no power to injectors

5

Asked by carguy91 Oct 19, 2010 at 04:11 PM about the 1991 Chevrolet S-10

Question type: Maintenance & Repair

91 4.3 s10 motor with a 92 4.3 s10 ecm have no power to injectors and we have already benched tested distributor components

8 Answers

450

try the oil pressure swich,it's located at just above the oil filter. engine must have at least 4-6 psi of oil pressure while starting or it will not start. you can by-pass it by just connecting the 2 wires that come to the sender. my .02$

15 people found this helpful.
45

one word did the same thing with an 88 s10 blazer ""coil"" the power comes from it

4 people found this helpful.
70

you need to run a test on it but it could be your electic spark contor module

1 people found this helpful.
30

I did that change control module electronic ignitions new distributor cap and rotor fuel pump fuel filter o2 sensors new battery still not working

3 people found this helpful.
130

I got the same problem I change the fuel pump fuel filter relay fuses control modular I even replace the fuel injectors I replace the engine computer too my fuel pump will Prime the fuel injectors are not getting any electricity

13 people found this helpful.
70

Same problem, I've replaced plugs, wires, cap, rotor, fuel pump and still cannot get truck to fire, however with starter fluid spray she fires right up. I finally determined no power at the injectors, so I jumped 12 volts to the splice of the injectors power circuit at the section of harness coming out the front of the throttle body, my truck runs! But with a high idle, I assume these injectors do not need or want a constant 12 volts but she is running now. I am unsure why these injectors are not recieving power, fuse is good (ecmb fuse) is it a fault in ecm? Or is the ECM not commanding them on due to another failure?

7 people found this helpful.

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