#1 fires then stops. Very rough idle.

[KiDoZ]

See bottom for info.

Help Engine throttle cable on passenger side not moving. when i rev the engine from the pedal or from engine compartment. the passenger side cable is not doing anything. not respeonding.. Is this normal? i can do it manually by grabbing it on left side and turning it, but not if i step on the gas pedal. doenst do anything when pressing gas pedal.
i am not sure how this should function on the 300zx nor am a a mechanic, but the car kindle started running funny. not to bad, but not smooth. help. what can i look for.

[itsa300zx]

The passenger side cable is for the cruise control unit.

[KiDoZ]

The passenger side cable is for the cruise control unit.

so i dont need to worry then?

The idle seems bouncy, you can see the shake and i hear knocking. help

[itsa300zx]

Thats right.

[KiDoZ]

Thats right.

just added video, runs a little rough, and thats what made me look under the hood.

[itsa300zx]

Do a power balance test to detemine the location of the cylinder miss.

[KiDoZ]

Do a power balance test to detemine the location of the cylinder miss.

What exactly is that? Sorry if I don't know.

[itsa300zx]

You need to do a little searching and reading:) but since I have the page open;

With the car running, unplug the coil pack connectors one at a time. If the idle changes then that cylinder is firing. plug the connector back and continue with all six. If the idle does not change then that is the cylinder to look at.

[KiDoZ]

Hmmm. I turn car on. Started on passenger side closest to window. I went to grab it and it was lose. I pushed it in and seems to idle better. I did notice that the clips were broken. Most of them on all connectors. Not a good thing. What's easy and quicker fix for that? Not sure if its fixed but the misfire you heard and knock went away.

[t.mcginley.jr]

You can get new coil pack connectors here:

http://www.z1motorsports.com/product_in ... ts_id=5001

It's really easy to depin the old broken ones and repin into the new ones. Just for an idea though, my car runs perfectly fine and all 6 coil pack connectors are broken. Go figure

[KiDoZ]

You can get new coil pack connectors here:

http://www.z1motorsports.com/product_in ... ts_id=5001

It's really easy to depin the old broken ones and repin into the new ones. Just for an idea though, my car runs perfectly fine and all 6 coil pack connectors are broken. Go figure

i was looking for that. thanks
order a set now, thats cheap. cables are fine, just bad connectors.

thanks

[KiDoZ]

Ok. Quick help here. I bought the replacement coil connectors and in process found that a few cables or wires show live wires. Not sure if this affects sparks or idle but what I need is simple. Link for replacement cables. Just getting new ones period. I assume they are called coil wires. But I'm not finding a part number anywhere. Been searching all day. Feel like a newb. Sorry. Help me someone.

[t.mcginley.jr]

If you want all new wiring for the coil packs/injectors, you need a whole EFI harness.

http://www.z1motorsports.com/advanced_s ... ywords=efi

It's not cheap though.

[itsa300zx]

If you want all new wiring for the coil packs/injectors, you need a whole EFI harness.

http://www.z1motorsports.com/advanced_s ... ywords=efi

It's not cheap though.

And not easy to install. I would of bought some connectors with pigtails and solder them on, but that just me:)

[KiDoZ]

Just found Bosch platinum plugs. That could explain the misfires some. Replacing as we speak.

[KiDoZ]

Question.
On cylinder 1. When I replace coil connector. I recall that cylinder working fine. So I am wondering if maybe I put 1 wire of the three in wrong pin hole. So help. What is the pin layout for each wire on cylinder 1 coil pack connector. I assume if factory they should be same as everyone else. So even if someone can post a close up of picture of that connector. That would help. Car runs very rough. All other cylinders run fine. Thanks in advance.

[t.mcginley.jr]

Couldn't find a pic, but try reading this:

http://www.twinturbo.net/nissan/300zx/f ... t-one.html

[KiDoZ]

Couldn't find a pic, but try reading this:

http://www.twinturbo.net/nissan/300zx/f ... t-one.html

I looked at that. The only thing I'm not sure is which wire is the outer or pin one on the pins. I can't post a picture as i don't have a pc.
If anyone out there with an 1990 NA non turbo. Need pic of coil connector. Please.

[t.mcginley.jr]

I can take a pic in an hour or so when I get out of class and go to drive my 90 NA home lol

[KiDoZ]

I can take a pic in an hour or so when I get out of class and go to drive my 90 NA home lol

Lol. Thanks. I feel it's right. But I need to make sure cause it was firing fine before hand.

[KiDoZ]

Any pictures yet???

[t.mcginley.jr]

Hey sorry about that, here's what my #1 coil pack connector looks like:

[KiDoZ]

Just as I figure. Mine is wired the same.

Ok here's what I've done so far.
1. Replace spark plugs with right ones. OEM.
2. Replace broken connectors.
3. Checked cable and its fine.

Turn car on this morning 4/24/13 and messed with connector after no response. Hmmm. After i plug back in, all six fired but then it started again to misfire. I don't think it's connector or coil as I tried another coil. Could it really be injector. I have no ideas if these are original. My guess is yes. Since I could barely get those Bosch plugs out. Any one with ideas. I'm stumped. Ready to take to shop. But I feel it's easy fix.

[t.mcginley.jr]

Oh if your injectors are stock then thats 99% your misfire problem. Have you ohm checked them yet? Each should be between 10-14 ohms.

Are the injector connectors square or oval? If square, then they are old-style and yes probably original.

[KiDoZ]

Oh if your injectors are stock then thats 99% your misfire problem. Have you ohm checked them yet? Each should be between 10-14 ohms.

Are the injector connectors square or oval? If square, then they are old-style and yes probably original.

Does that mean I have to take them out. Off??? If so. Is soon replace them if I did that. Just me.

[t.mcginley.jr]

You can ohm check them without taking them out or removing anything. Just take the connectors off of each injector and then use a multimeter to check the ohm reading between the two pins on each injector. Just like this:



Except your will still be on the engine. If the ohm reading is below 10 or above 14, the injector is bad.

[KiDoZ]

Oh. Ok. Can I even get in there. I'll take a peak then. Digging for meter now. Brb.

[t.mcginley.jr]

You should be able to get to the front 4 cylinders, but the back 2 (cyls 5 and 6) are kind of blocked by the balance tube, wire harness, etc. You might have to move some things around or take them off to get better access

[KiDoZ]

All the others are firing fine. Only number one isn't.

[t.mcginley.jr]

Did you manage to ohm test the #1 injector with a multimeter yet? that will tell you if it really is bad or not. If all the injectors are stock though, it could be a matter of time before the rest go bad