I took my nos sys. off my 98z and put on my 95z. It worked just fine on my 98. Both cars were stock. I just had about 50 shot on the 95 to start off. my pressure was at 8psi. first time sprayed it at full throttle at about 3500 rpm car acted like it went real lean and was back firing. then raised pressure to about 10psi. sprayed same way as before same result. what do i do. also need jet sizes for 125 shot if i can get it running.

 

I assume it's a dry shot. But I'm not clear on what is at 8-10 psi. Are you saying that's your fuel pressure? Or n20 pressure? I'm not familiar with dry shots, but that sure doesn't seem right for either fuel or N20, please be more specific.

 

this is a wet fogger kit. the nitrous was at 800 pounds of pressure the first time then at 1000 pounds of pressure the second. I have the fogger nozzle set up right in front of the throttle body. mounted in the rubber elbow between mass air and throttle body.

 

I thought a fogger system was built into the intake to spray directly down each intake runner?? If you said you had 8 or 10 psi on the fuel then you have a major fuel delivery prob. You should be around 40-42psi, thats your prob. right there if thats what you were referring to.

 

the fogger nozzle does not have to be mounted on the intake. If you mount it right before the throttle body then it will work. I was reffering to the nos when i said 8-10psi. I meant 800-1000 pounds of pressure. the fuel is at 38 psi thought. I have a fuel pressure regulator on the way. it is adjustable so maybe if i get enough fuel going to the injectors it will eliminate my problem. Unless you know of anything else that may be causing my problem.

 

I may be all wrong here, but with a dry kit and no fmu don't you spray before the maf?

 

this is not a dry kit. it is a wet kit.

 

Have you tested the fuel soliniod, does it open and pass fuel?
38lbs fuel and 1000 n2o, it should work. Do you hacve a fpss? is it set to high?

 

yes I check the fuel silenod it works fine. as far as the fpss not sure what u are talking about.

 

fpss is a hobbs switch that well shut down the system if the fuel pressure goes below a preset value, it installs in line on the fuel supply side.
If it worked on your 98 and you installed it the same way on the 95? I would think it would be working ok. Blow compressed air thru the lines to make sure you didn't pick up any debris, are the jets installed on the correct side??
Try a run with the bottle off and see if you go super rich???

 

no i dont have a fpss. jet are the same as i had on my 98 when it was working fine.I'm going to try a pass with the bottle off. there is a possibility of debris in the line conector on the bottle was cross thread thanx to my buddy. i just tried a pass in the car with the bottle off it didnt go rich at all but acted stronger

 

That is strange as he!l. Do you have a fuel pressure test gauge? Hook it the shrader valve then tape the gauge end to a wiper arm and make a wot pass and see what the fuel pressure is doing? It sounds like your lean na if the 50hp fuel jet made the car feel stronger. Maybe try a 100 or 150 fuel jet on a fuel only run. Does the car run good na?

 

did you pull a plug after your first pass when you said it "felt" lean?

make another pass wi the nitrous bottle off and the system armed (so you'll get nothing but fuel )

the pull the plugs (yeah i know ****ty job ) but you should do it to see exactly whats happening .

id go with drop top and check the fuel pressure first.
then do this and if its alright after this

try another pass on spray and pull the plugs again (right after you spray it)
let us know.

jimbo

 

I tried it with sys armed nos was off. pulled plugs looked fine. went back tried a 100 shot. blew maf off blew fogger nozzle out. got lucky car seems to be fine. also fuel pressure is holding consistant.

 

What rpm did you hit it at? It sure sounds like your going lean. What are you monitoring fuel pressure with? Can you monitor fuel pressure while making a run? I'm thinking you have just enuff fuel volume to run ok na, and when you engage the n2o you go lean causing the backfire.