELP!!!
  155. Nitrous
  156. More on coolant issues....Long post alert!
  157. '95 STS Clearing on-board diagnostic codes
  158. Quick and Simple Question
  159. 2000 STS Oil Life
  160. Calling all North* Specialist....Changing out the Alternator
  161. Service Engine Soon? What's that Noise?
  162. Dashboard mayhem
  163. weird?
  164. Need Technical Help for Engine swaping...
  165. Anyone have an opinion on electric superchargers?
  166. Will '95 coil pack, intake or exhaust fit my '93 N*?
  167. northstar performance upgrades
  168. Exhaust manifold ?
  169. Please help! Considering a '94 Deville Concours N'star
  170. New member, trying to find out if oil burning is ok!
  171. Repair Advice Needed in Orange County, CA
  172. P030 Code on '93 STS
  173. "no battery charge"
  174. "check oil level"
  175. '95 STS showing SES code: P085
  176. Which o2 sensor??
  177. Code PO24-VSS Signal To TCC-Where is It Located At?
  178. TPS - Problems
  179. thermal meltdown of n* engine ?
  180. Are Gremlins pinching my fuel line? ARGHHH!!
  181. 2002 engine into 97 Deville?
  182. Tune up?
  183. Freeze plugs ( So called )
  184. 94 Concourse Shifting Problem
  185. I smell gas in my 95 concours
  186. message
  187. update on my 97 concours
  188. NA power out of a North*?
  189. 2002 what does loss of dim communication?
  190. Turbos put back?
  191. Leaking Heater Core in 1999 DeVelle
  192. Overheating: Am I screwed?
  193. Bolting filter right on the motor
  194. 94 Eldorado Oil level sensor problem
  195. o2 sensors!!!!!! argggggggg
  196. Help Codes Driving Me Insane
  197. Funny Smell
  198. 94 Seville STS History Codes???
  199. Emissions Code on 1996 STS
  200. Real unhappy with (my new) used caddy - Can't ID the DTC's
  201. Opinions on possible purchase 91 Deville
  202. Signs you need a tuneup?
  203. R/r water pump
  204. Help Me!
  205. Hard Starting STS
  206. OBD2 Reprogramming
  207. Chip or no chip?
  208. Northstar R&R Book Times
  209. Northstars & oil consumption...are there "good" & "bad" motors?
  210. 275hp to 300hp head swap question
  211. Northstar Aftermarket Support
  212. Do Northstars burn oil fast???
  213. Help!!
  214. Northstar overheating
  215. Most common problems with NS motor
  216. Engine size ?????
  217. What is the deal with the Crank Position Sensor and...
  218. sneaky coolant leak, Northstar
  219. Bad plug wires get you crazy codes
  220. stupid dipstick
  221. N* Head Gasket repair part I/ Remove engine
  222. idle speed adjust?
  223. Belt Question
  224. Emissions System
  225. 99 SLS probelms
  226. help with codes?
  227. Head Work
  228. New person here - piston replacement question
  229. How to get to plugs on 00 STS?
  230. 1995 SLS Engine and Trans
  231. tps 1995 sts adjusted
  232. are the '93 and '95 northstar computers the same?
  233. Cracked Water Pump Housing Northstar
  234. Erratic fuel level gauge & a few other ???
  235. Time serts head gaskets and cadillac refunds
  236. 1990 Sedan Deville Valve Job
  237. Limited slip...sort of
  238. Octane reading
  239. Check Oilk Level wont stop
  240. Please help..engine coolant ?....
  241. Traction Control on STS ???
  242. 96 Seville, Check Engine Light, New owner?
  243. Help with cooling system
  244. ? on seville northstar motor?
  245. Help! I have a 1997 Concours(traction c) I would love to know where this wire goes??
  246. maintenence records?
  247. rear windows fog up
  248. Northstar - Golf swap
  249. PCM codes
  250. 1997 Deville problems