There is no distributor on these cars. This is where you need to check fault codes. You can guess around all you want but plain and simple, there are too many possibilities. Could possibly be an ambient air temp sensor, mass air meter, clogged cat., crankshaft sensor, cam sensor or even a dme. Or even a combination of these. You'll need to beg, borrow or steal a diagnostic tool or else you'll be buying and returning parts for days. If you're really good and have access to an ETK then you could manually diagnose everything. Check connections to all four sensors and the dme first.
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