1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

need some help

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Old May 23, 2005 | 09:20 PM
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evil_motors's Avatar
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need some help

can anyone take a picture of their hoses they routed fron rats nest removal on a 79 12a? i am wondering if i did something wrong..

also does anyone have a pic of the idle speed screw i am not sure where it is on my nikki
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Old May 23, 2005 | 10:24 PM
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There are two places the idle adjust can be on a '79 carb. On mine, both the idle speed and mixture adjust screws are stacked, one on top of the other in the middle of the carb body on the drivers side. On my recently departed '79, the idle speed screw was hidden down by the accelerator pump linkage.

As for vaccum routing, I've got the factory diagram here:


If you want to retain vaccum advance at the dizzy, be sure and get two lengths of vaccum tubing and attach the pots on the dizzy to their corresponding nipples on the carb spacer. At this point, you'll want to either retain the ventilation and check valve, or purchase a PCV valve and follow any of the procedures listed in the FAQ to plumb it into your now very simple vaccum system.
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Old May 23, 2005 | 11:33 PM
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okay what is the little nub at the 7 oclock postition from the throttle opener.. ? i have the 2 seperate hoses run to their corresponding nipples.. and i have the ventilation and check valve.. but what else do i actually need?
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Old May 24, 2005 | 06:19 PM
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You should be good to go with what you have.
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Old May 24, 2005 | 10:12 PM
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okay maybe i will take a pic for you to see if you can see what i did wrong? cause if it isnt that what else would make my car accelerate like a geo metro
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Old May 24, 2005 | 11:57 PM
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Maybe you mistook a 300 ZX for an RX 7?
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Old May 25, 2005 | 04:05 PM
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i wish i had a 300zx. i love those.. but still before i did all the work to my car it used to pick up pretty well .. then i added a header.. direct fire ignition.. rats nest removal.. and now it acceleerates like crap
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Old May 25, 2005 | 05:52 PM
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Originally Posted by evil_motors
i wish i had a 300zx. i love those.. but still before i did all the work to my car it used to pick up pretty well .. then i added a header.. direct fire ignition.. rats nest removal.. and now it acceleerates like crap
A-HA!

Have you checked all your wiring for direct fire? Double Checked? Triple Checked?

Trust me, there is so much potential for disaster when doing ignition mods that you can't be too careful. Dollars to donuts your problem is due to the ignition mods, not the rats nest.
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Old May 25, 2005 | 06:46 PM
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could be could be... mine is simple though.. i have the second gen direct fire system.. so i only have a few wires.. and everything is set up like it should be.. but i will double check..
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Old May 25, 2005 | 11:42 PM
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You don't really want a 300 ZX. Not the NA one at least. Maybe I'm just bitter because mine was one in a series of cars that I lost.
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