I just installed a nx mainline kit and before I even turned it on my fuel trims started running rich. Bank 2 at idle is off by 4-5% from bank one. I changed the plugs and took it out for a run. I am only running a 75 shot and honestly I expected more but i could feel it. my tuner said no more then 75 until we dyno tomorrow. Anyway has anyone experienced running rich after install.

Before I hooked it up I was -3 at idle and 0 at 2500. It was dialed in. Now I am -11 at idle and that is with the system off.

I appreciate any help. thank you.

 

Is fuel coming out of the nozzle with the nitrous system turned off and the vehicle running?

 

make sure your fuel solenoid isnt leaking...also if you changed plugs, make sure all cylinders are firing. the water bottle trick works great. installing a nitrous kit shouldnt change your N/A AFR.

 

Is this a new kit or used?

 

Pull your fuel solenoid apart, clean the trash out and get a new plunger for it.

 

Sorry it took me so long. I was able to resolve this. The system did not fully purge which caused it to go rich. My trims have gone back to normal. And once I got the jets worked out it is awesome. 125 is a far as I am taking it now. Although I did 397 to the wheels ona 75 shot. So that made me smile.

Thank you everyone for the help. Although I a going to clean the solenoids for good measure.

Next is a bottle warmer and a timing controller son I dont have to keep my timing so low during daily use. Any suggestions?

 

I would highly suggest one of the Lingenfelter LNC 2000 controllers. They are super simple to setup and very reliable units.

I f you are looking for something a little cheaper and you have access to HP tuners and are good with wiring you can do the IAT mod.

Here is a link to how to make it and how it works.
https://ls1tech.com/forums/nitrous-o...de-system.html

Trey