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When it shuts off it is time to check things out. Check fuel pressure on the fuel rail and check for spark at the plugs. If no spark the coils may be bad. As the engine heats up the inside of the coil pack may be seperating or grounding themself out. If fuel pressure is low the fuel pump may be weak and on its way out. This happens to people that run there car untill the fuel light comes on.it is ******* the fuel pump because the fuel it's pumping is what cools it. You can search on google or youtube for what your particular cars fuel pressure should be.
most commonly found problem relates to an electronic component heating up and shutting down. Have you checked to confirm there is fuel pressure when the vehicle shuts off. Is the check engine light on. Have you checked codes ? I suggest hooking up a fuel pressure gauge and letting vehicle run till it shuts off while monitoring the fuel pressure. If you loose fuel pressure, next step is to confirm there power going to the pump, if there is power going to the pump with no fuel pressure replace pump. Another suggestion would be to check for spark when vehicle stops running to eliminate an ignition problem. good luck
First off, your Z28 does not have a carburetor. They haven't put carburetors on Camaros since 1984. Your Camaro is fuel injected and has a throttle body. You are having a fuel issue. You fuel pump is probably bad and or fuel filter is clogged. I am assuming you are not a mechanic so I would recommend taking this to your local repair shop to be fixed. They will have to drop the tank to get to the pump. You should also have your injuectors cleaned while you are at it.
Try changing the fuel filter before you do anything drastic. The fact that your car starts better when the tankis full leads me to believe the tube in the gas tank has a hole in it or has come apart somewhat. It could be sucking air.
It's not terribly difficult to change the fuel pump. It's mostly dirty and difficult, because you have to remove the gas tank. And those silly little pumps are pricey. The easiest cheapest fix is to go to an auto wrecker and get the whole gas tank, with the pump still in it. Don't be afraid of used parts. You drive to the parts store on them all the time.
The 3 psi is caused by a failed transfer pump. The problem the loss of could be the VP44 injection pump. This pump should be run at min 7psi. I had the same fuel pressure problem. I replaced my stock transfer pump with a FASS DDRP from www.usdieselparts.com. The stock pump is over $200 to replace and will fail again, sometimes right out of the box. The DDRP will supply about 15psi to the pump and is simple to install. I hope this helps.
The thing you need to do is run a leak down test on the fuel pump overnight, hook up a fuel pump test guage to the fuel injector gas rail test port, run the engine, note the fuel pressure when you shut the engine off, it should not drop more than 5 PSI overnight, if it does you need a new fuel pump. Your car doesn't use a cold start valve, that was used on very early Bosch K-Jetronic fuel injection systems, they where last used in the 80's
I had this problem for years when my 87 was only a few years old. Even though it was tested over and over, the distributor ended up being the problem. I got lucky when a friend saw it posted in a tom and ray column in their local newspaper. It was for a corolla, but same year. I told my mechanic to replace it. He said I didn't need one, I insisted he replace it anyway and I've NEVER had the problem again. Hope it fixes yours.