Need a diagram of allthe sesors on a 1990 S15 jimmy TBI 4.3Wseries

You would be better off going to a auto salvage yard an getting a whole wring harness out of S-10 that had a V-6 with TBI ! Go on the internet , some salvage places have a hot line so to speak an can find one . 4 3L V6 Intermediate Wiring Harness EFI TBI Chevy S10 GMC S15 Blazer Jimmy... This just an example !

Looking down at the tbi there are 2 screws holding the injectors in place, remove them then remove injector ,a oring goes around each injector

YOU CAN PULL EVERY FUES WITH NEEDLE NOSE PLIERS WONT TAKE BUT 5MINS OR SO YOU MIGHT FIND OTHER ONES BLOWN..SOMETIMES IF ALL FUES ARE GOOD THE LIGHTER SOCKET GOES BAD OR THE LIGHTER GOES BAD

behind glove box compartment.

Here is the firing order for that vehicle and engine, however, some people can not figure it out (color coding and numbers seem to be too complicated for some) and have given low ratings for this diagram, and I will probably stop giving out this firing order. Let me know if you need help to understand this diagram, or require any further assistance.

GMC S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual
VACUUM DIAGRAMS (See Figures 1 through 85)

Below is a listing of vacuum diagrams for most of the engine and emissions package combinations covered by this manual. Because vacuum circuits will vary based on various engine and vehicle options, always refer first to the vehicle emission control information label, if present. Should the label be missing, or should vehicle be equipped with a different engine from the car's original equipment, refer to the diagrams below for the same or similar configuration.
Check the link autozone.com (free register), select the year ('91 sample), Brand, Model, Sub-Model, Engine Size and make the next root...
1991 GMC TRUCK S15 4WD 4.3L TBI 6CYL REPAIR GUIDE >> EMISSION CONTROLS >> VACUUM DIAGRAMS

I really hope helps with this (remember rated this help). Good luck.

For this models:
1986 GMC S15/T15 4WD P/U 2.8 liter V-6 VIN "R"
1986 GMC S15/T15 4WD Jimmy 2.8 liter V-6 VIN "R"
1986 GMC S15/T15 2WD P/U 2.8 liter V-6 VIN "R"
1986 GMC S15/T15 2WD Jimmy 2.8 liter V-6 VIN "R"



Hope helped woth this. Remember rated this help. Good luck.

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Relay - Fuel Pump 1991 GMC Truck S15 Jimmy 2WD 4.3L TBI 6cyl The Relay - Fuel Pump Under hood, driver side, upper firewall, mounted in relay block

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Might just be the timing is off a bit, turn your distributor or if it has a carburator, the choke might need to be turned up.