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TBI Oil Pressure Sensor Question

Discussion in 'The Garage' started by jimmy'sjimmy, Jan 25, 2007.

  1. jimmy'sjimmy

    jimmy'sjimmy 1/2 ton status

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    I have an 87 TBI 350, just put in a rebuilt motor and got it fired up. Only problem is i dont have the oil pressure sensor hooked up. Connections were different when i went to hook it up. The question i have is will the computer shut down the fuel pump if there is no oil pressure? It runs perfect when we poor a little gas in by hand but the injectors never fire. I wasn't sure if it was the oil pressure thing or the alarm i have installed. Anyone know if no oil pressure means no fuel?
     
  2. HarryH3

    HarryH3 1 ton status Author

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    If your fuel pump relay is good, then the fuel pump should be running. The ECM does however care whether or not it is seeing reference pulses from the distributor. No pulses from the ignition = no injector pulses. :( It will also switch off the fuel pump relay if it doesn't see pulses for 2 seconds.
     
  3. Col_Sanders

    Col_Sanders 3/4 ton status

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    I think it should have the same connector but if not you can get a new sensor at NAPA or whatever. Its easy to put on and I think it cost around $30. An oil pressure guage is a good thing, especially on a new engine.

    As far as no fuel, when you turn the key to on you should be able to hear the fuel pump. If you can hear it and still get no fuel a possibility is you forgot to put the connector from the coil to the ignition module, that will cause you to get no fuel.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    So you know you've got spark, you just aren't getting fuel to the cylinders. Narrows it down a bunch. :)
     

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