: Northstar Engines and System Technical Discussion



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  1. dtc pcm 0139 now what?
  2. 1995 sts,manifold cover
  3. Check Coolant Level Message & temp. question
  4. overdrive or drive
  5. Code in history ? P039
  6. Dtc P0101
  7. How to pull engine codes and where to find?
  8. Performance mods!
  9. Diry relief valve causing loss of oil pressure?
  10. 95 STS Water Pump Question.
  11. NOLOGY wires for northstar motors
  12. northstar question
  13. Code SO61? PO83?
  14. Clicking noise
  15. Huge muffler comparison
  16. Fixed the egr valve myself
  17. Does Northstar turn off cylinders like 4-6-8?
  18. Fuel Additives
  19. Problems with N* arise
  20. Diagnostic Code?
  21. Went to a mechanic today on EGR
  22. Thoughts, opinions, and suggestions on carbon deposits.
  23. Year 2000 Northstar 32V engine oil consumption problem?
  24. Spark Plugs
  25. EGR Valve , need help locating it
  26. filling coolant system after flush
  27. Tornado Fuel Saver
  28. EGR valve install question
  29. Where are my O2 Sensors?
  30. PCM? What now
  31. My timesert kit on ebay, reserve at $160!
  32. No speedo!!!
  33. Carbon buildup/ fuel additives/ opinions???
  34. 95 sts starting problems
  35. Should I fix or sell?
  36. could be 1 or 2 things idler pulley or water pump plz help
  37. Northstar driven 94 Pontiac Grand Prix GTP RWD
  38. Leaking Water Pump 1998 Deville
  39. Smoking Northstar!
  40. Engine rebuilt?
  41. Northstar Squealing noise
  42. Oil change
  43. performance exhaust
  44. '94 Concours Hard To Start
  45. P0113/P1111 - then what ?
  46. whast should a 94 north start run temp wise
  47. Changing Serpentine Belt
  48. Custom Intake
  49. Maintaining Northstar Engines *A must Read*
  50. Headgasket replacement finished
  51. N* engine mount bushings...what happens if...
  52. How to remove the belt tensioner?
  53. New Cadillac owner
  54. TO 73 code??????
  55. What are my options?
  56. 2000 DeVille - Stalling
  57. Temp Sensor
  58. Misfirin' 98 DeVille. How much $ is DTC p0300,603,1381 cost?
  59. Temperature sensor - another problem...
  60. 4 Questions / 93 STS w/ 4.6
  61. Lights flicker?
  62. lights that dim when...
  63. Glitch In 97 Concours
  64. alternator replacement part deux
  65. P086 code on 94 STS keep sme from getting it smogged
  66. Calling out 156mph
  67. Cadillac dealer...
  68. ShadowLvr400......
  69. 4.6 northstar / engine, Trans swap ?
  70. TRANSMISSION/Torque convertor problems??? HELP!!!
  71. Nitrous
  72. More on coolant issues....Long post alert!
  73. '95 STS Clearing on-board diagnostic codes
  74. Quick and Simple Question
  75. 2000 STS Oil Life
  76. Calling all North* Specialist....Changing out the Alternator
  77. Service Engine Soon? What's that Noise?
  78. Dashboard mayhem
  79. weird?
  80. Need Technical Help for Engine swaping...
  81. Anyone have an opinion on electric superchargers?
  82. Will '95 coil pack, intake or exhaust fit my '93 N*?
  83. northstar performance upgrades
  84. Exhaust manifold ?
  85. Please help! Considering a '94 Deville Concours N'star
  86. New member, trying to find out if oil burning is ok!
  87. Repair Advice Needed in Orange County, CA
  88. P030 Code on '93 STS
  89. "no battery charge"
  90. "check oil level"
  91. '95 STS showing SES code: P085
  92. Which o2 sensor??
  93. Code PO24-VSS Signal To TCC-Where is It Located At?
  94. TPS - Problems
  95. thermal meltdown of n* engine ?
  96. Are Gremlins pinching my fuel line? ARGHHH!!
  97. 2002 engine into 97 Deville?
  98. Tune up?
  99. Freeze plugs ( So called )
  100. 94 Concourse Shifting Problem
  101. I smell gas in my 95 concours
  102. message
  103. update on my 97 concours
  104. NA power out of a North*?
  105. 2002 what does loss of dim communication?
  106. Turbos put back?
  107. Leaking Heater Core in 1999 DeVelle
  108. Overheating: Am I screwed?
  109. Bolting filter right on the motor
  110. 94 Eldorado Oil level sensor problem
  111. o2 sensors!!!!!! argggggggg
  112. Help Codes Driving Me Insane
  113. Funny Smell
  114. 94 Seville STS History Codes???
  115. Emissions Code on 1996 STS
  116. Real unhappy with (my new) used caddy - Can't ID the DTC's
  117. Opinions on possible purchase 91 Deville
  118. Signs you need a tuneup?
  119. R/r water pump
  120. Help Me!
  121. Hard Starting STS
  122. OBD2 Reprogramming
  123. Chip or no chip?
  124. Northstar R&R Book Times
  125. Northstars & oil consumption...are there "good" & "bad" motors?
  126. 275hp to 300hp head swap question
  127. Northstar Aftermarket Support
  128. Do Northstars burn oil fast???
  129. Help!!
  130. Northstar overheating
  131. Most common problems with NS motor
  132. Engine size ?????
  133. What is the deal with the Crank Position Sensor and...
  134. sneaky coolant leak, Northstar
  135. Bad plug wires get you crazy codes
  136. stupid dipstick
  137. N* Head Gasket repair part I/ Remove engine
  138. idle speed adjust?
  139. Belt Question
  140. Emissions System
  141. 99 SLS probelms
  142. help with codes?
  143. Head Work
  144. New person here - piston replacement question
  145. How to get to plugs on 00 STS?
  146. 1995 SLS Engine and Trans
  147. tps 1995 sts adjusted
  148. are the '93 and '95 northstar computers the same?
  149. Cracked Water Pump Housing Northstar
  150. Erratic fuel level gauge & a few other ???
  151. Time serts head gaskets and cadillac refunds
  152. 1990 Sedan Deville Valve Job
  153. Limited slip...sort of
  154. Octane reading
  155. Check Oilk Level wont stop
  156. Please help..engine coolant ?....
  157. Traction Control on STS ???
  158. 96 Seville, Check Engine Light, New owner?
  159. Help with cooling system
  160. ? on seville northstar motor?
  161. Help! I have a 1997 Concours(traction c) I would love to know where this wire goes??
  162. maintenence records?
  163. rear windows fog up
  164. Northstar - Golf swap
  165. PCM codes
  166. 1997 Deville problems
  167. Smelling Coolant inside - 93 STS
  168. Battery Replacement on 95 STS
  169. Service Brake Fluid Switch
  170. Transmition shifting ?'s
  171. Engine cutout 93STS north*
  172. Oil Life Message Problem
  173. Can I get some pictures (N* mounting)?
  174. OBD codes
  175. 95-sts wont start
  176. idle sts-95
  177. Anyone know where I can find cheap o2 sensors?!
  178. So....someone wanna rent me a timesert kit?
  179. Ignition module failure?
  180. Need help understanding a code
  181. Best oil for Northstar engines?
  182. Northstar questions: engine and tranny mounts
  183. Service Engine Light
  184. Idle speed
  185. Intermitant DTC P1416, where do I start looking?
  186. phenolic spacers cleaning
  187. Regular Unleaded
  188. Throttle Body
  189. 97 Concours....SOLD!
  190. Help Codes
  191. Thermostat
  192. 4.0/4.6 Combustion Chambers
  193. Intake air sensor / resistor mod
  194. valve job? something burning......
  195. Easy method of telling you need a coolant change!!!!!
  196. 97 dedan deville speedometer display out...
  197. 4.6L engine knock at idle
  198. High Performance driving
  199. Starting Issue
  200. High octane
  201. 4.6L engine knock at idle
  202. Headgaskets
  203. hard starting, won't pass smog symptoms
  204. Info on converter lock,,code PO39
  205. Northstar engine numbers
  206. Locking converter/check engine SOON
  207. How to replace front motor MOUNT
  208. can any one help
  209. Motor Rocks
  210. Torque converter lockup?
  211. Help!
  212. Regular Gas
  213. Nitrous Kit for Northstars - It exists
  214. why do people tell me northstars are junk?
  215. Coolant Loss
  216. VERY slight valve knock on '98 STS Northstar?
  217. Won't shift out of 1st gear
  218. Let's get some performance parts!
  219. Just how fragile are they?
  220. experienced mechanic in Los Angeles
  221. RWD 5-speeds
  222. Let's get an OBD Programmer...
  223. Limiters on 96 STS
  224. 1996 northstar in 95 eldorado - Strange things happening!
  225. Technical Photo Section?
  226. service engine light is on
  227. engine compatibility
  228. code help please
  229. 99' STS low-end torque is sluggish?
  230. Blessed With Head Gasket Leakage as Well...
  231. timesert kit
  232. performance pcm/ecu mods ODB II (96+ ) (i.e. 1999 sts)
  233. Can the 300 HP be swapped with 275 HP motor?
  234. North star motor swap
  235. Diagnostic codes and running rough
  236. cam timing tool
  237. Hard Shifting Transmision
  238. Squeek, scrape, whir.
  239. transmission removal in 94 eldorado???
  240. 2001 seville sparkplug location
  241. need advice-- cooling
  242. engine removal and install procedures
  243. Temperature problem???
  244. Starter replacement, what is the easiest way?
  245. Bearings?
  246. are northstars interferene engines?
  247. northstar head warpage?
  248. "LOW ENGINE COOLANT" came on...
  249. timeserts
  250. Northstar idle speed motor instsall