: Northstar Engines and System Technical Discussion



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  1. No pcm data
  2. No pcm data?
  3. WIll a 98 vin 9 motor go into a 94 STS
  4. another newbie HG question
  5. NEW - 2002 Head Gasket Failure - Best Fix...
  6. Failed Smog Emissions Northstar
  7. What could it be?
  8. Exchange fluids how often?
  9. Tuning thread. Disappointed, but I understand.
  10. looking to buy a Caddy
  11. AC Delco platinum plug gap settings for N*
  12. how do i get my car to northstar preformance, uh cheaply?
  13. Engine 'misses' at stoplights
  14. where to get my head gasket repaired?
  15. Engine Shaking
  16. 4.6 Prevention and maintenance for longer life IE head gaskets.
  17. How to properly switch from red to green in a 2000 STS
  18. Water Pump Issue
  19. Lucas Oil Stabilizer
  20. Rough idle and low speed chug
  21. barS headgasket repair, has anyone tried it?
  22. Secondary Air Injection Check Valve... Bent?
  23. 2000 STS motor mount help?
  24. Oil pressure dummy light flickers...
  25. Head Bolts...
  26. Slight stumble, no codes
  27. 97 Deville wont start in the morning
  28. Stud Kit Help
  29. A kitten caused my Serpentine Belt to come off
  30. Check Coolant Level
  31. Cleaning Heads and Block
  32. Over Heating... HELP!!!
  33. 2001 deville rough idle
  34. engine grounds
  35. manifold blowoff
  36. sealant for blown heads?
  37. 1994 STS Overheating (I think)...
  38. Block Identification Numbers
  39. Snapping noise when coming to a stop..Answered Finally!!!
  40. Overheating Eldorado Help
  41. need some help
  42. 05' STS. Little help with P0102 please
  43. 2000 DTS P0300 code
  44. Head gasket repair
  45. P041 1994 deville concours
  46. Quick Oil Question
  47. rough idle, no codes, rough start
  48. coolant leak
  49. STS Radiator Hose Replacement
  50. 95 Eldorado ETC - Cooling system
  51. power steering line: o-ring?
  52. broken bolt in oil pan
  53. Water pump & crossover gasket - $$$$
  54. Help Me Please
  55. Rad Cap PSI was wrong
  56. Coolant Leak. Where's it coming from?
  57. Water pump Purge line?
  58. 5w30 or 0w30
  59. Destroying a N* Engine
  60. N* engine removal - newbee
  61. 02 DHS overheating
  62. TCC Stuck Off
  63. No clue what to do. Northstar blues
  64. problem with map sensors
  65. 2001 caddy sts seville tranny
  66. What is going on with the car?
  67. Spark Plug Wires
  68. "Hush" or "Gasp" Before Expected Throttle Response
  69. my 93 ETC Eldorado N* has a question for you guys
  70. Which spark plugs to buy?
  71. Thoughts on Dex-Cool and Head Gaskets
  72. 2001 cadillac deville small hesitations
  73. Normal Operating Temperature?
  74. Intermittent starting issue 97Seville SLS
  75. Trouble finding exhaust leak 99 Deville Y motor
  76. Is 235 too hot for a N*star on hilly roads?
  77. Spark Plugs ACDELCO or somthign els ?
  78. Good mechanics to fix head gasket in Oceanside, California area
  79. rough idle, only when in gear and brake on
  80. The first head gasket failure - 1 out of around 90 or so
  81. Tranny problems?
  82. how to install serpentine belt on 98 concours
  83. engine swap
  84. Why high fuel pressure?
  85. 1997 Northstar low speed hesitation and noise
  86. 2001 DeVille DHS / North Star motor losing power
  87. Air-Dam / Belly Splash Guard importance on cooling your N*
  88. Make Your Own Damn Motor Mount
  89. cooling fans inop p01660
  90. Hard shifting 1-2 Help!
  91. Fabricated Torque Strut for the 2000+ Northstar
  92. Horrible Engine Bucking 93 N* Allante
  93. 1998 Seville STS Performance Engine Build - STAGE I
  94. My pulley melted
  95. 01 Deville issues, no codes, no check engine light
  96. '96 Deville Coolant Change
  97. Overheating
  98. White smoke after changing starter (by removing intake manifold)
  99. No current codes but...
  100. N* Powered Camaro
  101. Strange coolant/heat issue 99 STS
  102. 1998 STS engine full of mystery sludge?!
  103. Rough idle-stumble on accel
  104. 95 Eldorado 4.6L Engine stalls
  105. Oil in intake manifold 4.6 1993
  106. 98 Deville Concours Preformance Exhaust???
  107. Engine year compatibility
  108. Sucessful Northstar head gasket repair in a bottle
  109. PCM 09354896 code DCHJ
  110. 1997 4.6 eldorado up hill over heats
  111. fuel injector ohms
  112. 93 sts fuel rail removal tools
  113. Air ride compressor
  114. Overheating??
  115. Codes P0122 and P1122...
  116. Motor mount replaced!! WTF!!!!!
  117. 1996 Seville STS O2 Sensor REMOVAL. CAN"T GET TO IT
  118. 96 Seville where's the 02 Oxygen Sensor Location?? PLEASE HELP WONT PASS EMISSIONS!!!
  119. Long road trips good for the Northstar?
  120. headgaskets a 2nd time?
  121. 97 eldorado w/180,000 miles, should i upgrade to a preformance coil?
  122. 94 eldorado 4.6 - no codes - stumbling/chugging - about to give up
  123. Car not turning over
  124. Codes 340 and 1016 + Fixed A.I.R. with new coil cartridge?
  125. Transmission issue
  126. spark plugs
  127. Yearly engine oil changes really necessary?
  128. Overheating problem
  129. maybe you all know more
  130. What Oil For Northstar Cams and Flat Tappets?
  131. 93 seville sts fuel rail
  132. rear main seal
  133. 93-99 Camshaft picture needed
  134. Seville 03 shaking problems after tune-up.
  135. is it the head gasket again?
  136. Problems with starting the engine
  137. Adding an Electric water Pump 95 Northstar
  138. 1995 northstar for sale *LOCKED*
  139. After WOT Car smells strong of sulfur , rotten eggs
  140. Dexool Questions
  141. 2002 caddy deville
  142. Limp. Mode help
  143. Lifter starting to tap and needs replacing,
  144. Reg oil or Synthetic oil
  145. Coolant Shooting Out
  146. Random light miss during constant hwy cruising
  147. Which PCM??
  148. Fuel Injector O-Rings- Where go?
  149. air in cooling system
  150. Best oil and spark plugs for the northstar 4.6L
  151. Enginge doesn't crank
  152. Help!! Engine idling with hiccups
  153. Tach
  154. the day has come: headgasket
  155. '99 Seville STS
  156. What are the differences between 99> and 00< motors?
  157. Why do these motors break rods?
  158. pretty betty deville
  159. how reliable is northstars limp mode
  160. 1999 deville almost overheating
  161. 3.71 ever better with smaller wheels?
  162. Refrigerant pressure
  163. Minor Coolant Leak
  164. 93 sts misfires, stalls, very rough idle, looking for cause
  165. Any thoughts? Code P1350 p1375
  166. Injector spec for a Y2000 N*
  167. oil cooler
  168. TPS issue: Codes P0122, P1122. Help!
  169. Need Help Installing Air Filter ?
  170. 2002 Deville coolant leak
  171. Blew the head gaskets replacing the motor
  172. 1997 deville stalling at idle
  173. bad headgasket
  174. N* running Hot, Real Hot
  175. 99 deville oil pump
  176. 2001 Northstar AIR Valve
  177. Hydraulic valve-lash adjustor evaluation?
  178. 99 deville - RFA U1000 Help
  179. 91 GMC Sierra, with a Northstar?
  180. 96 96 Northstar Noise and Oil light issue With Video
  181. Speedomoter Reads wrong
  182. 2001 Deville Falls Dead
  183. 98 sls overheating
  184. EVAP Purge Solenoid
  185. P0171, P0174 After replaced Plenum
  186. 97 deville overheating??
  187. Batteries, voltage, power, and Optima
  188. Intake Manifold Removal Snag
  189. Smoke
  190. Come for a vacation while your HG's are replaced
  191. Exhaust manifold swap?
  192. Temp Indicator Question!
  193. Does Anyone Have Any Ideas???
  194. 2001 deville misfire
  195. '98 heads and cams on a 2000 block
  196. Fuel Rail / Fuel Injector Removal
  197. No Spark
  198. Puffs of smoke while revving in park
  199. Warping the Heads???
  200. A/c Discharge Hose
  201. Northstar Valve seals?
  202. Main studs?
  203. Notice of price increase on HG replacement
  204. Mystery Vacuum Hose
  205. Bad Thermostats or blown Head Gasket??? Help
  206. timeserts
  207. Northstar Engine belt
  208. Question about Time Serts?
  209. Iridium Spar Plugs
  210. Stock crank HP?
  211. How much better are the 00+ headgaskets.
  212. 97 ELDARADO w/ blown H/G
  213. allante 9 engine swap to a y engine
  214. Weird transmission behavior - any ideas?
  215. 3" Exhaust all the way back?
  216. FWD Sump swap for RWD?
  217. Early engine number needed
  218. Low oil pressure enigine stop no start
  219. Need Motor Mount R&R procedure in Tech Tips
  220. Crankshaft Position Sensor
  221. 2002 Eldog
  222. changing starter on 1998 deville--have you done it?
  223. 01 STS - Engine cutting out on accel
  224. Ram Air set-up on a 95 STS
  225. NorthStar painting touch up?
  226. Camchain timing
  227. 03 front (left) motor mount help
  228. Oil filter IArea
  229. I may need all forum members help, especially those who have ordered the stud kits.
  230. Do NS engines have an "air regulator"?
  231. Injector Alternatives
  232. Best year for a NorthStar??
  233. How to remove oil filter adapter???
  234. 95 N* intake issue
  235. How to lock flywheel without $150 tool?
  236. 2001 Deville DTS PO300 Random Misfires
  237. Cadillac STS Coolant, service stability system...
  238. anyone ever use Engine Ice Hi-Performance Coolant
  239. 1994 cadillac sts coolant loss
  240. What size of Time-Sert I have to buy ?
  241. 96 Eldo ETC I found the ABS computer cover...how do I get in it?? Do I force it?
  242. 96 Eldo engine sputters and stalls. P0300 and P1380 Engine Misfire.
  243. 01 STS Water pump grumbling noise
  244. Replacement Engine
  245. Coolant loss?
  246. what is the difference between the concourse and regular?
  247. '97 DeVille SES but no current codes?
  248. 95 sts hard shifting/chugging trans?
  249. combustion gas test turned yellow
  250. Northstar Died? no vacuum, no compression on cyl 6.