akw408

I made some autotap runs today. On motor, my O2 was around 0.91. Then when I switched on the N2O, my O2 was around 0.1!! No major knock retard and everything felt fine. Well, actually, the car felt kind of down on power with N2O, like it was running pig rich. And I made 5 runs, and knock retard only occured on one run, 2 degrees, no biggie. This was the first time I used N2O in almost a year, and when I dynoed my car last time with N2O, my AF was off the charts (too rich, less than 10:1, probably much richer). Since that dyno run, I have done some motor work, including H/C. So for safety sake, I used an even richer fuel jet because I haven't had a chance to go to the dyno and use a wideband O2 sensor. So anyway, I have a hunch that I'm just running super rich, but I don't dare lean out the jet right now. Has anyone else noticed that when they run super rich, the O2 sensors drop to less than 0.1? If only I had autotapped when I dynoed with N2O last time. Thanks!

C5 YA

When I ran race gas and a 100 shot of NOS I was running super rich and ATAP showed 1.1 not .1

akw408

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ChrisB:
<strong>If you are running 0.1 on your O2's you are running super LEAN, not super rich.

I would hook up a fuel pressure guage and make sure you are maintaining pressure/volume. I would also engage the fuel solenoid separately to ensure that it is opening/not clogged.

I would not spray until you get this problem figured out!

Chris</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">So you guys think it should actually read something like 1.1 or more? I do have a FPSS that I just adjusted when I recently put back the N2O kit, so I'm sure the fuel pressure is okay. It might be possible that the fuel solenoid didn't open, but I did check to make sure the solenoids weren't stuck when I put back the kit. I'll disconnect the N2O line and use only fuel and make another run and see if it still comes up with the 0.1, if so, then I know it can't be running super lean. Thanks!

Slow Z28

iTrader: (19)

it wouldn't come back as .1 though because you aren't using the nitrous. they would remain consistent, or would go rich. just wanted to let you know <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Chris

ps- if it remains consistent, then the fuel solenoid didn't open, if it goes really rich then it did open.

<small>[ April 07, 2002, 04:45 PM: Message edited by: z28kid98 ]</small>

akw408

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by z28kid98:
<strong>it wouldn't come back as .1 though because you aren't using the nitrous. they would remain consistent, or would go rich. just wanted to let you know <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Chris

ps- if it remains consistent, then the fuel solenoid didn't open, if it goes really rich then it did open.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yeah, that's what I'm saying. If I remove the N2O line, and I hit the spray and the number changes from 0.91 (which is what the O2 was all motor), then I know the fuel kicked in. But if the number changes to say 0.1, then I know that I'm not running super lean because it shouldn't be possible. I'll give it a try later today.

Slow Z28

iTrader: (19)

<------dummy, hehehe

now i got what you are saying. your checking your autotap figures. not just the fuel solenoid. oops. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Chris

ChrisB

If you are running 0.1 on your O2's you are running super LEAN, not super rich.

I would hook up a fuel pressure guage and make sure you are maintaining pressure/volume. I would also engage the fuel solenoid separately to ensure that it is opening/not clogged.

I would not spray until you get this problem figured out!

Chris

akw408

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by z28kid98:
<strong><------dummy, hehehe

now i got what you are saying. your checking your autotap figures. not just the fuel solenoid. oops. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Chris</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">It's all good man. It's always good to have more brains to debug problems. Appreciate it. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Didn't get a chance to try the experiment today, damn tax returns. Soon.

akw408

I tested it yesterday and when I hit the switch (with the N2O off), the O2 numbers stayed the same. So then I pulled the hose off from the nozzle and manually fed a live wire to the solenoid and no fuel. So I guess I was running super lean, basically injecting N2O and no fuel. Surprised I didn't get any real knock. Maybe because I ran only short bursts so it didn't get any chance to build up extreme heat. Anyway, I consider myself lucky nothing happened. I made a new topic :

https://ls1tech.com/ubb/cgi-bin/ulti...c;f=4;t=000807