This has been happening for years. I have a 01 996 C2 Tip. It use to just happen on the track with less then 1/2 tank of gas. Car would stall for 1-2 seconds then start running again. It's just like the ignition was turned off and back on. I now always track the car with at least 1/2 tank of gas. I replaced the fuel filter last month and everything has been fine. I was at the track last weekend, no stalling, then on the way home with over 1/2 tank of gas, I was stalling every 30 seconds for 2-3 seconds then the car would start running again. It's just like the ignition was turned off, wait 2-3 seconds and then turn it back on. I filled up the tank and no problems.

Could there be any problems with fuel pump lines. I know there are all type of lines coming and going from the fuel pump and maybe some have broken free and with less then a full tank of gas they are getting some type of vapor lock. Thanks for your help.

 

there is a little curved hose on the top of the fuel pump assembly that is a common problem...when your fuel level gets low that hose could be sucking air and causing your loss of fuel...do a search..I think you will find more info

 

Can just this hose be replaced or does the whole fuel pump with all hoses need to be replace? Since the car is 9 years old, maybe time to replace the complete fuel pump. Thanks for your help.

 

that may be a good idea while you are in there, especially if you are paying someone to do it....but the hose can be replaced by itself...here is the culprit...