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  1. Advice needed! Turbo QR exhaust

    B15 Sentra (2000 - 2006)
    Hey guys, so I'm looking for a little input from anyone who has a turbo spec or knows a thing or two about exhaust tones. I currently have 3" exhaust with just a straight through glasspack then a straight through flowmaster style muffler, which has started producing awful tones and has gotten...
  2. Modern Engine Electronics - How It Works

    Troubleshooting and Support
    Since becoming involved with the B15 forum I have noticed that many of our members spend a lot of time and money replacing parts to diagnose either running problems or sensor problems with their cars. I thought that perhaps I could help some of you understand how the powertrain electronics work...
  3. 02 QR25 tuning help....I'm stuck

    Tuning & Engine Management
    I've got a ton to say, tons to ask, and tons to explain; however, let's start at the core of everything. I am a built and boosted QR25DE. The bastard year....2002. I'm on a Precision 5831. I am broken in, have injectors ready to be put in, and ready to tune. I just this past week discovered...
  4. QR25DE Driving With Butterflies Open vs Closed

    B15 Sentra (2000 - 2006)
    A little bit of a background: My power valve butterfly solenoid does not activate, and it stays closed at all times. I will be remedying this issue soon. I recently confirmed this situation when I mounted a light and camera in the engine bay while driving. When I put my foot into it, the engine...
  5. QR25DE OBD TROUBLES !!!

    B15 Sentra (2000 - 2006)
    Ok guys I'm new on here, i bought a swapped 2000 1.8 with a qr25 /6speed with all the SER fixings, got a new motor in everything runs fine, now my OBD port won't work and i want to make sure everything works good but can't because it won't connect. any ideas? anyone do this swap before?
  6. QR25DE Pulley/Belt problems

    General Maintenance
    Okay so about a month ago, I started to get a whining sound from my serpentine belt. Being lazy, I kept putting off looking at the pulleys, and now, well yeah... This morning I started her up and the whine had turned into a much louder groaning noise, with a vibration I could feel in my...
  7. 04-06 No Start and Slow Cranking; Ideas Welcome!

    Troubleshooting and Support
    Hello everyone. Here's the story, about a year ago my car had an intermittent start issue where sometimes the car would randomly crank, but not start or fire in any way. This would only happen about once a week. It would happen whether the engine was cold or hot, and I would just remove the key...
  8. 02-03 Has anyone manufactured a forged short-stroke crank for QR25 instead of using SR20?

    B15 Sentra (2000 - 2006)
    It seems like if you want to de-stroke your QR25, the only viable option is to fit an SR20 crank in there. Has anyone manufactured an aftermarket forged short-stroke crank for the QR25?
  9. 03 qr25 high idle fluctuation need help

    Troubleshooting and Support
    Problem: After this years rebuild/reseal etc. Car was running fine (took it up and down the lot at work a few times did a few pulls up to 1-2psi boost..short distance). No real problems showed up in about an hour of playing around. Took the car out to storage (vehicles in an unheated garage...
  10. 07+ WTB:07+ connecting rods

    Parts Wanted
    I own a 04 QR and am looking for connedting rods. preferably 07+. i live in gainesville florida, 32608. pm with price plz.
  11. WTB qr25 block between Nashville TN and Louisville KY

    Parts Wanted
    I need a 02-06 qr25de block to rebuild. I live in Bowling Green, KY so if anyone can hook me up let me know. TIA
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