Guys/gals, I've got an '07 CS 6-spd I dearly enjoy driving, but on my first and only spirited road trip since purchasing it I noticed some hesitation in hard corning. When I was ready to power out of a corner, there was a slight but noticeable time lapse between applying the throttle and power delivery. Only happens in hard cornering. Doesn't seem to matter whether its right or left. I don't think it was fuel level. Only mechanical mod to the car is a Carnewal exhaust. Any ideas?
So it pulls hard with little or no hesitation in a straight line? In general terms I’d be looking at fuel delivery because spark delivery would not be changed by those driving situations.
PSM? Maybe the grip wasn't the greatest and the PSM was trying to save you? Did it light up on the dash?
That’s an excellent thought too because angles shouldn’t upset fuel delivery. Shot in the dark, does the tachometer reflect the stumbling in any way? If not, that would certainly point more to what Adam posted.
Yes I agree with Adam, sounds like PSM intervention.
How old are the rear tires? And what brand/model tire and what's the temperature where you are? Summer tires and cold weather will certainly see PSM kicking in.. as will old hard tire rubber.
I hadn't considered PSM. Unfortunately the PSM Off button doesn't work or I'd be curious to try driving without it. Tires were new and in temp so I don't believe PSM should have been interfering, but it's certainly possible. I wondered about maybe the fuel pump. I'm taking it for service tomorrow (local independent); I'll see if they can repair the PSM Off switch and see if any other theories emerge.
Thanks!
You must press and hold the PSM off button to disable. Its to make sure you dont accidentally disable it. And its never really off. It will still intervene in some situations
OK, thanks for the tip, I'll check it again.
Tire pressure? Quite often tire places fill the tires to the max pressure given by the manufacturer, which is for a heavily loaded vehicle. If you aren't that heavy the tires may be sliding a bit due to overpressure, and that will kick off PSM.
Great point. I have had many shops set my Boxster to 35psi because that's what they "think" is right. They never bother to look at the label (which says 30/29 IIRC - I check it every time regardless)... so certainly look at that. I usually check pressure with the dash, as it's quick and easy, and then if it's off then check with a real-gauge as well.
Side point, our EV calls for 38psi, so 34-35 would be wrong there, too. Only car we have at 35 is the Jetta... 2 out of 3 of our cars are NOT 35!
Couldn't agree more! Any time any of my vehicles sees a shop, the tire pressure is checked and reset the next morning (cold).
It's astounding to me that even the tire shops mess this up. They have only one job! <sigh>
