AC idle drop, sometimes stalls

[PLP]

Originally Posted by blue62

Old and very wise rule of automotive trouble shooting:
Always go with the simplest things first.
Simple.

Very so true. Start with outside and follow inside.
My old story - I was helping my dad to resolve why in his 1982 Passat front parking lights would not work. It just came back from a body shop and both headlights were replaced. Low beams, high beams, fogs - are good. Parking lights - gone. Rear works, though.
Those cars were known for electrical issues. The old style connectors were poor.
I spent 3 hours chasing fuses, relays, connectors. I found that power is delivered to the headlight.
So finally, lets check the light bulbs.
Well, they were never installed.... and once you put them in - all worked just fine.
I spent 3.5 hours doing a 15 minute job. In late fall, in Poland (kind of like Michigan weather...).

Originally Posted by blue62

MAF sensor is next.... you can unplug it then take the car for a drive and see if the issue changes.
Wiring can be tested with a Multi Meter.

So you can just unplug it and drive? It will not scream at me?

[blue62]

Originally Posted by PLP

Very so true. Start with outside and follow inside.
My old story - I was helping my dad to resolve why in his 1982 Passat front parking lights would not work. It just came back from a body shop and both headlights were replaced. Low beams, high beams, fogs - are good. Parking lights - gone. Rear works, though.
Those cars were known for electrical issues. The old style connectors were poor.
I spent 3 hours chasing fuses, relays, connectors. I found that power is delivered to the headlight.
So finally, lets check the light bulbs.
Well, they were never installed.... and once you put them in - all worked just fine.
I spent 3.5 hours doing a 15 minute job. In late fall, in Poland (kind of like Michigan weather...).




So you can just unplug it and drive? It will not scream at me?

It will most likely through a code for the MAF.
But you can just delete it.
When you unplug the MAF the DME reverts to a default fueling strategy as a work around.
So you can use that fact to check MAF funtion.
Your just looking for any change to the issue your having..so unplug it go for short drive turn on the AC and evalute the results.
Then plug the MAF back in and clear the code if any.