i have 96 gt i just put nitrous on it . its a compucar kit and i have it jetted for 90 hp. i use a msd window switch and a wot switch . well i went to try it today and its not working right .it will kick in for a second and then my motor will start popping ... i checked to make sour i got right jets in and i do . ihad 950 psi in bottle . any help would be great i just got everything done and was planning on going to track tom.

 

could this be from haveing air the the nitrous line i dont have a purge kit

 

well i tried a few things , i disconnect my window switch and i grounded the solenoids to a ground and turned my arming switch on and when i push the wot switch both solenoids click so im good there .... could it be that my nozzle is to far away its about 10 inches from the throtle body.

 

well i was messing aroung with it a lil more and i noticed when i push the wot switch the lights dim with the motor running . and then i blew the fuse , i have it wired to cigar lighter , the arming switch and the window switch both , the fuse is only a 30 amp. could this be a problem .

 

and my bottle warmer is also on same fuse and i had it on

 

Not to be a dick, but can't you keep this all in 1 post? LOL

Good luck though, Spike should be able to help and who ever else.

 

i also checked the window switch and its giving ground for what i have it set at

 

Have you pulled the lines have a buddy hold them into a cup or something with a glove on, and activate the solenoids with the bottle on.

Also are you sure the jetting is correct..it sounds like you're hitting a sensor and the jetting is too rich or lean..

Also you should really put the warmer and everything on a different fuse..it sounds like its just drawing too many amps..

As far as the popping I'll almost bet that you're jetted too lean..had that issue with me... try to fatten the shot up a little bit..maybe by 1-2 jet sizes.

 

i checked jets again and they are right 33 for fuel and 46 for nitrous

 

The motor starts popping? like small backfires?

Are you using a Hobbs switch aka fuel pressure safety switch?

 

not that i know of

 

there is what looks to be ajustable fuel pressure regulator

 

You don't know if you installed a fuel pressure safety switch.

Does it look like this:


If so those cause all kinds of problems. And me I hated mine so much that I got rid of it after about 4 days of trying to make it work right. Been great ever since as long as the fuel system is good.

That's what it sounds like to me, unless the motor is actually backfiring in the motor or exhaust, which you never answered me about.

 

no i did not install one of them . the poppong it coming from motor . and today when i was working on it a lil bit i took the gas line off the nozzle and put in can and activated noids with the key on and it would only spray once . also took car to track today and the first pass i blew the intake ...and i was not using nitrous.

 

anyone???

 

maybe a weak fuel pump? I'd still re-check all of the nitrous wiring and run a separate power wire from the battery to power the relays.

 

So you blew the intake manifold not using nitrous, impossible. I am willing to bet you wired the fuel noid wrong and it was constantly spraying fuel into the intake manifold. Don't worry its happened before.

Did it really blow and break the manifold or did it just backfire? I have had a few small backfires in the manifold that never hurt it.

 

i had the solenoids lines off , it cracked near the therm. housing.

 

That's an entire different issue. That's your full plastic intake manifold getting the very common breakage right there. That's the reason Ford went to a metal coolant crossover in the late01-04 GT's. Looks like its time for an upgrade to a PI intake manifold with a metal coolant crossover. You get a better manifold that won't do that and you get some more HP too, win/win if you ask me. You also need to figure out whats up with your nitrous kit.

Did you test the nitrous noid to see if its spraying actual nitrous out when you tested it? or did you test it with the bottle closed.

 

+1 on what spike said..have you ran a test spraying the nitrous/fuel mixture into a bottle or something to be sure they are working correctly..

As I previously asked and got no response..

I'm going to say you aren't getting any nitrous to the system..

Is your bottle filled up? =)

 

yes i tried both noids one at a time and both sprayed but the nitrous had alot of air in the line at first ...and i just got a pi intake from tuff 4.6....

 

You need to test them both hooked up to make sure they are working at the same time.

 

finally got my nitrous to work , i rewired it using a relay this time and everything worked , i just tried it today with to 90 hp jets , what do i need to do to run a 125 shot ?

 

Pull it and pray lol. Whats your fuel setup right now?

 

wrong thread.

 

im not 100% sure .... i think the car had nitrous on it befor because there where holes no mount the bottle and you can tell someone tapped into the coil , but as far as i know its stock pump but there is an adjustable fuel pressure regulater and there was a fuel presssue gauge on the fuel rail . `

 

I would be worried about what fuel pump is in the car before I sprayed it with a 125hit.

 

i need more nitrous ...i went to track today and the best time i could get was 13.9 , is it me or the car.. i thought i would closer to low 13s with mods i have .. i have 4:10 gears , shorty headers , 75 mm tb, 90hp spray, short throw shifter , Mt et tires , i just thought i shoud have had better times .

 

oh and off road h pipe and flowmasters

 

Its hard to say without seeing the 60' and trap speeds and knowing the weather conditions and elevation. You have to keep in mind you have a shitty non PI headed motor so its not gonna run the times us PI headed cars run. Still I would of though you would have a better time.