Idle Issue

I had the same erratic idle and stall issue. I had just completed a major major where i had the entire upper engine apart and literally took painstaking effort to put together the cleanest 348 you'll ever see. Every component was either new or diagnosed as perfect. No vacuum leaks as well.

I had noticed once that by simply touching the secondary air intake tube assembly that the engine idle would change suddenly. But hell, that of course could not make sense since that system has nothing to do with idle vacuums in any way, its simply not in the loop.

But today, after the problem became so bad that the car would stall at every corner I had to stare at it for a while and think. While staring at that stupid secondary tube I noticed a interesting thing .... the MAV cable is literally resting on the secondary tube. In other words when I was moving about the secondary tube I was also jiggling the MAV cable.

So ... even though the MAV connector pins looked clean, I used some contact cleaner on them and re-connected diligently.

The world change.