When accelerating, my 944 is fine all the way until 3200 rpm than its obviously lagging all the way up to redline. Could this be a clogged cat? the plugs only have about 5,000 miles on them, ignition wires and coil only a year old (NOLOGY IGNITION) and the muffler is a dynomax ultraflo zero restriction.

If its the cat, I plan to buy headers and buy a universal cat that i can bolt in and out on smog days only....

Any opinions? could it be the catalytic converter that is causing this?

 

*bump*

 

Seems like it might be a partially clogged cat, that only passes so much exhaust gas and then no more. I don't think there's any way to easily check it except to remove it.

cheers

Thaddeus

 

Inadequate fuel (or air) flow will cause this symptom also.
Possibly a dirty fuel filter or faulty pressure regulator or clogged air filter.

I would also check that the throttle is opening 100% when you put the pedal to the floor.