Starts and Stalls

[RCSnyder]

I posted about this a while back in the General Forums area, but have become convinced what I'm seeing is related to the factory security system, so...

2005 Ltd WPC Edition starts and almost immediately stalls most of the time, for the first several start attempts.

If I turn the key on, wait until the seatbelt dinger stops and crank again, most of the time it will keep running.

But I've noticed a correlation between staying running and the security system lamp going out. When the lamp is lit, it most often stalls. When the lamp is off, it always keeps running.

I'm concluding that there is something not right in the security system.

Both keys appear original factory, as are both key fobs.

Thoughts?

Bob in Liberty MO

[chuzz]

New batteries in the key fobs? IDK, just guessing.

[rockandroller]

What is it with that seatbell dinger system? Lately, IF I do not wait for all six dings (five, then a pause, then the sixth)… the dash will show a spurious oil light which stays on until I take the battery cable off and ground the ECU.


** there are only three dings if I do up the driver seatbelt before putting the key in, but there is a long delay after the first two...

[RCSnyder]

I compared the behavior of my 2003 to the 2005, and this is what I'm seeing:


The 2003 (Touring)...

1) Insert key, turn to ON, light comes on.
2) Car starts
3) Moments later, light goes off.
4) Car keeps running.


The 2005...

1) Insert key, turn to ON, light comes on most of the time.

2) Car starts

3a) If light stays on

4a) Car shuts off (stalls)

- or -

3b) Moments later, light goes off

4b) Car keeps running



It appears some sort of system test or security check is invoked by the key being turned ON (Light on). If the test/check fails (light remains on), the car shuts off after a programmed time. If it passes (Light goes off), things run as they should.


The most likely suspect in my mind is the sensor in the ignition switch, as all other alarm/security functions operates normally AND both keys act the same way. Could be wiring related to the sensor, but seems to be sensor related.

Has anyone had a car that started, shuts itself off and the ignition switch sensor was the culprit?

Or has anyone tried to use a replacement key that behaves the same way?


Thanks in advance.

Bob in Liberty MO