Severe Stumble Intermittingly on my 90

[moesvette]

Both good points, and I have not tried running it without secondary key in off position. I actually am a little nervous to take it out for a drive after the amount of stumbling I saw before, but it would be worth trying it without the secondary key on. Curious though, how if I have a possible vacuum issue, why it will run for periods of time perfectly and then only intermittingly stumble?

[Kevin]

Originally Posted by moesvette

Both good points, and I have not tried running it without secondary key in off position. I actually am a little nervous to take it out for a drive after the amount of stumbling I saw before, but it would be worth trying it without the secondary key on. Curious though, how if I have a possible vacuum issue, why it will run for periods of time perfectly and then only intermittingly stumble?

no idea but mine does the same thing. runs fine cold, soon as it warms up it stumbles and sets a code.

[XfireZ51]

Originally Posted by Kevin

no idea but mine does the same thing. runs fine cold, soon as it warms up it stumbles and sets a code.

Sounds like once it goes Closed Loop, then ...
Any chance you observed coolant temps when that occurs?

[Kevin]

Originally Posted by XfireZ51

Sounds like once it goes Closed Loop, then ...
Any chance you observed coolant temps when that occurs?

i was looking at the oil temp so no. Let's keep this on the TS problems. don't want to clutter up the thread.

[Paul Workman]

Originally Posted by XfireZ51

Sounds like once it goes Closed Loop, then ...
Any chance you observed coolant temps when that occurs?

Originally Posted by Kevin

i was looking at the oil temp so no. Let's keep this on the TS problems. don't want to clutter up the thread.

Say what? A perfectly good question, methinks! Open/Closed loop would certainly be of interest, Kevin, especially since CLOSED loop brings the O2*s into the picture.

*BTDT: A faulty O2 on one of my Vettes resulted in mild to severe stumbling, after going CLOSED loop.

[Kevin]

Originally Posted by Paul Workman

Say what? A perfectly good question, methinks! Open/Closed loop would certainly be of interest, Kevin, especially since CLOSED loop brings the O2*s into the picture.

*BTDT: A faulty O2 on one of my Vettes resulted in mild to severe stumbling, after going CLOSED loop.

I didn't want to clutter up this thread with problems with my car. I've got a handle on them, more or less.