Any help would be appreciated. I have a 97 Supra on stock twins, Haltech sport 2000, AEM fail safe wideband which have been installed for several years and worked fine. Recently, the engine will dies shorlty after getting to operating temperature at idle or while driving. If I turn the key after engine dies, the engine will crank but not start. If I turn the key all the way off then the engine will restart for a few minutes before dying again. If I let the engine cool down, the engine will start and run for a while again. Because of this issue, I just installed a new Denso fuel pump and both fuel relays but still having the same issue. Any ideas? Thanks in advance.