L-jetronic Troubleshooting, Runs Rough and Runs Rich Options

[BENBRO02]

It starts okay when cold and only has a slight miss but as it warms up it starts to miss more frequently, bucks, and if hot and idling may cut off completely. If I'm on the highway it may lose 20 mph before it starts running well enough to maintain speed or accelerate. I have recently had the following replaced:

fuel tank
fuel pump
fuel lines and hoses
fuel sending unit
vacuum hoses
large and small injector seals

The shop also checked the vacuum advance and cleaned the injectors.

I emptied my bank account with the repairs so now it's time for me to find the problem. Any Ideas? The car has a Pertronics ignition.

[jim_hoyland]

I would check the FI harness and a couple of the connections 1st;
1. Is the connector going to the left side of the dual relay firmly attached ? I used to have the FPump wire back off it’s spade and cause havoc.
2. Are the wires in the resistor pack all connected, look for a loose soldered wire barely making contact
3 does your FI have electrical tape repairs ? Could be a sign someone resolved a wire or two and it’s coming loose
BTW: I have a L-Jet FI Barnes listed in the classifieds

Good luck on this

[BENBRO02]

I would check the FI harness and a couple of the connections 1st;
1. Is the connector going to the left side of the dual relay firmly attached ? I used to have the FPump wire back off it’s spade and cause havoc.
2. Are the wires in the resistor pack all connected, look for a loose soldered wire barely making contact
3 does your FI have electrical tape repairs ? Could be a sign someone resolved a wire or two and it’s coming loose
BTW: I have a L-Jet FI Barnes listed in the classifieds

Good luck on this

Thanks for the advice. I'll try those and see what happens. I'm not sure I understand exactly what your saying though. I'm technically challenged and just learning where stuff is. Is it possible some thing is plugged in wrong? I did go check out your wiring harness and thought to myself that is was expensive until I saw a new one from Bowlsby is $752 plus a core charge. Now your used one in good condition seems inexpensive.