L-Jet: Over My Head, Bad ECU, car's back on the road. Options

[Mike Sanford]

I'm a little above my skill set playing with this stuff.

Took the wife out yardsale-ing Saturday morning. This is Tucson, maybe 85 degrees at 8am. Drove two blocks from home, stopped at one. Drove another 5 blocks, car acted as if it ran out of gas. Gas tank is full. Key on, pulled fuel line off of rail and opened air flow meter, squirts fuel. Pulled injector out of a cylinder, moved air flow meter, no fuel.

Shoved my analog voltmeter into injector plug, no sign of a signal at the injector.

Played on the internet looking up l-jet trouble shooting, decided to start with checking the relay because it seemed less intimidating. From what I'm seeing there should be voltage between 88a, 88b, 88c, and 88z and 85 (the ground). I have voltage everywhere except 88c. Come back inside, back on the internet, 88c looks like it powers the auxilary air valve. Would this cause the whole system to shut down? Is there something else I should be checking?

Thanks,
Mike

[timothy_nd28]

K, verify you still have spark. Next pull off the ECU connector. With the key set to the "on" position, check pin 10 with the positive meter lead and put the negative meter lead on pin 5. What is the voltage? Do the test again, but now measure pin 10 to pin 16. Finally, check pin 10 to pin 17

If you have a strong 12 volts on all the above, set your meter to measure resistance. Measure the resistance between pin 1 on the ECU plug to the negative side of the ignition coil

[Mike Sanford]

This is the part that intimidated me, and why I started with the relay.

Have spark.

Pulled connector off or ECU.

How are the pins numbered?

[Mike Sanford]

Found a diagram online. Checking now.

[Mike Sanford]

Good voltage across all the pins you listed. This is first time I've used the resistance function on the meter, looked like 5K ohms if I'm reading it right.