260z starting problems

[Captain_Zeros]

The factory electric fuel pump has a filter in it, and if that is clogged up it'll restrict flow for the whole system, whether the electric pump is running or not. Beyond that I'm hesitant to touch this one, there isn't a lot of documentation on people using the 260Z flat-tops for much and this is a pretty non-standard setup. Not sure if they know much about flat tops either, but have you tried hybridz?

Aside, have you read the carburetor chapter of the 260Z FSM yet? Available for download here: XenonS30

Edited July 9, 2013 by Captain_Zeros

[Captain Obvious]

Where exactly is the filter screen? I ran the car with the bottom of the carb off, and the fuel was coming out the the small tube pretty steady. I then pushed the float up and the fuel stopped like its suppose to..

I'm not sure how you got the car to run with the bottom of the carb off, but whatever... Sounds like the filter screen is passing fuel and the float and valve are working. Doesn't tell you much about the level of fuel in the bowl when the float is in control though.

Here's a pic that should answer your questions:

As for the sight glass, the target level moved depending on the year, but since you're so far off the flight line, I would set them right at the center of the window and see what happens:

[Captain Obvious]

And BTW, in your application, both the sight glass and the plug covering the fuel screen are on the side of the carb that is sandwiched between the carb and the distributor. That's why I was saying earlier that you might not be able to even get to that side with the carb installed the way you have it mounted.

[260z210]

And BTW, in your application, both the sight glass and the plug covering the fuel screen are on the side of the carb that is sandwiched between the carb and the distributor. That's why I was saying earlier that you might not be able to even get to that side with the carb installed the way you have it mounted.

I opened that brass plug before, and there's nothing in there. I guess the previous owner took it out. But I think I fixed the fuel problem. I connected some vacuum line I originally plugged up, and seems to fill the filter up now. Now the car doesn't wanna idle right. It idles really low, and shuts off. I have to keep pushing the gas to keep it on. I know I'm close just gotta adjust it some.

[260z210]

So I finally got a fuel pressure gauge. And it's between 5 & 6, so I think that's pretty good. I still believe I have a vacuum problem. There's one port that I have plugged, but it's connected so some adjustment screw so I know it needs to go somewhere. In the picture it's the port that's open connected to the brass tee..

Edited July 18, 2013 by 260z210

[madkaw]

HEY

I clicked on your pic and my antivirus when crazy. That picture has a virus embedded in it. See if you can remove it.

[260z210]

HEY

I clicked on your pic and my antivirus when crazy. That picture has a virus embedded in it. See if you can remove it.

How can it have a virus it's a pic linked to photobucket ..

[Captain Obvious]

Yeesh.

You got full vacuum going to the CARB system. You got ported vacuum going to the intake manifolds which makes no sense. No idea what happens when that turbo spools up and pressurizes the intake. You got PCV coming off the top of the valve cover instead of the side of the block.

I can tell you that fitting you've got uncapped (and the screw adjust that goes with it) was originally used to control idle speed. No idea what they're doing with it now though. The uncapped hole (I think it's the one you're talking about) looks to be a air bleed. Don't know why you would need one since you've already got such a thing built into the carb.

What's the origin of that system you have? Is that a homegrown thing, or was it available as an aftermarket kit?

[260z210]

Yeesh.

You got full vacuum going to the CARB system. You got ported vacuum going to the intake manifolds which makes no sense. No idea what happens when that turbo spools up and pressurizes the intake. You got PCV coming off the top of the valve cover instead of the side of the block.

I can tell you that fitting you've got uncapped (and the screw adjust that goes with it) was originally used to control idle speed. No idea what they're doing with it now though. The uncapped hole (I think it's the one you're talking about) looks to be a air bleed. Don't know why you would need one since you've already got such a thing built into the carb.

What's the origin of that system you have? Is that a homegrown thing, or was it available as an aftermarket kit?

I got all the parts in a box, and had no idea how it worked. i just made gaskets and bolted everything up. All the vacuums hoses I ran, not knowing where any of them go forsure. The intake cover had the hose connected to it. I saw a pcv valve on the end of the tee connecting, and the hose was the right length. So I only assumed It went there not to sure. When I took off the cap on the vacuum port, it had a really hard vacuum, to where it whislted so im sure it goes somewhere, just not to sure..It does start right up ( with choke fully closed only). Just idles weird you have to mess with the choke to keep it on.

I think all the pieces where custom made, I can't find very much about this flattop draw through carb turbo set up.

[Captain Obvious]

I can't find very much about this flattop draw through carb turbo set up.

Haha! Ya don't say...

There's some stuff in there that really doesn't look right to me. I'll work up a pic with some numbers on it so we can

refer to hoses by name or by number.

In the meantime, you really need to check your float bowl setting. Use a mirror and a flashlight and see if you can get a peek. Take off the fuel supply line and large hose between the air cleaner and engine side of the carb for more room if you need it.

What's the hard-line to the turbo? Is that oil?

[Captain Obvious]

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