Quote from Pettern on September 17, 2018, 3:32 pm

I got a 1200 unit on a Ford 408cu W. It runs great, but for some reason it wont start if the car have been sitting for more than a day.

If I use the car regulary it starts and idles right away, but if I dont disconect the battery and let it stay 1-2 days it fires up from the prime shot and die, I can do this for as many times I want, no difference, Fires and dies.  Lot off battery power, starter crank well.

Tryed 2 new batterys, same problem. all power and ground to battery. tryed 2 fuel pumps, same. If I addd a start booster and get the voltage above 13 volt it fires and runs. After that I stop and start as often I want to during the day.    Anybody experiensed this problem.?