First thing check the sensors for 5 volts reference from ecm if they have ecm is good...most times ecm will give a code for failed diagnostics,,if bad.
Seems it is fuel related though. You timed with timing wire disconnected? Need to also check the 02 sensor if not working will have your issues ..i have to get to work ..will give more info if you need..should be able to search on the voltages here .
Trouble Code 13 indicates that the exhaust stream oxygen-content sensor (O2 sensor) is not responding as expected. When cold, the sensor is 'biased' by the ECM to about 450 millivolts. Before it warms to at least 600 deg F (315 deg C) it acts as an open circuit and when the ECM reads it, it reads the 450 mV bias. The ECM expects the sensor to warm in a short period of time and begin sending its own voltages. The general conditions for this code getting set are:
? engine running at least 2 minutes
? coolant temperature at least 50 deg C (122 deg F)
? O2 voltage not fluctuating (i.e steady between 350 and 550 mV)
? TPS signal above idle
? all above conditions met for 60 seconds
Typical causes may include:
1. Defective or degraded O2 sensor
2. Deposit-contaminated O2 sensor (running leaded fuel, RTV silicone deposits etc)
3. Corroded/defective O2 sensor connection
4. Defective sensor ground circuit