1992 Chevy G20 Van Dies

Question edited for clarity.
Question moved to model category.

Newbie!! G20 radiator replacement - Chevy Message Forum

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Mar 10, 2015 - Resist the temptation to add anything to the radiator. Working on a van is challenging enough without having nuisances like this. Be patient as ...

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When does the battery die , over night , while driving the van ? Is the battery light lit on the dash when the van is running ? I'm just trying to find out when it dies . You could have one of two different problems , a charging problem ,which would more then likely be an alternator problem or if it dies overnight you would have a parasitic draw on the system draining the battery .!

check egr valve for carbon and proper function --also check cat converter possible clogging

Have you checked your radiator cap maybe its not building pressure.

Check on frame rail on drivers side, near front of gas tank.

the van has no choke its fuel injected, it will need scanned to diagnose the faulty sensor or vacuum leak

24-26 ftlbs

intake vacuum leaks or bad wires and plugs.

It sounds like it may be a problem with the PATS (Passive Anti Theft System). Chevy has been having problems with PATS since 1992 til current. Even if your key doesn't have a visible "chip" in it, it is possible that you have the PATS system. The newer PATS systems work by recognizing the exact cut of the key. In some cases extremely worn out keys have been known to stop working correctly with your ignition. In worst case scenarios the ignition cylinder itself, which contains the other chip for PATS, wears out so badly that, one time in ten or more your vehicle doesn't recognize the key and fails to start. The logic is this: If a thief tries to jimmy the ignition, the PATS system shuts down the ignition system for 20 minutes (30 on some vehicles). This is supposed to discourage the thief from trying again, while still letting you start your vehicle. There are procedures for bypassing the PATS system on many vehicles, but it is not for the faint of heart. The wiring work itself isn't bad, but there are catches: 1) you must have the vehicle running while you make the modification in most cases, and not shut it off during the bypass. 2) It's recommended you install a switch in the bypassed wire so you can disable your bypass in case your vehicle needs service. 3) if the vehicle dies during the bypass for some reason, you may have to visit the dealership and get a new ignition cylinder, and a quick reprogram of the PCM or ECU to get it going again. (Pricey)

sounds to me like the fuel pump is bad, when it warms up it dies, try to check this by filling the tank and running a while, then run the van with a near empty tank and see how it does. A full tank of gas should keep the fuel pump cool as it is surrounded by the liquid. I had a similar problem. when my tank got to about a quarter full (3/4 empty) the van would shut off after a short distance, then after sitting for a while would start up again get me a little farther then shut off again. i ended up changiung the fuel pump cost me almost $300. if this simple test shows no results the you got electrical problems, check distributor, and surrounding cables. good luck. also check your fuses could be dirty!