Twister69

i have a 96 wrx with magnex, de-cat and a fifth injector (possible engine change at some point). in the last couple of weeks, maybe once or twice a week it cuts out when im driving, generally at slow speeds.
After it cuts out only the battery light and the oil light up on the dash. its not until all four (i.e the cel light and the other one) light up that the car starts again.

Any ideas? other than that the car runs fine and the cel never comes on when driving. my last car used to cut out a bit like this and it turned out ot be the factory immobilizer. this one has a toad cat1, tracker and turbo timer, but if the alarms on the four lights still light up on the dash.

anyone know what this could be?