'99 Boxster Decelerates, Loses Power

[rgriffin]

I just had similar problem with my 2001. It would usually run fine, but sometimes I would feel it lose power. When I stepped on gas pedal, no response. sometimes it would die and wouldnt start for a while. No cel lights ever came on, porsche repair shop dumbfounded. Finally died and had towed immediately. Turned out it was the fuel pump. Had it replaced and good ever since.

[keithl]

Originally Posted by rgriffin

I just had similar problem with my 2001. It would usually run fine, but sometimes I would feel it lose power. When I stepped on gas pedal, no response. sometimes it would die and wouldnt start for a while. No cel lights ever came on, porsche repair shop dumbfounded. Finally died and had towed immediately. Turned out it was the fuel pump. Had it replaced and good ever since.

Interesting, I will look into that next. I thought it might be my fuel pump, but never had one work intermittently before. Thanks.

[Jager]

When my fuel pump failed the car had the same symptoms just as you described. It had loss of power when trying to accelerate and then surge spastically. I had to slow down to maintain a drivable condition then I was able to get to my destination (repair shop) before it completely died and wouldn’t start. I'm glad to say it didn't leave me stranded.

[keithl]

Originally Posted by Jager

When my fuel pump failed the car had the same symptoms just as you described. It had loss of power when trying to accelerate and then surge spastically. I had to slow down to maintain a drivable condition then I was able to get to my destination (repair shop) before it completely died and wouldn’t start. I'm glad to say it didn't leave me stranded.

Thanks. Yep that's sounds like mine. I cleaned the MAF (which didn't seem dirty at all) and the car drove fine after that. But my problem has been intermittent, and since the
CEL didn't come on it makes my think it could still be the fuel pump.

[ppbon]

Originally Posted by keithl

since CEL didn't come on it makes my think it could still be the fuel pump.

Test to see if the CEL works. It may be burnt and you could have a bunch of codes.
Switch the ignition on (without starting the car) and see if the CEL lights up.
If it doesn't it may be out.
Happy Boxstering,
Pedro

[keithl]

Originally Posted by ppbon

Test to see if the CEL works. It may be burnt and you could have a bunch of codes.
Switch the ignition on (without starting the car) and see if the CEL lights up.
If it doesn't it may be out.
Happy Boxstering,
Pedro

Thanks!
It actually does come on with the other lights. Will there be codes there even if the CEL isn't on? Does it sound like a flakey fuel pump if the CEL isn't coming on?

[986_inquiry]

Originally Posted by keithl

Thanks!
It actually does come on with the other lights. Will there be codes there even if the CEL isn't on? Does it sound like a flakey fuel pump if the CEL isn't coming on?

Was this resolved? I'm having a very similar issue with a 987.

I will shift (downshift or upshift, doesn't matter), and once in the new gear the car acts like the gas pedal isn't even connected. Like tonight at a green light I had it in first and it started moving then it acted like the gas pedal wasn't even connected, so I shifted to 2nd and it acted normal again. Seems shifting fixes it, but I don't want to always have to shift, it should have power in the gear I'm in. Happened in 5th too, I even floored it and pumped the peddle, just acted like the gas pedal was connected to nothing but I could hear the peddle hit the floor, but as soon as I shifted to 4th it behaved normal again.