I need help. Changed oil Presure sensor Now Injectors wont fire.

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Oct 27, 2013 | 04:34 PM

Blackbird down2

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Car: 91 Formula

Engine: 305 TBI

I need help. Changed oil Presure sensor Now Injectors wont fire.

I noticed oil drizzling out of my oil pressure switch, replaced it. Immediatly after, injectors on TBI stopped working. Installed new fuel pump. Fuel pumping, but no fuel comming out of injectors. Saw that Oil pressure switch has low pressure cut out to injectors in a schematic. Oil pressure sensor seems to work, as pressure on guage increases as engine cranks. What is going on? What is the next step? How do I fix this? One of you wizards must know.

Oct 27, 2013 | 06:06 PM

vetteoz

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Re: I need help. Changed oil Presure sensor Now Injectors wont fire.

Quote:

Originally Posted by Blackbird down2

no fuel comming out of injectors.
Saw that Oil pressure switch has low pressure cut out to injectors in a schematic.
What is going on? What is the next step? How do I fix this?

Did you disturb any wiring while replacing the switch?.
If the ECM doesn't see the signal from the dist it won't fire the injectors

The OP switch is a back up to the fuel pump relay, it lets you start your engine if the pump relay fails. It does not cut off the fuel.

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