Nitrous not working....
Thread Starter
TECH Apprentice
Joined: May 2005
Posts: 361
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Nitrous not working.... Basically, the kit fires fine when i activate it while the car is sitting, purge works, etc. Everything works fine. The solenoids are clicking, etc. But when i go and actually drive it, it doesnt work.
The car just bogs HARD and then backfires once real loud at WOT with the kit activated. I let off obviously after that. its almost like the nitrous solenoid isnt working, and the fuel solenoid is just dumping fuel, causing it to bog and then backfire.
I just had 100 shot jets in it to try it out, and i have double checked that the jet sizes are correct.
Its a TNT F2 kit with an NX purge and an NOS fuel solenoid, btw. has a WOT switch and an MSD window switch (3000 and 7200)
So, ideas? a few people have suggested my MSD window switch might be messed up.....
The car just bogs HARD and then backfires once real loud at WOT with the kit activated. I let off obviously after that. its almost like the nitrous solenoid isnt working, and the fuel solenoid is just dumping fuel, causing it to bog and then backfire.
I just had 100 shot jets in it to try it out, and i have double checked that the jet sizes are correct.
Its a TNT F2 kit with an NX purge and an NOS fuel solenoid, btw. has a WOT switch and an MSD window switch (3000 and 7200)
So, ideas? a few people have suggested my MSD window switch might be messed up.....
well depends on which noids you have but it sounds like fuel no nitrous.. you sure both are clicking open? have u tested them? take lines off nozzles and fire outside the car to see that both are activating
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take the window switch out of the loop by putting a jumper wire between Red and Yellow wires. (assuming Red is your +12v source and Yellow is your system "activate" wire). I'll bet your window switch is either not wired correctly or not working. Tach wire correct? On/off RPM?
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TECH Enthusiast
Joined: Sep 2004
Posts: 564
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From: Omaha, NE
We had a customer come to our shop with the same problem, had solenoids reversed meaning fuel plumbed to nitrous sol and vice versa. At 900 psi, the fuel solenoid was physically locked closed. Of course they both worked when testing with no pressure.
Thread Starter
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Joined: May 2005
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Originally Posted by dynocar
We had a customer come to our shop with the same problem, had solenoids reversed meaning fuel plumbed to nitrous sol and vice versa. At 900 psi, the fuel solenoid was physically locked closed. Of course they both worked when testing with no pressure.
On The Tree
Joined: Jul 2006
Posts: 164
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From: houston, TX
I've had this same problem. Good chance your nitrous solenoid wont open under pressure. I've had this happen a few times, the larger solenoids are more susceptable to this, I've had .125 orifice solenoids not open above say 1100psi several times, but my small solenoid on my dry kit will open all the time at 1200-1300 psi.
Thread Starter
TECH Apprentice
Joined: May 2005
Posts: 361
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Originally Posted by nate-roth
I've had this same problem. Good chance your nitrous solenoid wont open under pressure. I've had this happen a few times, the larger solenoids are more susceptable to this, I've had .125 orifice solenoids not open above say 1100psi several times, but my small solenoid on my dry kit will open all the time at 1200-1300 psi.
Im gonna try the window switch bypass tomorrow.
