Hi I’m a new member on the forum. I’ve had a 1980 fiat 124 spider for about 30years. It’s the car I plan to drivecross country in when I retire, but I’ve not yet retired. Its mostly been in storage in the last 30years and may have been driven a thousand miles. It ran well about two years ago but now willnot run continually. I’ve had experiencewith the injectors as I’ve owned VWs with L-Jetronic system before.
The engine will run forever at fast idle if the 5thinjector is connected to positive power.
The engine will also run on four or maybe less of the maininjectors if everything is hooked up (with or without the fifth injectorconnected as normal) and if the main injector ground wire is removed from thecomputer and ground out the four injectors going tick tick tick tick to theground. This completes the groundfunction of the computer and the car will run until you get tired of doing this.
I’ve opened up and cleaned off anything I could find in theECM, but I haven’t really done much more than this. I’m guessing the “relay” or whatever iswithin the computer that produces the intermitted grounding is notworking. I would appreciate any input soI can move onto the next step with blowing up the computer.