Stumble off idle - runs fine all other RPM

[Silber]

When I got my car back on the road it ran perfectly, but has developed something I am trying to troubleshoot.

When you try to accelerate from a stop it will sometimes stumble until it hits about 2000 RPMs and then goes fine. I think I smell unburned fuel when this happens, so I’m not suspecting a fueling problem. Also, if it were a fueling problem it would fall on its face at higher rpm’s which it does not. It Idles perfectly.

I cleaned the mass airflow sensor and that seemed to help for a while but it seems to be back.

I have a Durametric and I’m experiencing no codes or misfires.

Most of the Internet wisdom seems to say this kind of symptom is bad coil packs or a bad MAF, so I have ordered new of both. MAF will be here this week, coils next week. I am suspecting the MAF because it runs fine at Idle and above 2000 RPM, when i believe the MAF is not referenced. Problem seems to be worse when it’s moist out so that leads me to suspect the coils. These parts have over 100,000 miles on them so does not hurt to replace.

What I am looking for is other things to check until parts get here, and if these specific parts don’t fx it. what else could be causing this kind of seemingly intermittent and rpm specific symptom?

Regards,

Steve