94 z 28 no start with gas gauge pegged full
05-29-2015, 03:52 PM
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Re: 94 z 28 no start with gas gauge pegged full
Do you hear the fuel pump prime when you turn the key to "run"? Should run for 2 seconds, then turn off. The cause of the fuel gauge being plugged could be an open circuti (high resistance = high level indication). Since both the gauge level sensor wire and the fuel pump wires are in the same connector over the axle, I would check there:
Courtesy of Shoebox
Test Fuel Gauge/Level Sensor
If you have continuity on the fuel gauge circuit, and the pump is priming, check, the fuel pressure at the Schrader valve:
Courtesy of Shoebox
http://shbox.com/1/fp_reg.jpg
Should prime to at least 40psi, and not drop off rapidly.
With fuel verified, check for spark at several spark plugs, and at the coil wire.
Scan the PCM for codes.
Courtesy of Shoebox
Test Fuel Gauge/Level Sensor
If you have continuity on the fuel gauge circuit, and the pump is priming, check, the fuel pressure at the Schrader valve:
Courtesy of Shoebox
http://shbox.com/1/fp_reg.jpg
Should prime to at least 40psi, and not drop off rapidly.
With fuel verified, check for spark at several spark plugs, and at the coil wire.
Scan the PCM for codes.
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