RallyJon

I tried to do the experiment referenced in the planetporsche thread referenced here: https://rennlist.com/forums/996-foru...-shifting.html where I hold the throttle at ~1000 rpm and push in the clutch pedal to see if it dips.

Only problem is, the revs rise by themselves. I tried this a bunch of times to make sure I wasn't subconsciously pushing harder on the gas pedal. In fact, I even tried to ease pressure slightly to keep the revs down, but there is no doubt: with constant light pressure on the gas pedal the rpms rise slowly at first through 1500, 2000, 2500, got to 3000 even--all with very, very light constant pressure. It is absolutely impossible to maintain a constant off-idle rpm in neutral.

Any idea what's going on? Is it supposed to do that?

Tippy

Mine did the same and it was a Tip.

ivangene

when I first got the car my Dad told me his "friend" had a Porsche and it started up, drove down the street and hit a light pole in the middle of the night..... all by itself ! ! ! ! !

I think your car wants to drive more... just dont park it without a chain around the wheels!!

peavynation

Ed, you're so crazy, you crack me up!!

It could have something to do with the clutch pedal switch that the ECU uses for part of a (misunderstood? At least not explained well yet) feature that the P-car uses to modulate the throttle and 'delay' response during clutch pedal transitions. Here's a recent link: https://rennlist.com/forums/996-foru...-shifting.html

My guess is that it's perfectly normal, but I'll try it soon with my 6sp car and see what happens.

wwest

Assuming "this" occurs during coastdown to a lower speed the engine RPM rises to prevent an engine stall in case you suddenly "dump" the clutch.

Just guessing.

RallyJon

No. Just sitting in the driveway in neutral.

gota911

I am surprised that Phil hasn't yet commented here. He is the "in the driveway" master.

Marc Gelefsky

But by starting a car that could be considered "Intent to drive"
So Phil probably avoided starting the engine.

gota911

Ahhh! Point well taken!

Macster

Normal. Courtesy of e-Gas. Why? I have no idea, but I've noticed this behavior with my 02 Boxster. I can't recall ever being successful at holding RPMs steady with transmission (stick) in neutral.

Sincerely,

Macster.

RallyJon

OK, thanks. I keep hoping that this car has something "fixable" rather than conceding that I'll just have to live with it.

Macster

Actually I sort of take back what I said. On way to work this AM tried holding engine RPMs steady with car (Turbo) stopped and transmission (6-speed) in neutral.

It took some effort -- very little pedal pressure and I mean very litte pedal pressure -- but I was able to get a steady RPM out of engine.

And I mean very little pedal pressure. Just a tiny tiny bit of pedal will have the RPMs climbing. I had to "back off" some until it felt like I was barely depressing the pedal at all and RPMs steadied just under 2K. Not sure I would have the patience/desire to try to hit a specific RPM but I was just happy RPMs steadied at all.

I'll bet if I try really hard I'll be able to get a steady RPM from Boxster engine too.

Sincerely,

Macster.