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I've done the fuel treatment a few times. I thought this was the fix, but the starting issue came back. It starts fine if it has been sitting for a while (such as overnight, or for 8 hours), but when restarting after a few minutes or a couple hours, it cranks longer. I've been pressing the gas pedal a little to help it get started (in case that helps - doesn't seem to hurt). Maybe it is the cold start injector. A mechanic said, "we found that the cold start injector in the intake manifold is leaking, and the fuel pressure drops while the vehicle is sitting. We would recommend replacing the cold start injector before performing any additional driveability testing."
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