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1990 Chevrolet G Series Van (G20) Questions

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Upon driving it backfires and sometimes stalls. Already changed plugs, spark plug wires, rotary cap, distributor cap, coil pack. Also, add fuel system cleaned and new air cleaner.
When this first happened the Service light came on and before I could drive home the van died. Would not start because of flooding from carb. Towed home, replaced oxygen sensor and ran fine. Drove another 11 miles and it did it again. What other sensors would cause this?
Filler tube is loose and leaking a small amount of oil.
My Chevy g20 has engine failure. Engine is almost out but it's not fitting through dog house, new engine is in crate ready to be installed next to engine. transmission is leaking and may need replacement. Needs all new wiring in engine area, Needs entire front end dissembled to replace engine. My mechanic thinks it's too much work and not worth fixing. Already paid him 750$, it's not even out yet. What should I do? is it worth fixing or should I just sell it for scrap? Paid 2000$ to owner who claimed it was fine to drive. Paid another 2000$ for engine, can probably get most back on that...If I put another 1500-2000 into it I can get everything but the trans replaced...
instructions say that it is necessary to install a set screw in the sector gear before disassembling it from the regulator is this really necessary
This just started happening after I got an oil and coolant change. Had previously changed the starter recently.
Checked fuse under steering is fine. Bulbs are not burnt out. they just stopped working one evening.
Problem continues,have to puul fuse
It will not start back up until it sets for a while
I replaced the ignition modulator, rotor and cap
Hi
I have a 1989 Chevy G20 conversion van with a 5.0L engine, a TH400 transmission, and a nasty metallic noise in the back. The mechanic says it's the differential and it's time to start shopping for a new/used one. Is a full replacement really necessary when the van only has 54,000 miles or could it be repaired? And for replacement-shopping purposes, how can I identify the old differential? Does it have a plate somewhere on it or an options code or something? Thanks for any help you can give me.
Goes into gear it drives and changes out great what could be my problem I've already changed the strainer and module valve
All was well yesterday, backed it out of driveway and parked it on road and went to start it this morning and thought the battery was dead. Then I noticed all the lights were bright, hooked up jumper cables for 20 min still nothing. It's not even trying to crank HELP PLEASE
I just bought this 1989 G20 van (with no owner's manual) so hopefully I'm missing something really stupid and easy. Battery is new and fuel pump runs when key is turned to accessory, but when turned to start position absolutely nothing happens--not even a click from the starter, much less cranking. But the "Brake" light on the dashboard comes on and then turns off again as soon as the key is released. OBD gives me the code 12, shows no errors. Has anyone more familiar with these vans ever seen this? ECM maybe?
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