Cheesecake 07

Wiring up a Nitrous Outlet 90mm plate on an 04z...

Using a LNC-2000 to pull timing and NOS mini controller for the window switch and WOT activation.

Pretty much finished up ...just have the TPS and Tach signal to tie into for the NOS mini controller. I've read about tapping into the PCM harness for the tach signal, I'd rather avoid this unless its just dead nuts the best option so...




In the pic, pin C(which should be the tach signal) is the lower blue'ish wire in the factory plug. The corresponding LNC-2000 wire is the dark green wire at the top. Could I tap the green wire from the LNC-2000 and avoid tapping any of the factory harness altogether?(I'd prefer to not touch the factory harness)

Sorry if thats confusing...just looking for a less intrusive way to get a reliable tach signal for a window switch.

Thanks in advance

BLOWNBLUEZ06

Yes. You absolutely can tap that signal anywhere you choose. Anywhere between the coil and the PCM.
For other readers: that's actually the coil signal to an individual coil and these cars operate sequentially as opposed to wasted spark, so the N2O controller settings are often half what you might think they should be when tapping a single coil for signal.

If you wanted to actually get the tach wire, it's a white wire that can be grabbed at the PCM, accessed by removing the passenger front wheel and the access cover behind. You can also grab that tach signal inside the passenger foot well area and driver side dash on the left side in a small harness, on its way to the cluster.

Sigforty

When I wired up my system I just tapped the wire by the PCM. It is easy to get to and being down in the fender I had less wires by the engine.

igtabg1

x3 on the white wire by the pcm, when I tapped the wire on coils for tach signal it resulted in random misfires.... hope this helps...

Cheesecake 07

Yeah your one of several that have told me they had the same issue.

Thanks guys...I yanked the wheel/tire and the close out panel. PCM is pretty easy to get to...Im thinking I'll tap there to avoid the possible headache.

Cheesecake 07

Got the kit wired up...thanks for the suggestions.

Weird issue. When I run through a gear spraying...after I let off the throttle, my RPM's will hang around 4k rpm. As soon as I turn the arming switch off...back to normal idle.

I was thinking it could be my TPS wiring however I disabled the TPS through the NOS mini controller and same issue.

Anybody ran into anything similar? I searched and had no luck. NOS(Holley) tech line is terrible...was on hold for 45 min twice. I gave up. Lingenfelter was great...pretty sure it has nothing to do with the LNC-2000(wired to pull timing only) and they confirmed this.

One or both solenoids sticking open? Kit is brand new, first time sprayed was today.

Only testing with a 50 shot...so trying to get it figured out before I go up to a 150 for the No Fly Zone 1/2 mile next weekend

Thanks in advance

Sigforty

What type of kit are you running? It could be something with the TPS signal tap screwing with the car ECM. It could be a leaking solenoid or even something in the nitrous systems is not tight letting air in.

5 Liter Eater

That does sound like the noid is staying open. I'd double check the wiring and the controller settings.

Cheesecake 07

Just tested it again. Gotta be a TPS issue. It sprays at part throttle as soon as it hits the beginning of the window(3500rpm).

Am I along the right line of thinking that it's not getting a solid TPS signal to the controller to shut the solenoids down? So as soon as it hits the window the solenoids open and keep spraying unit I have to kill the arm switch?

Im tapped into the dark blue wire on the TB for TPS. I have a FAST 92/LS2 TB set up with a Caspers harness, Caspers confirmed the wiring correlates with the factory colors, so dark blue is the correct wire from what I understand. I checked with a voltmeter and it's around 1 volt at idle and 4.5'ish at WOT. Is there a better spot to grab a signal from?

Appreciate it... knew I shoulda did a damn blower

5 Liter Eater

Some controllers assume a 5-0V TPS signal (decreasing voltage as TPS rises). This sounds like your issue. The NOS mini can be configured either way (0-5V or 5-0V).

Sigforty

I cannot help with the TPS wiring as I just did a WOT switch under my pedal. It was easier for me to put in that switch than deal with the wiring harness. If you are spraying under part throttle you definitely have an issue. The window switch is triggered by the rpm signal you tapped by the PCM and sounds like that is working.

Cheesecake 07

Appreciate the help. It was a bad TPS connection. Re-soldered it up and it works perfect.

Just hope the bottom end likes a 150 into 5th gear next weekend

Thanks fellas

BLOWNBLUEZ06

Get us some vids either way.

Cheesecake 07

Will do...Go-Pro is dialed up already