Hi All,

Yesterday my 2004 V70, 2.4 NA, 5sp stalled in traffic. It would start then die, 10X starts and died each time so it came home on a hook.
I found a problem in the cable connecting the MAF. Voltage was as speced but the resistance between pins 4-5 was 1.8 M ohm. I found the ECU locking bars were not fully engaged. I tightened them and the car fired right up and drove normally except the idle was low 600 vs 750.

Starting cold the engine has the normal high idle then it drops.

Today I started the car backed out of the driveway and it stalled. When the throttle was let off the engine revs drop and the car stalls.

No codes so I'm guessing it's the ECU.

Thoughts?

A disconnected MAF will not have an effect on idle. A loose ECU will cause all sorts of problems. It could be possible that some of the contacts at the ECU base got dirty or corroded during the 'loose' period. You may want to disconnect the battery, remove the ECU and clean the contacts.

But the throttle body should be cleaned, regardless of any other problems. Be on the look out for any cracked vacuum lines, fouled spark plugs, etc.
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Keeping it running is better than buying new

Have you cleaned the throttle body recently?

Have you cleaned the throttle body recently?