Tbi swap build thread

[cheepin]

Originally Posted by rfmaster

You need to verify POST functionality - ignition key from off into run position, but do not attempt to crank engine over. You should see SES light go from solid on blink off back to on. Meanwhile fuel pump must come on for about 2 seconds and shut off. If the pump does not come during this check the likely culprit is a bad fuel pump relay, wiring between ECM (Pin A1 dark green/white) and Fuel pump relay coil circuit, or possibly blown driver transistor that provides + 12V to energize FP coil. The black/white wire in the FP relay socket must be grounded. Otherwise coil will never be energized.

When you pour a little bit of gas into TB engine fires and oil pressure switch NO contacts close once oil pressure is in excess of 6 PSI thus providing power to the fuel pump.

Check and see if there +12 volts supplied by ECM to FP relay coil circuit when engine is running (the aforementioned A1 dark green-wht wire) .

//RF

I have the Fuel pump on a switched relay not the factory one.I do have the factory one under the hood.And hook up to the comp.