GP550iSport

I had it go off today and it told me that I had a flat. When I checked the tires they were fine. I had to go in FTM mode to reinitialize.

Rudy

This thread mentions some issues with FTM and version 12.

All I can say is I've never had mine give me any troubles before or after my version 12.2 upgrade.

realtyman

Funny that you just posted this. I just got in from checking my tire pressure.
I can't F'n believe it! Was going to start a new post.
Front tire Drivers Side 25lbs. So I check passenger side front. Also 25lbs! (WTF!) Check the rears. Both are at 30lbs exactly! (WTF!).

I thought the fronts looked a little low so I thought I'd check them. Glad I did.
(I know they are run-flats and are difficult to tell visually but they looked a little low).

Never any indication on the FTM (but both the fronts and rears would have been rotating the same). This is the first time that I checked the tire pressure (yeah, I know, Dumb-Ass!) but I can't see how both sides would be exactly at the same pressure(s) AND be very Low.

I'd be curious if anyone else has seen this. If you haven't checked your tire pressures you had better do it tomorrow!

I know my FTM works because the day I picked up may car from having the new steering rack put in my FTM went off within 5 miles of the dealership. I turned around and went back to have them check it and it turned out that I had a screw in my tire. The tire was repaired (at no charge) and off I went. So at least at that point (1,200 miles) I'd assume the pressures were fine. Now I'm at 7,500 miles. I wonder how long they have been this low. I makes me quite uneasy thinking how fast I've taken some off-ramps and on-ramps with these tire pressures!

On the other hand, I can't believe how well the car handeled with these tire pressures. Tonight I took one at 55mph with ease (that was the best I could get out of my Audi A6 2.7T Sport running on S-03's).

Can't wait to see what it'll do with Real tire pressures.

I'm thankful for the construction of the run-flats!

Rudy

You're exactly right, that's why the FTM didn't go off.

Guess I'll be checking my pressures tomorrow morning!

Thanks man!!

realtyman

I hope that I'm the only one, but with both fronts and rears being Exactly the same, I'm curious.

JDN

Tire and car dealers are notorious for setting the wrong pressures. Mine was delivered wrong, but I caught it in less than a week. I think we had a thread on this a few months ago. The lesson is: do not rely on someone else to be sure you have the pressure that you want. I have written it down for tire switches and still had it go awry. They don't check the pressure for your particular car. They just air them up.

GP550iSport

Thanks for the information guys, I appreciate it.

realtyman

Wow. The car responds a lot better now that I have air in the tires.
A lot less wandering on the highway and less tire squeal on my favorite off-ramps

realtyman

Mileage has gone from 17.5 mpg to 18.5 mpg by adding about 15 lbs of air in the tires.

Does this mean if I add ANOTHER 15 lbs......

GotBMW

What is a good setting for the tires?