2003 Chevy Astro Need help starting car

The coolant temp sensor could cause a problem so could the tps. Any applicable trouble codes? Some of the name brand autostores used to check codes for free. Use a gage and check fuel pressure, see if pressure bleeds off too fast? When the problem is ongoing, have a helper crank it while you visually check for spark at the plugs. Do you have the spider fuel system?

we did put on the machine. the codes were:
po100,po102, po103, and po104.
i have a book on what the codes mean and all of them were in there besides po104.
I do not know what a spider fuel system is,
i have a csfi(central sequential fuel injection) system:if that helps with anything.

I see, everything points to the maf sensor. At the maf connector, the pink wire is voltage, key on, no crank, use a digital multimeter, check voltage. Black wire is ground. Yellow wire is signal. You may need a scanner that shows live engine data, to look at the signal?

we did that. Nothing has changed. It is still doing the same thing. What should I do now?

Don't know, I would have to look at it.