What does the map sensor do

SOURCE: 1998 chevy suburban map sensor

Hi, The Map sensor on a Suburban is located.
Beside of the ignition coil. on the intake.
Is a litle sensor with a connector of 3 wires.

I hope this work for you. OK

SOURCE: The truck won't start, Fuel

Fuel pump replaced, crank sensor replaced, coil, wires and plugs all replaced, now truck acts like it's flooding out and won't continue to run.. problem started with truck shutting itself off while driving. you could let it sit and cool off and it would restart but only for a few minutes..

SOURCE: truck starts, dies. truck runs good some days,bad the next

I had the same problem with My 1990 F150 300 6cylinder 4x4.....I cahnged all the same things you did, finally I sprayed a can of Gumout through the throttle body and it worked and ran great. Now I add fuel injector cleaner to the gas and a regular clean with the gumout and the problem has'nt come back. Good Luck to you and hope it works!

SOURCE: Fuel pump and electrical

its very likley that your fuse is blown. If you look it should be something like injectors a+b

SOURCE: 1987 chevy s10 2.5l tbi will not start. changed

That eliminates the crankshaft and camshaft position sensors. Have you checked the fuel injector itself for an open winding or stuck valve plunger? There should not be a steady 12 volts to the injector--if good injector, it would be spraying fuel steadily into the throttle body. But at least the engine should try to run if poorly. Take the injector out, dry it off with air, and intermittently apply 12 volts to one terminal while grounding the other. You should hear a click from inside every time you touch 12 volts. If not, replace it. If it does, it may be plugged with debris. Try blowing through it in reverse with compressed air.