NITROUS. Is my wiring wrong. PLEASE HELP - Mustang Evolution

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Old 02-16-2014, 03:39 PM   #1
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NITROUS. Is my wiring wrong. PLEASE HELP

So here is the exact way I wired my zex wet nitrous kit using a msd digital window switch pn# 8969. I've looked all over the internet at wiring diagrams. And they are all a little different. I can not get it to spay any nitrous. Both the nmu and the window switch have power. They are both set with the proper settings but it will not activate. What in the hell am I'm doing wrong. I've been messing with this for over 2 weeks in my spare time. And it still will not work. I made this drawing of the exact way that I've hooked it all up. Please tell me what I'm doing wrong.
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Old 02-16-2014, 03:44 PM   #2
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Here's the set up.
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Old 02-16-2014, 09:17 PM   #3
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Are you picking up your tach signal from one of the coil negative wires (ones with stripes)? I used the falling voltage signal (brown wire in tps harness), on my nitrous setup. Some people use the rising voltage signal wire instead though. With that being said, did you program your window switch to recognize the appropriate tps signal (falling or rising voltage)?
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Old 02-16-2014, 10:19 PM   #4
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Quote:
Originally Posted by NoSlo5oH View Post
Are you picking up your tach signal from one of the coil negative wires (ones with stripes)? I used the falling voltage signal (brown wire in tps harness), on my nitrous setup. Some people use the rising voltage signal wire instead though. With that being said, did you program your window switch to recognize the appropriate tps signal (falling or rising voltage)?
Yes that's all done correctly. And the ws does read the rpm spot on. I think my problem is the hook up of the relay. It got to be wired wrong. Does this look wright
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Old 02-17-2014, 07:29 AM   #5
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Try to eliminate some things. Ground the wire going to the MSD and operate the switch manually to make sure the relay is working.
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Old 02-17-2014, 10:08 AM   #6
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Neither solenoid is clicking correct? You said it isn't spraying N2O, but is it spraying fuel? If you're unsure check your A/F when the Window Switch is supposed to kick in. If it drops to 10.0 you're spraying Fuel only.

If not, then we will proceed from there.
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Old 02-17-2014, 04:49 PM   #7
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Here's the diagram that I used for my nitrous install. Dave at Nitrous Outlet sent it to me.
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Old 02-17-2014, 08:13 PM   #8
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I finally got it using the above hand drawn sketch. I think I'm going to do a full how to on this topic from start to finish. Seems like everything I read is people having problems installing nitrous using a zex wet kit, msd window switch and relay.
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Old 02-05-2017, 12:47 PM   #9
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I need help with my zex kit, I used the green and violet wire (rising voltage) but the solenoids activate at half throttle.
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Old 02-07-2017, 04:01 PM   #10
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Quote:
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I finally got it using the above hand drawn sketch. I think I'm going to do a full how to on this topic from start to finish. Seems like everything I read is people having problems installing nitrous using a zex wet kit, msd window switch and relay.
Your diagram is actually pretty easy...be glad you didn't have to do my install hahaha
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Old 02-11-2017, 02:48 PM   #11
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After frying a couple solenoids due to malfunctioning TPS on my NX kit, I just chucked in and went with a manual activation switch like my dragbike has. Zero problems since then....
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Old 02-15-2017, 02:33 PM   #12
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After frying a couple solenoids due to malfunctioning TPS on my NX kit, I just chucked in and went with a manual activation switch like my dragbike has. Zero problems since then....
I have mine set to a micro switch...reliable activation every time, windows switch will prevent early activation so zero issues there. Not to mention micro switches hardly ever fail...
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Old 02-17-2017, 08:36 AM   #13
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I have a momentary toggle switch I hold in my right hand and as I mash the gas out of the hole, I punch the switch. That's how I get 1.5 sec 60 foots out of a stock torque converter.
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