I had a problem with throttle hesitation before and car cannot rev properly. @ low rpms, hesitates and exhaust bubbles while slowly playing with the throttle, it gains rpms slowly but cannot reach top rpms or not alot of power. I've changed the MAF SENSOR just now and the car at first idle ok, but after 20 secs, it has a problem idling. however, if i give it gas, the throttle feels fresh and rpms build quick and will rev all the way with no problems. now only problem is once I let go of the throttle, the engine dies... I swap back the old MAF Sensor and car idles fine but the throttle hesitation comes back. both sensors have the same part no. (new part not OEM porsche) any ideas?

 

Have you cleaned the throttle body? Also, did you disconnect the battery so the computer can re-map itself?

 

I had the same problem. I cleaned the throttle Body and MAF problem fixed.

 

This could also be a bad coil (or two). Clean the MAF first and if that doesn't do the trick, replace the coils and plugs.

 

I've pulled the battery for a few hours and cleaned the throttle body and started the engine. It starts and keeps running for a bit and I can feel the engine trying to adjust itself with the rpms but after a while i rpms go up and down between 400-700. i can hear the exhaust have a lil bubbling sound but not sure if that's a misfire. eventually it will drop rpms to a point the engine will die but pulling the battery did make this better, atleast the engine tries to run unlike before and just dies. but now the car is still not really drivable. I'm thinking is it the coils and plugs or fuel filter