Engine stall

[yyp]

I stored the car in the garage for about a month, I disconect the battery,

after this, the car stalls once in a while when I drive on city streets or slow down at a corner.

I can immediately restart the car by placing the gar in second gear and engaging the clutch.

The engine runs roughly and sometimes surges unexpectedly.

Anyone knows what's wrong with my car? Thanks.

[wross996TT]

my and model of car? Get the codes read and we can help with interpreting and diagnosis. I would suggest using a battery tender vs. disconnecting the battery.

[GT2IAN]

WROSS,I am about to go away for six weeks.Why should I not disconnect the battery? ;)

[Loren]

Because that will erase the stored driving program in the DME (engine computer) and the car will have to re-learn it over each time you do.

[yyp]

It's a 2001 996 turbo, what should I do now?

[Loren]

Just drive it enough so that it can re-learn the program and then use a battery tender instead of disconnecting the battery.

[yyp]

Thx, I will try.

[Chuck Jones]

I was told that it takes about 100 miles for the computer to "relearn" the settings and your driving style....dunno if that's the straight story....but that's what I was told.

[GT2IAN]

My car sat for two days without a battery while I got a new one.When I put the new one in I can't say I noticed anything unusual except the need to enter the radio code.So is it such a problem to disconnect the battery or even take it out if I am away for several weeks?

[yyp]

Hi, Loren

I tried to drive my car, but the car just stalls a lot, can not even drive. It also came with check engine light and ABS light. I had read the codes, one is p0102, the other one is 5525, I have searched the code 5525 is caused by the Mass Air Flow sensor, when I disconnect the MAF sensor, my car just runs fine, should I just change the MAF sensor or it's the ECU's problem? I am using K&N filter now. Thanks.

[Loren]

Sounds like the K&N may have fouled your MAF.

You can try cleaning it - or replace it.