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  1. V

    Overboost at 2psi?

    Turns out somebody removed the solenoid. Apparently it's also not turned off in the ultrachip. It's always fun buying a car that somebody else has already started to modify.
  2. V

    Overboost at 2psi?

    Another intelligent move by GM. Thanks for the heads-up.
  3. V

    Overboost at 2psi?

    Wonderful! Thank you very much. I've done some searches through parts stores and haven't had any luck looking for a wastegate solenoid (in case it needs replacement). Does it go by any other name?
  4. V

    Overboost at 2psi?

    I'll look into that tomorrow. The car is my dad's at his house. Does anybody know the resistance value range of the solenoid?
  5. V

    Overboost at 2psi?

    Nope. It's not going into limp mode. The car runs fine. It still accelerates fine.
  6. V

    Overboost at 2psi?

    87 Grand National Code 31 - Wastegate failure/turbo overboost
  7. V

    Overboost at 2psi?

    87 GN. I'm getting an overboost code at only 2 psi. The aftermarket gauge and dash indicators both agree. I've been searching and have only found overboost issues with high boost numbers. What do you guys suggest that I look at?
  8. V

    Elusive starting issues

    Turns out the problem ended up being a bad battery. Who would've figured.
  9. V

    Elusive starting issues

    Have not checked the cam sensor yet. We have replaced the coilpacks. Ignition module is fine. We checked the grounds in the "D" connector harness at the back of the ECM on several of the "screwy" sensors and had continuity. Used a jumper cable to create new grounds between the battery and...
  10. V

    Elusive starting issues

    No ideas?
  11. V

    faulty ecm

    That's the park position. Completely normal.
  12. V

    Elusive starting issues

    Finally got some quality time in on my dad's 87 GN. The car tends to not want to start after it's been warmed up. Here's what I found. ECM 1227148 Prom ID ACXA Has Ultrachip V. CTW87.50 (set on stock setting) Fuel pressure set at 45psi (verified with 2 gauges) Has an issue with...
  13. V

    Injector pulse width at startup

    Cranking pw. Chasing down a hot start issue. There has been chip work done to it. I'm trying to find out what brand it is and who did it. Working on a previously modded car is a pain.
  14. V

    Injector pulse width at startup

    It does have some mods done to it. I'll see what I can find out.
  15. V

    Injector pulse width at startup

    What's the injector pulse width supposed to be when trying to start the car? I'm trying to chase down a hot start issue on my dad's 87 GN. According to the scan tool he's getting about 10ms. BTW - new to this site but not new to cars. I have built and still tinkering with a 92 GTA NA with...
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