N20 Cutting out

[dukedusterwrx]

Well ever since i got this kit my nitrous has been cutting out like go fast slow down go fast slow down etc my car Always runs good without it like A+ but i ran 100 shot and first time i hit it off the line and it bogged all the way to the end and i ran a 15.2 then i thought that i may need to change out the fuel jet i was running like a 33 fuel so i changed to a 31 and lined bqck up this time i launched at the lined spun all the way down to the 60ft pulling a 2.2 60 and cutting out at the 1/8 ran a 14.80 and i thought that was pretty good but not what it should be i checked my bottle pressure and it was around 750 psi i thought that i wouldnt get traction this next race so i launched it and hit n20 about 3.8k rpm's in first and it cut out all the way through the 1/4 mile and i pulled a 15.4 so i am not sure why it is cutting out and my car died right after a pass i was idling and about 3 min later after a n20 pass my car just died and took like 4-5 sec to crank again i did not notice any smoke from the tailpipes eiter and my car still runs A+ without n20 so what should be my problem and i do not have a fpps so whats the deal i was thinkin about running a 50 shot tommorow and seing how that went and does anyone have the nx chart jet chart for our cars thanks

[12secondv6]

<blockquote>quote:</font><hr>Originally posted by dukedusterwrx:
i do not have a fpps <hr></blockquote>

Why not?????
That is the basic first safety feature that should be in ALL nitroused cars!!!
This could be a fuel issue, partial cloged line, faulty solenoid.

If I were you I would not spray again, find a place who can wide band dyno cars.
Go there, dyno it n/a and then spray it on a 50 shot. See what the air/fuel ratio is.
Or see if you have a local nitrous shop who can test solenoids

[AZ3.8Camaro]

Put a FPSS on and see if it cuts out still. If it does find out what RPMS. I had similar problems and I suspect it was my fuel pump.

[malloynx#2]

i'll bet it's your fuel system. i can spray a 75 shot fine. i put and 100 in and bypassed the fpss and i got hella misfires and the car ran like hell. since then i put in a bigger fuel pump and a boost-a-pump so i should never have a fuel issue ever again.

[slacker69]

The reason your car died is cause there was still fuel in the intake and it ignited and sent a wave of gases across the maf and the computer doesnt know what to do so it bogges out and shuts down. Maybe your fuel pump is going maybe the soliniods need cleaned. With out hard data like what you fuel pressure throught the entire run i dont know what to say. I had problems for the longest time cause i didnt know that one of my fuel fittings for the nitrous was lose and when i went WOT i would lose fuel pressure once i fixed that the problem went away. But i would look into anything.

[OneQuickV6]

Did you change your fuel filter in the recent past? You need to. Also, stick with the 33 fuel jet for the nx wet kit and 100 shot. It sounds like a fuel issue to me. FPSS would be good, wideband is also a plus. Might be time to upgrade that fuel pump oif you plan to stick with the 100 shot.

[dukedusterwrx]

well thanks for all of the input i will try some things like that i have changed my fuel filter like 3 months ago i try to change again but i will look over some things and let you all know

[12secondv6]

Keep us updated.
Good suggestions from everyone else [img]graemlins/thumbsup.gif[/img]

[dukedusterwrx]

is there by chance maybe i got some bad nitrous i was just wondering

[12secondv6]

<blockquote>quote:</font><hr>Originally posted by dukedusterwrx:
is there by chance maybe i got some bad nitrous i was just wondering<hr></blockquote>
Probably not.
There have been times where I have gone through 3 full 10 pound bottles in one week!
1 bottle lasted a 3 hour drive to vermont once.
I have never had or heard of a bad bottle of nitrous

[dukedusterwrx]

How exactly do i check and see if solinoids are clean and operating properly i dont want to take them to a shop cause i am 100% sure i can do it myself.
thanks

[12secondv6]

<blockquote>quote:</font><hr>Originally posted by dukedusterwrx:
How exactly do i check and see if solinoids are clean and operating properly i dont want to take them to a shop cause i am 100% sure i can do it myself.
thanks<hr></blockquote>
Well, if you turn the key to position 2 and hear the fuel pump turn on hit the button and you should hear a clicking sound of the solenoids (this is obviously done without the bottle attatched).

Fuel psi will drop so this method will have to be repeated if not heard the first time.

Also you can dissconnect the fuel nozzle and have the braided line just empty into a bucket. That is how you can tell if the fuel solenoid is working

When I experienced my problems I had eliminated all the other possibilites, the only other option I had was to send my TNT fuel solenoid directly to TNT and they took mine apart and told me the plunger inside had swelled causing it to partially open and close causing lean conditions :(

[dukedusterwrx]

ok i am fixing to go to autozone tonight i will buy a fuel filter and a fuel pump and see if that helps cuase it is cutting out very very bad somtimes it works and somtimes it doesnt its like it will just act like my solenoids are opening and closing really fast but i check and they are both fine any other suggestions? THANKS

[dukedusterwrx]

oh yeah i also purchased a air/fuel gauge thi sthing look awesome :eek: i mounted it tonight ill hook it up and let you all know what happens.

[12secondv6]

If you get a fuel pump get a walbro 255 lph, not stock