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first off i have a 02 civic ex boosted with a greddy e-manage bigger injecters,modified fuel rail,missing link,my problem is i just got it back from the shop last sat and ran great boosting around 5psi good power no check engine light and the last 3 days my check engine light comes on and when i hit close to 4 grand the engine starts stutering out untill i let out of it then i pull over and dissconect the neg to reset computer 2 min later it would do it again and tonight same thing happend except this time i reset computer drove around for almost an hour and no check engine light the car ran great anybody no what might be going on.