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Nitrous popping through Exhaust

 
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FATNFAST
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Joined: 24 Nov 2005
Posts: 19
Location: Indianapolis, IN.
701.72 points


1965 Ford Falcon

PostPosted: Fri Jun 08, 2007 11:42 pm    Post subject: Nitrous popping through Exhaust Reply with quote

My NOS set-up was great the first couple of times, now I'm getting a popping through the exhaust and it misses and pops on the spray. On the motor all is good. Too high of fuel pressure or too low bottle pressure????? Please Help.
Thanks,
Rick

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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Sat Jun 09, 2007 8:50 am    Post subject: Reply with quote

I would say neither. You can do a quick check of fuel pressure, but they usually just get lazy with too much fuel pressure. My guess is ignition related. Has anything else changed on the vehicle? Nitrous is very taxing on the ignition system. I would just look at everything from cap to plug real close. If wires are several years old, maybe think about a new set, basically a meticulous tune-up to start with then move to other stuff. Clay
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William Jones
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Joined: 30 Jan 2006
Posts: 823
Location: Lake city, FL
28541.86 points


1971 Ford Mustang

PostPosted: Sat Jun 09, 2007 9:05 am    Post subject: Reply with quote

If the plugs are old and the gap is getting to big from being worn it will cause that problem at higher rpm. Also if you are getting coolant in the cylinder it will cause it also. I would check the plugs and pressure check your cooling system. It only takes a little bit of coolant to cause this so it wouldn't effect you when you run on motor. It is usally an ignition problem like Clay said I would start with the plugs because Nitrous is extremely hard on plugs.
Later Bam

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Paul P
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Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Sat Jun 09, 2007 10:38 am    Post subject: Reply with quote

Popping out the exhaust is generally a rich condition. I had a similar condition generated by my fuel system getting false tach signals and injecting to much fuel. I changed valve springs, tune-up parts but it was the tach signal that was doing it. I ended up finding the problem by throwing a carb on it and no more popping out the exhaust. I then threw a tach adapter on the fuel injection trigger and the problem was fixed.
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wagon train
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Joined: 07 Jun 2007
Posts: 258
Location: Orange City, FL
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1983 Mercury Capri

PostPosted: Mon Jun 11, 2007 8:55 pm    Post subject: Reply with quote

also If your plate is installed upside down.
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FATNFAST
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Joined: 24 Nov 2005
Posts: 19
Location: Indianapolis, IN.
701.72 points


1965 Ford Falcon

PostPosted: Mon Jun 11, 2007 9:18 pm    Post subject: Reply with quote

I found by changing out my plugs, that the plugs were bad. They didn't look bad. They were dark around the base and a light gray around the top. I guess NOS eats plugs quicker than I thought! hehe. Damn, before I thought the plugs, I had checked MSD ground, Cap & Rotor, MSD retard box, Coil, Wires. That's how good the plugs looked. Anyway Nitrous kills plugs!
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