S2000 Under The Hood S2000 Technical and Mechanical discussions.

Misfiring when using nitrous

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Old Oct 24, 2016 | 02:29 PM
  #11  
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No check light came on on that last pull when I heard the misfire
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Old Oct 25, 2016 | 04:07 PM
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whats the A/F looking like right after you get off nitrous?

I don't have experience with spraying upstream of any intake sensors. I always did direct port injection. That's why I ask that question, the car might sense the nitrous and then cant readjust quick enough(that is a complete guess though)
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Old Oct 26, 2016 | 03:34 PM
  #13  
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Originally Posted by Charper732
whats the A/F looking like right after you get off nitrous?

I don't have experience with spraying upstream of any intake sensors. I always did direct port injection. That's why I ask that question, the car might sense the nitrous and then cant readjust quick enough(that is a complete guess though)

To be honest I'm not sure what it is when I let off. I usually just toss the car in neutral after a spray.

My nozzle is right next to the air fliter on my k&n. I always wondered if the nitrous and fuel mixture will get sucked into the valve cover hose and air pump hose. At those point I think I'm done with nitrous. It's getting cold here and Im putting away the car so I can just plan something new.
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Old Oct 26, 2016 | 04:13 PM
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Do you have a picture of the setup? I was spraying 6" from the throttle body. Basically right before the FIPK curved towards the filter. Made sure to also have the nozzle faced towards the buttefly. Not sure if any of that is making a difference.
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Old Oct 26, 2016 | 04:28 PM
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In your plug picture, the electrode etching is a result of the plug tip glowing yellow until in melts (plug too hot) this happens during WOT operation.

During normal operation, the plug will get a coat of "normal" deposits (light brown, slight black)
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Old Oct 26, 2016 | 09:44 PM
  #16  
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Originally Posted by S_DosMil
Do you have a picture of the setup? I was spraying 6" from the throttle body. Basically right before the FIPK curved towards the filter. Made sure to also have the nozzle faced towards the buttefly. Not sure if any of that is making a difference.
I'm pretty sure I have it aiming the right way. Here's a pic of the current set up. Let me know what you think.

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Old Oct 27, 2016 | 10:03 AM
  #17  
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Yeah, not sure if having it that far back would cause issues. I had mine a lot closer to the throttle body. Is the bottle facing the correct way with pick up tube at its lowest point?
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Old Oct 27, 2016 | 10:21 AM
  #18  
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I wonder if your getting some map and TPS flooding. That aside, this isn't the best most reliable way to get proper distribution to all your cylinders such as tapping the manifold runners and doing a multi port.

The SOS TB is a re worked OEM unit which not only has a bored out larger opening, but is fitted with proper seals to protect the sensors from getting contaminated by fluids such as meth injection, fuel or nitrous. If your going to stick with a single port spray such as this, Id recommend running an SOS TB to either alleviate current, or future long term issues. .
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Old Oct 28, 2016 | 01:07 PM
  #19  
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Originally Posted by S_DosMil
Yeah, not sure if having it that far back would cause issues. I had mine a lot closer to the throttle body. Is the bottle facing the correct way with pick up tube at its lowest point?

yea the pick up tube in the bottle should be point the right way. learned my lesson couple years ago about this in my integra. I just left the bottle on he floor in he back seat and never sprayed right. you think putting my nozzle closer to the tb will solve my problem?
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Old Oct 28, 2016 | 03:33 PM
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Originally Posted by chubbys2k
yea the pick up tube in the bottle should be point the right way. learned my lesson couple years ago about this in my integra. I just left the bottle on he floor in he back seat and never sprayed right. you think putting my nozzle closer to the tb will solve my problem?
honestly I can not say for sure as I'm no expert. Just giving you my results when i went this route. Maybe do a compression and leak down to make sure the motor is healthy before any more testing.
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