Fuel pressure and spark but won't run Options

[Groosh]

Hi. I recently bought a '74 1.8 and am looking for help to get it running. It has the original fuel injection and ran late last year according the previous owner.

Here's what I know after reading many posts in the forum and working on it. Thanks to everybody who contributes, I couldn't have gotten this far without your help.

- The dual relay is bad I believe. After wiring it all back up, there is power from the ignition to both the start wire and run wire but no power to the fuel pump. I'm jumping the pump currently to test
- All relays in the board work
- Fuel pressure gauge shows 35psi on startup. I didn't install this gauge but seems to work ok
- Will fire with starting fluid

I'm thinking I must be pretty close and suspect the car isn't getting fuel but the gauge shows pressure?

[timothy_nd28]

Old meters like that are awesome! Go ahead and reinstall the resistor pack, then try re-seating each fuel injector connector. So, remove the 2 pin electrical connector from a fuel injector, then push it back on. Do this 13 times for each fuel injectors' connector. After all this is done, and assuming that jumper is still on pin 85 of the dual relay and the ignition key is on,,put one meter lead on the negative battery post. With the other meter lead, probe pins 14,15,32,33 to see if they have 12volts, more importantly does pin 14 and 33 now have voltage after reseating the fuel injector connectors?

If the above instructions fail to remedy pins 14 and 33 then lets continue.

We need to know what injectors correlate to pins 14 and 33. To find this out, we can use the injectors that do work, pins 15 and 32. Put your meter lead on pin 15 and with the same test conditions as the paragraph above, you should get 12volts. Start by unplugging one fuel injector at a time while watching your meter. If the 12volts drops out when unplugging, then that injector matches up with pin 15. If 12volts is still present after unplugging one fuel injector, simply plug that connector back in and move onto the next fuel injector connector. Rinse and repeat till you find that one injector that makes pin 15 go dead. Repeat the same test but put the meter lead in pin 32, find that other good injector.

Once you find the two good injectors, we now know the two problem injectors.

With the offending fuel injectors, go ahead and remove the connectors for those two. It will be hard to probe these pins with your meter, you may need to fashion a paperclip at the end of your meter lead.

Ok, with the ignition switch set to on and your jumper still on the dual relay, put one meter lead on the negative battery post. We are measuring for 12volts. Probe both pins of each injector harness connector. Of the two pins, only one will show 12volts while the other pin will read nothing, do this for both bad injectors.

[Groosh]

Old meters like that are awesome! Go ahead and reinstall the resistor pack, then try re-seating each fuel injector connector. So, remove the 2 pin electrical connector from a fuel injector, then push it back on. Do this 13 times for each fuel injectors' connector. After all this is done, and assuming that jumper is still on pin 85 of the dual relay and the ignition key is on,,put one meter lead on the negative battery post. With the other meter lead, probe pins 14,15,32,33 to see if they have 12volts, more importantly does pin 14 and 33 now have voltage after reseating the fuel injector connectors?

If the above instructions fail to remedy pins 14 and 33 then lets continue.

We need to know what injectors correlate to pins 14 and 33. To find this out, we can use the injectors that do work, pins 15 and 32. Put your meter lead on pin 15 and with the same test conditions as the paragraph above, you should get 12volts. Start by unplugging one fuel injector at a time while watching your meter. If the 12volts drops out when unplugging, then that injector matches up with pin 15. If 12volts is still present after unplugging one fuel injector, simply plug that connector back in and move onto the next fuel injector connector. Rinse and repeat till you find that one injector that makes pin 15 go dead. Repeat the same test but put the meter lead in pin 32, find that other good injector.

Once you find the two good injectors, we now know the two problem injectors.

With the offending fuel injectors, go ahead and remove the connectors for those two. It will be hard to probe these pins with your meter, you may need to fashion a paperclip at the end of your meter lead.

Ok, with the ignition switch set to on and your jumper still on the dual relay, put one meter lead on the negative battery post. We are measuring for 12volts. Probe both pins of each injector harness connector. Of the two pins, only one will show 12volts while the other pin will read nothing, do this for both bad injectors.

Well go figure. After the car sat for almost a week things tested out differently. I did the pull reset 13x on the fuel injectors:

- 32 is cylinder 2 and gets volts at the 32 pin
- 33 is cylinder 3 and gets volts at the 33 pin
- 14 no volts at pin - injector harness gets 12 volts
- 15 no volts at pin - injector harness gets 12 volts