L-Jet Injectors Aren't Getting Ground, L-Jet Injectors Options

[nmkimosabe]

After a thorough investigation, it appears that the injectors are not getting ground to fire properly on my 1974 1.8L. Maybe it's an air flow sensor issue but not sure. All the other wiring seems to be okay. I would appreciate any thoughts from the knowledgeable folks on this forum. Thank you.

[JeffBowlsby]

Check the schematic for these circuits. LJet injectors do not ground directly, they go through the resistor pack (look for broken wires) and then to the double relay.

[fiacra]

Jeff is the expert here so I'd start with what he recommended. Along those lines, have you tried swapping out the dual relay? I think you said you had the original metal can relay in your car. I'm happy to lend you a NIB dual relay for a test if you wish. You should have a back up relay anyway so you are not wasting money by ordering a new one. However for testing purposes I can get you one quicker than you'll be able to get from JBugs or any other supplier. Happy to put it in today's mail if you get back to me quickly.

[nmkimosabe]

Jeff is the expert here so I'd start with what he recommended. Along those lines, have you tried swapping out the dual relay? I think you said you had the original metal can relay in your car. I'm happy to lend you a NIB dual relay for a test if you wish. You should have a back up relay anyway so you are not wasting money by ordering a new one. However for testing purposes I can get you one quicker than you'll be able to get from JBugs or any other supplier. Happy to put it in today's mail if you get back to me quickly.

I took your advice earlier this week and bought one per the SKU's and photos you posted. I won't get it until Wednesday, but my mechanic thinks mine if okay. I am also buying another resister pack in case mine is bad. I really appreciate your offer to send me a loaner! I will keep you posted as we solve this issue. Best to you.

[nmkimosabe]

Check the schematic for these circuits. LJet injectors do not ground directly, they go through the resistor pack (look for broken wires) and then to the double relay.

@JeffBowlsby
Thanks Jeff for taking the time to send the schematic and your thoughts. I've read many of your articles since I bought this car last Spring. I will print this out and review with my mechanic on Monday and get back to you. We've checked all the wiring, AFM plug and flap, vacuum lines, dual relay, dwell, coil but can't seem to get the injectors to ground and per your article they don't. It has normal fuel pressure and will start briefly at times but won't continue running. I will order a new resistor pack as mine might be the problem. Thanks Jeff.