1986 Chevy S-10 Hard to crank and will not stay running

Engine Mechanical problem
1986 Chevy S-10 6 cyl Wheel Drive Type unknown Automatic 156320 miles
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Hi, my vehicle is difficult to crank or turn over, once it starts, it dies. When I'm able to keep it running, it cut off when I put it in gear. By the way, it's fuel injection. A friend told me that it needs a "fuel injection tune-up".

Thanks,
Lamar