Engine cuts out, FI problem??? Options

[EJP914]

Hello,
I have a '73 1.7 car with fuel injection. Just starting to get it back on the road after sitting for many years. The car starts easily, idles well, and seems to run ok when warming up. Once warmed up and on the road, intermittently the car will stumble like shut off and then just as quickly it will go again. Going around corners, not all corners, it will do the same but for longer periods of time. Pushing on the gas when this occurs, nothing happens. The engine doesn't rev. its like its disconnected.

I recently changed the fuel lines at the fuel pump due to age and cleaned out the fuel injectors. Car has about 5 gal of gas in it.

Any ideas on where or what to look at first? Does this sound like a FI related problem? Thanks for the advice.

EJP914

[Spoke]

To debug this issue, I'd start with a full tank of gas just to take the fuel supply out of the equation. When I first got my 914, I let the fuel get low and the car started dying as I drove. Stop, restart ok, drove ok for about a mile then died. Took off the fuel sender, looked inside and saw the bottom of the tank full of rusty crunchies. Cleaned and coated the tank and haven't had an issue since then. However on both my 914 and 930, I never let the fuel supply get below 1/2 tank.