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engine or compiuter problem pls help

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hi to start my name is Luke i have 99 996c4 6 spd

i have a problem las week drove the car check engine light came on shut the car of an on during the travel store bathroom and so on light disiperd later on car running great at all times parkt at home next day morning outside temp about 40 F go start the car and the car is running like is missfireing on driver side check with my hand on exhoust ravd up same drove about 1 block same thing slight loss of pover parkt the core for about 5-8 hours

started agan check engine lightis off car running fine went for ride (raining outside) with psm of drove hard up to 6 k rpm engine shut down all the control light on car rolling in 4th gear pup the cluch restart the engine controll lights off oll but psm and ABS i tried to tyrn on PSM but i cant what is weard the light on the swech is off (it should be on) i stopt turn the car off all check lights off car running fine did the same agan with psm on the same thing happen boath cases flat spot in acceleration hard acceleration please help any one knows good porshe shop nj de pa md

thank you all for any help

Luke P.

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A faulty mass air flow sensor could cause these problems and if I read your description correctly the ABS/PSM light is coming on which could also be caused from the MAF. It might be best to get the codes check and report back.

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