I have a
2008 Cayman S
(
987.1
). I have read conflicting information about a procedure to adapt or calibrate the throttle actuator with the car's computer (
DME
). Some suggest this is necessary anytime you disconnect the
battery
. Some suggest this should be done routinely (maybe every 10k miles). Some suggest it is necessary when changing the throttle unit itself.
I have searched in my owner's manual. There is no mention of this at all in the manual. It does talk about needing to calibrate the power windows after disconnecting the
battery
.
So i have two questions:
1 - Is human initiated throttle adaptation/calibration something that applies to my car specifically (
987.1
3.4L CS)?
2 - If yes, what is the correct way to do it? (found conflicting info on this as well)
Thank you,
Ron Milliet
Long Beach MS
Ron,
I'm not certain about a 08 CS. In the Owners Manual for my 10 BS, there's nothing; but in the Service Manual for my 10 BS there is info for throttle "adaptation".
"For the learning and adaptation routine of the throttle valve (electronic throttle), switch the ignition off, remove ignition key, insert ignition key and switch on ignition for at least 40 seconds without starting the engine. Do not actuate accelerator pedal. This completes the adaptation of the throttle adjusting unit and the programming sequence is complete."
It talks about
PIWIS
coding as part of this, so you'll need help from a Dealer or a very good Indie. Good luck!
Joe Henley
I think the $150
iCarSoft
PORII can do it too. That said, I've never had to do it and I've disconnected my
battery
plenty of times.
Just closing out my thoughts and learnings on this thread.
I notice that somewhere around 30 seconds of key on, engine off, the throttle body/actuator seems to go into some sort of reset routine. It lasts less than 10 seconds. I noticed this because I attempted the "calibration" procedure with engine lid removed and throttle plate exposed. While patiently waiting for the first 60 second pass, I noticed this odd behavior right around 30 second mark.
I honestly cannot tell you what the unit is doing other than making noise and twitching around. I did not notice any difference in the way the car drove. I also attempted this after a
battery
disconnect with the same result.
This means any time you are scanning your
OBD
codes and/or using Durametric, this "feature" will occur as generally the key is in the ON position for more than 30 seconds.
FWIW: Here is the response from PCA Tech Questions to my original inquiry:
Submitted by Pedro Bonilla [GCT] on Wed, 08/15/2018 - 15:35
The
DME
will loose it's memory if disconnected for a while or the
battery
as well. When this happens it reverts to running with a preprogrammed map while it starts to re-learn and adjust. This is all done automatically and you have no control over it. It may take the car between 30 and 100 miles to fully complete all of the
DME
's adjusted maps.
An alternative that actually works is a
Sprint Booster
which is available for
Cayman
2006-2012. While not as complete as a FVD software tune for M97 motors, the
Sprint booster
can liven up your startup and also help rev matching by advancing the ignation a little and opening the throttle faster. You can use google search and look at the reviews and installition on P9.
