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missfires and nitrous

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Old Dec 21, 2009 | 05:22 PM
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Default missfires and nitrous

what would happen if a car missfires while using nitrous? the reason i ask is i have a slight innermittent miss that i just cant seem to find. i really want a 150 shot and dont want to find out the hard way. i am trying to fix the miss but iv replaced every part of the ignition system and alot of others.
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Old Dec 22, 2009 | 11:01 AM
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Originally Posted by ElkySS
what would happen if a car missfires while using nitrous? the reason i ask is i have a slight innermittent miss that i just cant seem to find. i really want a 150 shot and dont want to find out the hard way. i am trying to fix the miss but iv replaced every part of the ignition system and alot of others.
Everything is amplified on forced induction. Think about the additional content you're pushing into each cylinder. Not having it fire and or firing at inopportune times is asking for trouble. Fix your miss than spray it.

Nick
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Old Dec 22, 2009 | 03:39 PM
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well im planning on fixing it first. i just want to know what happens if it comes back while on the bottle
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Old Dec 22, 2009 | 10:54 PM
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check the spark plug wiring
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Old Dec 23, 2009 | 10:04 AM
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I completely agree with Nick@HSW.

If you have a missfire before adding spray, you are simply going to amplify it and possibly hurt much more if you try to spray on top of it. You are increasing the cylinder pressures much higher than NA, you want everything in tip top shape before you add the nitrous variable into the mix.

Even when the car is running correctly, you can still have an issue. I had a missfire when I was spraying a 125 on my '94 Z28 and it ended up making a 'self aligning' rocker, un-align itself.


Moral of the story: Definitely get your stuff double checked and buttoned up before spraying. Trust me.

Last edited by WhyHelloOfficer; Dec 25, 2009 at 06:13 PM.
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Old Dec 24, 2009 | 02:34 PM
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mine missed on a 200 and bent a valve after a gigantic nitrous backfire...
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Old Dec 26, 2009 | 10:55 PM
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hey man def get that miss fixed first,ive been turning wrenches for 15 years which is nothing compared to some guys on here but for a little advice there are probably a million ways to make a car miss, if u have replaced alot of your major components start looking for the little things, start checking your powers and grounds at the pcm before you replace anything else, you could have an intermittent short to ground on one of ur injector circuits.
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Old Dec 27, 2009 | 10:27 PM
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Originally Posted by WhyHelloOfficer
I completely agree with Nick@HSW.

If you have a missfire before adding spray, you are simply going to amplify it and possibly hurt much more if you try to spray on top of it. You are increasing the cylinder pressures much higher than NA, you want everything in tip top shape before you add the nitrous variable into the mix.

Even when the car is running correctly, you can still have an issue. I had a missfire when I was spraying a 125 on my '94 Z28 and it ended up making a 'self aligning' rocker, un-align itself.


Moral of the story: Definitely get your stuff double checked and buttoned up before spraying. Trust me.

Lucky that's all that happened.

Nick
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