Dirty injectors!!!!!

[anthony280z2+2]

Im doing some body work on my 280z so its been sittting for about 3 months.

yesturday i tried to turn it on but the injectors were not passing any gas. never cleaned the injectors before and really never tried. can anyone tell me how to clean them or give me pointers on CLEANING AND REMOVING THEM. by the way the car was working perfectly before i it stood still for a few months.

[hls30.com]

Taking the injectors off with the fuel rail is the easiest way I have found. remove the rail and injectors as an assembly, then disassemble the assembly.

For cleaning the injectors:

I have been meaning to write up a technical article for the simple and cheap procedure I have used for years with great success, so I will do it today when the boys go down for their nap!!!

Will

[sblake01]

For cleaning the injectors:

I have been meaning to write up a technical article for the simple and cheap procedure I have used for years with great success, so I will do it today when the boys go down for their nap!!!

Will

Pressurized cannister connected to the fuel rail with the return blocked off? That's how I used to do my Z and 810.

http://www.classiczcars.com/forums/showpost.php?p=256648&postcount=16

Edited July 9, 2009 by sblake01

[v8eter]

Its a little crude but it has worked several times for me. If your looking to clean the injectors, the above works, if your looking to unclog them take a LONG screw driver (flat head or phillips) and put them right were the injector goes into the manifold, and hit the end of the screw driver with a hammer, lots of times it will knock things loose.

[sblake01]

A 'little' crude? My method also unclogs them.

Edited July 13, 2009 by sblake01

[anthony280z2+2]

Will this damage the injectors

[sblake01]

Will this damage the injectors

If you're talking about v8eter's method, I wouldn't recomment it. Does that even sound like something you'd want to do to your car?

[anthony280z2+2]

Not really but I never cleaned or work with the injectors. I'm at a blank and fir the first time might even call a mechanic

[sblake01]

If the car is running, they can be cleaned quite effectively on the car with what I mentioned in post #3. However, I doubt if dirty injectors is your problem. Somewhat unlikely that they all would become dirty enough so that none of them would inject. Do you know if you have a signal going to them?

[anthony280z2+2]

Just bought the tester and will get back to you on that. If there's no signal it could be my ECU right. But if there is then what?

[sblake01]

No signal could also be a relay. If there is a signal and you've got fuel pressure it should run. Let us know what you find when you test it.

[MEZZZ]

I went through this with my car and Stephen was spot on. I went to the local auto parts store and bought a noid light to test the signal to the injectors, very simple to use. Once I verified I had a signal at each connector, I checked the fuel pressure after the fuel filter before it went into the fuel rail. I beleive (Stephen correct me if I am wrong) 36.1 psi or somewhere close to that.

If you have pressure and a signal, it should start. It is possible that its the fuel relay as well. I am leaning that the fuel filter might be gunked up if it sat for awhile.

Let us know your results