Engine Performance problem
1999 Chevy Tahoe V8 Four Wheel Drive Automatic 162500 miles
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My 1999 Tahoe with 162500 miles on it will fire but will not start, i have changed the fuel filter and it fixed it for 2 days, then i changed the fuel pump and that fixed it for 5 days, now it is doing it again, the only thing i can think of is the fuel injectors and regulator, i have been told that there is an upgrage to a mpi system, what do you think about that and what other parts will i need, thank you very much.

blue2door wrote:

Engine Performance problem 1999 Chevy Tahoe V8 Four Wheel Drive Automatic 162500 miles ---------------------------------------------------------------- My 1999 Tahoe with 162500 miles on it will fire but will not start, i have changed the fuel filter and it fixed it for 2 days, then i changed the fuel pump and that fixed it for 5 days, now it is doing it again, the only thing i can think of is the fuel injectors and regulator, i have been told that there is an upgrade to a mpi system, what do you think about that and what other parts will i need, thank you very much.

yes there is an update to the injectors, harness and controller, you may have to fabricate brackets

comes in a kit

Why does the vehicle start after letting it sit for a half a day or so.

blue2door wrote:

Why does the vehicle start after letting it sit for a half a day or so.

when it doesnt start try spraying some carb cleaner down the throttle plates and see if it starts then you know its fuel related

I also replaced the injector assembly and the ignition switch, it is still starting then dying, any ideas. Could it be because of a worn down key??

blue2door wrote:

I also replaced the injector assembly and the ignition switch, it is still starting then dying, any ideas. Could it be because of a worn down key??

go to autozone and have your codes read, may tell us something, history and current ones

There are no codes present in the computer, it will start in the evening and not in the morning, when you turn the key to the on position in the morning the security light stays lit and does not go off, in the evening it goes off after 5 seconds or so and the vehicle starts and runs. Any ideas??