Check engine light on hard acceleration

[jsmith996tt]

I have a 2001 996 TT with 16,000 miles. On heavy acceleration I get a check engine light and the car sputters and goes flat. As soon as I let up on the gas the check engine light goes out and the car runs great. This always happens when if I accelerate hard from about 3000 rpm and sputters all the way up to 5000 or until I let my foot off the accelerator. Any Ideas?

thanks,

Joel

[Loren]

Get your fault codes and report back here.

[jsmith996tt]

I checked the faults with an OBDII code reader and it said zero faults. Does the Durametric have the capability of reading codes in a history that are no longer active?

thanks,

joel

[Loren]

If your check engine light comes on then there should be a code. Very few codes clear themselves on the sane drive (usually takes several drive cycles).

What did you use to read the codes?

Also, where are you located?

[jsmith996tt]

The check engine light only comes on for about 5 seconds, while the car is stumbling, when I let off the gas the car quits stumbling and the check engine light goes out. While the check engine light is on the center dash says to drive to a qualified repair shop. I am in Portland.

Joel

[deepblue5280]

Is your car modified? Sounds like my experience with a bad MAF, definitely check the codes and get back with Loren, he'll lead you in the right direction.

The check engine light only comes on for about 5 seconds, while the car is stumbling, when I let off the gas the car quits stumbling and the check engine light goes out. While the check engine light is on the center dash says to drive to a qualified repair shop. I am in Portland.

Joel

[wross996TT]

I checked the faults with an OBDII code reader and it said zero faults. Does the Durametric have the capability of reading codes in a history that are no longer active?

thanks,

joel

You need a better code reader...if the CEL came on there are codes to be read. Get the durametric...

[jsmith996tt]

The Check engine light finally stayed on long enough (slow steady flash) to throw a code P0301.

Joel

[Chuck Jones]

As I recall....the P0301 is a cylinder misfire on cylinder #3....bad plug or connection? I had a series of the P0XXX for a while, but it showed up on multiple cylinders and also a "random cylinder misfire" . They always showed up after a hard drive...finally the dealership changed out the MAF and the problem stopped.

[Loren]

P0301 Misfire, cylinder 1

You might also want to check the coil pack and spark plug on cylinder 1.